# -*- coding: utf-8 -*-
"""
Acceptance tests for studio related to the outline page.
"""


import itertools
import json
from datetime import datetime, timedelta
from unittest import skip

from pytz import UTC
import six
from six.moves import range

from common.test.acceptance.fixtures.config import ConfigModelFixture
from common.test.acceptance.fixtures.course import XBlockFixtureDesc
from common.test.acceptance.pages.lms.course_home import CourseHomePage
from common.test.acceptance.pages.lms.courseware import CoursewarePage
from common.test.acceptance.pages.lms.progress import ProgressPage
from common.test.acceptance.pages.studio.checklists import CourseChecklistsPage
from common.test.acceptance.pages.studio.overview import ContainerPage, CourseOutlinePage, ExpandCollapseLinkState
from common.test.acceptance.pages.studio.settings import SettingsPage
from common.test.acceptance.pages.studio.settings_advanced import AdvancedSettingsPage
from common.test.acceptance.pages.studio.settings_group_configurations import GroupConfigurationsPage
from common.test.acceptance.pages.studio.utils import add_discussion, drag, verify_ordering
from common.test.acceptance.tests.helpers import disable_animations, load_data_str
from openedx.core.lib.tests import attr

from .base_studio_test import StudioCourseTest

SECTION_NAME = 'Test Section'
SUBSECTION_NAME = 'Test Subsection'
UNIT_NAME = 'Test Unit'


class CourseOutlineTest(StudioCourseTest):
    """
    Base class for all course outline tests
    """

    def setUp(self):
        """
        Install a course with no content using a fixture.
        """
        super(CourseOutlineTest, self).setUp()
        self.course_outline_page = CourseOutlinePage(
            self.browser, self.course_info['org'], self.course_info['number'], self.course_info['run']
        )
        self.advanced_settings = AdvancedSettingsPage(
            self.browser, self.course_info['org'], self.course_info['number'], self.course_info['run']
        )

    def populate_course_fixture(self, course_fixture):
        """ Install a course with sections/problems, tabs, updates, and handouts """
        course_fixture.add_children(
            XBlockFixtureDesc('chapter', SECTION_NAME).add_children(
                XBlockFixtureDesc('sequential', SUBSECTION_NAME).add_children(
                    XBlockFixtureDesc('vertical', UNIT_NAME).add_children(
                        XBlockFixtureDesc('problem', 'Test Problem 1', data=load_data_str('multiple_choice.xml')),
                        XBlockFixtureDesc('html', 'Test HTML Component'),
                        XBlockFixtureDesc('discussion', 'Test Discussion Component')
                    )
                )
            )
        )

    def do_action_and_verify(self, outline_page, action, expected_ordering):
        """
        Perform the supplied action and then verify the resulting ordering.
        """
        if outline_page is None:
            outline_page = self.course_outline_page.visit()

        action(outline_page)
        verify_ordering(self, outline_page, expected_ordering)

        # Reload the page and expand all subsections to see that the change was persisted.
        outline_page = self.course_outline_page.visit()
        outline_page.q(css='.outline-item.outline-subsection.is-collapsed .ui-toggle-expansion').click()
        verify_ordering(self, outline_page, expected_ordering)


@attr(shard=20)
class CourseOutlineDragAndDropTest(CourseOutlineTest):
    """
    Tests of drag and drop within the outline page.
    """
    __test__ = True

    def populate_course_fixture(self, course_fixture):
        """
        Create a course with one section, two subsections, and four units
        """
        # with collapsed outline
        self.chap_1_handle = 0
        self.chap_1_seq_1_handle = 1

        # with first sequential expanded
        self.seq_1_vert_1_handle = 2
        self.seq_1_vert_2_handle = 3
        self.chap_1_seq_2_handle = 4

        course_fixture.add_children(
            XBlockFixtureDesc('chapter', "1").add_children(
                XBlockFixtureDesc('sequential', '1.1').add_children(
                    XBlockFixtureDesc('vertical', '1.1.1'),
                    XBlockFixtureDesc('vertical', '1.1.2')
                ),
                XBlockFixtureDesc('sequential', '1.2').add_children(
                    XBlockFixtureDesc('vertical', '1.2.1'),
                    XBlockFixtureDesc('vertical', '1.2.2')
                )
            )
        )

    def drag_and_verify(self, source, target, expected_ordering, outline_page=None):
        self.do_action_and_verify(
            outline_page,
            lambda outline: drag(outline, source, target),
            expected_ordering
        )

    @skip("Fails in Firefox 45 but passes in Chrome")
    def test_drop_unit_in_collapsed_subsection(self):
        """
        Drag vertical "1.1.2" from subsection "1.1" into collapsed subsection "1.2" which already
        have its own verticals.
        """
        course_outline_page = self.course_outline_page.visit()
        # expand first subsection
        course_outline_page.q(css='.outline-item.outline-subsection.is-collapsed .ui-toggle-expansion').first.click()

        expected_ordering = [{"1": ["1.1", "1.2"]},
                             {"1.1": ["1.1.1"]},
                             {"1.2": ["1.1.2", "1.2.1", "1.2.2"]}]
        self.drag_and_verify(self.seq_1_vert_2_handle, self.chap_1_seq_2_handle, expected_ordering, course_outline_page)


@attr(shard=3)
class WarningMessagesTest(CourseOutlineTest):
    """
    Feature: Warning messages on sections, subsections, and units
    """

    __test__ = True

    STAFF_ONLY_WARNING = 'Contains staff only content'
    LIVE_UNPUBLISHED_WARNING = 'Unpublished changes to live content'
    FUTURE_UNPUBLISHED_WARNING = 'Unpublished changes to content that will release in the future'
    NEVER_PUBLISHED_WARNING = 'Unpublished units will not be released'

    class PublishState(object):
        """
        Default values for representing the published state of a unit
        """
        NEVER_PUBLISHED = 1
        UNPUBLISHED_CHANGES = 2
        PUBLISHED = 3
        VALUES = [NEVER_PUBLISHED, UNPUBLISHED_CHANGES, PUBLISHED]

    class UnitState(object):
        """ Represents the state of a unit """

        def __init__(self, is_released, publish_state, is_locked):
            """ Creates a new UnitState with the given properties """
            self.is_released = is_released
            self.publish_state = publish_state
            self.is_locked = is_locked

        @property
        def name(self):
            """ Returns an appropriate name based on the properties of the unit """
            result = "Released " if self.is_released else "Unreleased "
            if self.publish_state == WarningMessagesTest.PublishState.NEVER_PUBLISHED:
                result += "Never Published "
            elif self.publish_state == WarningMessagesTest.PublishState.UNPUBLISHED_CHANGES:
                result += "Unpublished Changes "
            else:
                result += "Published "
            result += "Locked" if self.is_locked else "Unlocked"
            return result

    def populate_course_fixture(self, course_fixture):
        """ Install a course with various configurations that could produce warning messages """

        # Define the dimensions that map to the UnitState constructor
        features = [
            [True, False],             # Possible values for is_released
            self.PublishState.VALUES,  # Possible values for publish_state
            [True, False]              # Possible values for is_locked
        ]

        # Add a fixture for every state in the product of features
        course_fixture.add_children(*[
            self._build_fixture(self.UnitState(*state)) for state in itertools.product(*features)
        ])

    def _build_fixture(self, unit_state):
        """ Returns an XBlockFixtureDesc with a section, subsection, and possibly unit that has the given state. """
        name = unit_state.name
        start = (datetime(1984, 3, 4) if unit_state.is_released else datetime.now(UTC) + timedelta(1)).isoformat()

        subsection = XBlockFixtureDesc('sequential', name, metadata={'start': start})

        # Children of never published subsections will be added on demand via _ensure_unit_present
        return XBlockFixtureDesc('chapter', name).add_children(
            subsection if unit_state.publish_state == self.PublishState.NEVER_PUBLISHED
            else subsection.add_children(
                XBlockFixtureDesc('vertical', name, metadata={
                    'visible_to_staff_only': True if unit_state.is_locked else None
                })
            )
        )

    def test_released_never_published_locked(self):
        """ Tests that released never published locked units display staff only warnings """
        self._verify_unit_warning(
            self.UnitState(is_released=True, publish_state=self.PublishState.NEVER_PUBLISHED, is_locked=True),
            self.STAFF_ONLY_WARNING
        )

    def test_released_never_published_unlocked(self):
        """ Tests that released never published unlocked units display 'Unpublished units will not be released' """
        self._verify_unit_warning(
            self.UnitState(is_released=True, publish_state=self.PublishState.NEVER_PUBLISHED, is_locked=False),
            self.NEVER_PUBLISHED_WARNING
        )

    def test_released_unpublished_changes_locked(self):
        """ Tests that released unpublished changes locked units display staff only warnings """
        self._verify_unit_warning(
            self.UnitState(is_released=True, publish_state=self.PublishState.UNPUBLISHED_CHANGES, is_locked=True),
            self.STAFF_ONLY_WARNING
        )

    def test_released_unpublished_changes_unlocked(self):
        """ Tests that released unpublished changes unlocked units display 'Unpublished changes to live content' """
        self._verify_unit_warning(
            self.UnitState(is_released=True, publish_state=self.PublishState.UNPUBLISHED_CHANGES, is_locked=False),
            self.LIVE_UNPUBLISHED_WARNING
        )

    def test_released_published_locked(self):
        """ Tests that released published locked units display staff only warnings """
        self._verify_unit_warning(
            self.UnitState(is_released=True, publish_state=self.PublishState.PUBLISHED, is_locked=True),
            self.STAFF_ONLY_WARNING
        )

    def test_released_published_unlocked(self):
        """ Tests that released published unlocked units display no warnings """
        self._verify_unit_warning(
            self.UnitState(is_released=True, publish_state=self.PublishState.PUBLISHED, is_locked=False),
            None
        )

    def test_unreleased_never_published_locked(self):
        """ Tests that unreleased never published locked units display staff only warnings """
        self._verify_unit_warning(
            self.UnitState(is_released=False, publish_state=self.PublishState.NEVER_PUBLISHED, is_locked=True),
            self.STAFF_ONLY_WARNING
        )

    def test_unreleased_never_published_unlocked(self):
        """ Tests that unreleased never published unlocked units display 'Unpublished units will not be released' """
        self._verify_unit_warning(
            self.UnitState(is_released=False, publish_state=self.PublishState.NEVER_PUBLISHED, is_locked=False),
            self.NEVER_PUBLISHED_WARNING
        )

    def test_unreleased_unpublished_changes_locked(self):
        """ Tests that unreleased unpublished changes locked units display staff only warnings """
        self._verify_unit_warning(
            self.UnitState(is_released=False, publish_state=self.PublishState.UNPUBLISHED_CHANGES, is_locked=True),
            self.STAFF_ONLY_WARNING
        )

    def test_unreleased_unpublished_changes_unlocked(self):
        """
        Tests that unreleased unpublished changes unlocked units display 'Unpublished changes to content that will
        release in the future'
        """
        self._verify_unit_warning(
            self.UnitState(is_released=False, publish_state=self.PublishState.UNPUBLISHED_CHANGES, is_locked=False),
            self.FUTURE_UNPUBLISHED_WARNING
        )

    def test_unreleased_published_locked(self):
        """ Tests that unreleased published locked units display staff only warnings """
        self._verify_unit_warning(
            self.UnitState(is_released=False, publish_state=self.PublishState.PUBLISHED, is_locked=True),
            self.STAFF_ONLY_WARNING
        )

    def test_unreleased_published_unlocked(self):
        """ Tests that unreleased published unlocked units display no warnings """
        self._verify_unit_warning(
            self.UnitState(is_released=False, publish_state=self.PublishState.PUBLISHED, is_locked=False),
            None
        )

    def _verify_unit_warning(self, unit_state, expected_status_message):
        """
        Verifies that the given unit's messages match the expected messages.
        If expected_status_message is None, then the unit status message is expected to not be present.
        """
        self._ensure_unit_present(unit_state)
        self.course_outline_page.visit()
        section = self.course_outline_page.section(unit_state.name)
        subsection = section.subsection_at(0)
        subsection.expand_subsection()
        unit = subsection.unit_at(0)
        if expected_status_message == self.STAFF_ONLY_WARNING:
            self.assertEqual(section.status_message, self.STAFF_ONLY_WARNING)
            self.assertEqual(subsection.status_message, self.STAFF_ONLY_WARNING)
            self.assertEqual(unit.status_message, self.STAFF_ONLY_WARNING)
        else:
            self.assertFalse(section.has_status_message)
            self.assertFalse(subsection.has_status_message)
            if expected_status_message:
                self.assertEqual(unit.status_message, expected_status_message)
            else:
                self.assertFalse(unit.has_status_message)

    def _ensure_unit_present(self, unit_state):
        """ Ensures that a unit with the given state is present on the course outline """
        if unit_state.publish_state == self.PublishState.PUBLISHED:
            return

        name = unit_state.name
        self.course_outline_page.visit()
        subsection = self.course_outline_page.section(name).subsection(name)
        subsection.expand_subsection()

        if unit_state.publish_state == self.PublishState.UNPUBLISHED_CHANGES:
            unit = subsection.unit(name).go_to()
            add_discussion(unit)
        elif unit_state.publish_state == self.PublishState.NEVER_PUBLISHED:
            subsection.add_unit()
            unit = ContainerPage(self.browser, None)
            unit.wait_for_page()
            unit.set_name(name)

        if unit.is_staff_locked != unit_state.is_locked:
            unit.toggle_staff_lock()


@attr(shard=3)
class EditingSectionsTest(CourseOutlineTest):
    """
    Feature: Editing Release date, Due date and grading type.
    """

    __test__ = True

    def test_can_edit_subsection(self):
        """
        Scenario: I can edit settings of subsection.

            Given that I have created a subsection
            Then I see release date, due date and grading policy of subsection in course outline
            When I click on the configuration icon
            Then edit modal window is shown
            And release date, due date and grading policy fields present
            And they have correct initial values
            Then I set new values for these fields
            And I click save button on the modal
            Then I see release date, due date and grading policy of subsection in course outline
        """
        self.course_outline_page.visit()
        subsection = self.course_outline_page.section(SECTION_NAME).subsection(SUBSECTION_NAME)

        # Verify that Release date visible by default
        self.assertTrue(subsection.release_date)
        # Verify that Due date and Policy hidden by default
        self.assertFalse(subsection.due_date)
        self.assertFalse(subsection.policy)

        modal = subsection.edit()

        # Verify fields
        self.assertTrue(modal.has_release_date())
        self.assertTrue(modal.has_release_time())
        self.assertTrue(modal.has_due_date())
        self.assertTrue(modal.has_due_time())
        self.assertTrue(modal.has_policy())

        # Verify initial values
        self.assertEqual(modal.release_date, u'1/1/1970')
        self.assertEqual(modal.release_time, u'00:00')
        self.assertEqual(modal.due_date, u'')
        self.assertEqual(modal.due_time, u'')
        self.assertEqual(modal.policy, u'Not Graded')

        # Set new values
        modal.release_date = '3/12/1972'
        modal.release_time = '04:01'
        modal.due_date = '7/21/2014'
        modal.due_time = '23:39'
        modal.policy = 'Lab'

        modal.save()
        self.assertIn(u'Released: Mar 12, 1972', subsection.release_date)
        self.assertIn(u'04:01', subsection.release_date)
        self.assertIn(u'Due: Jul 21, 2014', subsection.due_date)
        self.assertIn(u'23:39', subsection.due_date)
        self.assertIn(u'Lab', subsection.policy)

    def test_can_edit_section(self):
        """
        Scenario: I can edit settings of section.

            Given that I have created a section
            Then I see release date of section in course outline
            When I click on the configuration icon
            Then edit modal window is shown
            And release date field present
            And it has correct initial value
            Then I set new value for this field
            And I click save button on the modal
            Then I see release date of section in course outline
        """
        self.course_outline_page.visit()
        section = self.course_outline_page.section(SECTION_NAME)

        # Verify that Release date visible by default
        self.assertTrue(section.release_date)
        # Verify that Due date and Policy are not present
        self.assertFalse(section.due_date)
        self.assertFalse(section.policy)

        modal = section.edit()
        # Verify fields
        self.assertTrue(modal.has_release_date())
        self.assertFalse(modal.has_due_date())
        self.assertFalse(modal.has_policy())

        # Verify initial value
        self.assertEqual(modal.release_date, u'1/1/1970')

        # Set new value
        modal.release_date = '5/14/1969'

        modal.save()
        self.assertIn(u'Released: May 14, 1969', section.release_date)
        # Verify that Due date and Policy are not present
        self.assertFalse(section.due_date)
        self.assertFalse(section.policy)

    def test_subsection_is_graded_in_lms(self):
        """
        Scenario: I can grade subsection from course outline page.

            Given I visit progress page
            And I see that problem in subsection has grading type "Practice"
            Then I visit course outline page
            And I click on the configuration icon of subsection
            And I set grading policy to "Lab"
            And I click save button on the modal
            Then I visit progress page
            And I see that problem in subsection has grading type "Problem"
        """
        progress_page = ProgressPage(self.browser, self.course_id)
        progress_page.visit()
        progress_page.wait_for_page()
        self.assertEqual(u'Practice', progress_page.grading_formats[0])
        self.course_outline_page.visit()

        subsection = self.course_outline_page.section(SECTION_NAME).subsection(SUBSECTION_NAME)
        modal = subsection.edit()
        # Set new values
        modal.policy = 'Lab'
        modal.save()

        progress_page.visit()

        self.assertEqual(u'Problem', progress_page.grading_formats[0])

    def test_unchanged_release_date_is_not_saved(self):
        """
        Scenario: Saving a subsection without changing the release date will not override the release date
            Given that I have created a section with a subsection
            When I open the settings modal for the subsection
            And I pressed save
            And I open the settings modal for the section
            And I change the release date to 07/20/1969
            And I press save
            Then the subsection and the section have the release date 07/20/1969
        """
        self.course_outline_page.visit()

        modal = self.course_outline_page.section_at(0).subsection_at(0).edit()
        modal.save()

        modal = self.course_outline_page.section_at(0).edit()
        modal.release_date = '7/20/1969'
        modal.save()

        release_text = 'Released: Jul 20, 1969'
        self.assertIn(release_text, self.course_outline_page.section_at(0).release_date)
        self.assertIn(release_text, self.course_outline_page.section_at(0).subsection_at(0).release_date)


@attr(shard=3)
class UnitAccessTest(CourseOutlineTest):
    """
    Feature: Units can be restricted and unrestricted to certain groups from the course outline.
    """

    __test__ = True

    def setUp(self):
        super(UnitAccessTest, self).setUp()
        self.group_configurations_page = GroupConfigurationsPage(
            self.browser,
            self.course_info['org'],
            self.course_info['number'],
            self.course_info['run']
        )
        self.content_group_a = "Test Group A"
        self.content_group_b = "Test Group B"

        self.group_configurations_page.visit()
        self.group_configurations_page.create_first_content_group()
        config_a = self.group_configurations_page.content_groups[0]
        config_a.name = self.content_group_a
        config_a.save()
        self.content_group_a_id = config_a.id

        self.group_configurations_page.add_content_group()
        config_b = self.group_configurations_page.content_groups[1]
        config_b.name = self.content_group_b
        config_b.save()
        self.content_group_b_id = config_b.id

    def populate_course_fixture(self, course_fixture):
        """
        Create a course with one section, one subsection, and two units
        """
        # with collapsed outline
        self.chap_1_handle = 0
        self.chap_1_seq_1_handle = 1

        # with first sequential expanded
        self.seq_1_vert_1_handle = 2
        self.seq_1_vert_2_handle = 3
        self.chap_1_seq_2_handle = 4

        course_fixture.add_children(
            XBlockFixtureDesc('chapter', "1").add_children(
                XBlockFixtureDesc('sequential', '1.1').add_children(
                    XBlockFixtureDesc('vertical', '1.1.1'),
                    XBlockFixtureDesc('vertical', '1.1.2')
                )
            )
        )


@attr(shard=14)
class StaffLockTest(CourseOutlineTest):
    """
    Feature: Sections, subsections, and units can be locked and unlocked from the course outline.
    """

    __test__ = True

    def populate_course_fixture(self, course_fixture):
        """ Create a course with one section, two subsections, and four units """
        course_fixture.add_children(
            XBlockFixtureDesc('chapter', '1').add_children(
                XBlockFixtureDesc('sequential', '1.1').add_children(
                    XBlockFixtureDesc('vertical', '1.1.1'),
                    XBlockFixtureDesc('vertical', '1.1.2')
                ),
                XBlockFixtureDesc('sequential', '1.2').add_children(
                    XBlockFixtureDesc('vertical', '1.2.1'),
                    XBlockFixtureDesc('vertical', '1.2.2')
                )
            )
        )

    def _verify_descendants_are_staff_only(self, item):
        """Verifies that all the descendants of item are staff only"""
        self.assertTrue(item.is_staff_only)
        if hasattr(item, 'children'):
            for child in item.children():
                self._verify_descendants_are_staff_only(child)

    def _remove_staff_lock_and_verify_warning(self, outline_item, expect_warning):
        """Removes staff lock from a course outline item and checks whether or not a warning appears."""
        modal = outline_item.edit()
        modal.is_explicitly_locked = False
        if expect_warning:
            self.assertTrue(modal.shows_staff_lock_warning())
        else:
            self.assertFalse(modal.shows_staff_lock_warning())
        modal.save()

    def _toggle_lock_on_unlocked_item(self, outline_item):
        """Toggles outline_item's staff lock on and then off, verifying the staff lock warning"""
        self.assertFalse(outline_item.has_staff_lock_warning)
        outline_item.set_staff_lock(True)
        self.assertTrue(outline_item.has_staff_lock_warning)
        self._verify_descendants_are_staff_only(outline_item)
        outline_item.set_staff_lock(False)
        self.assertFalse(outline_item.has_staff_lock_warning)

    def _verify_explicit_staff_lock_remains_after_unlocking_parent(self, child_item, parent_item):
        """Verifies that child_item's explicit staff lock remains after removing parent_item's staff lock"""
        child_item.set_staff_lock(True)
        parent_item.set_staff_lock(True)
        self.assertTrue(parent_item.has_staff_lock_warning)
        self.assertTrue(child_item.has_staff_lock_warning)
        parent_item.set_staff_lock(False)
        self.assertFalse(parent_item.has_staff_lock_warning)
        self.assertTrue(child_item.has_staff_lock_warning)

    def test_units_can_be_locked(self):
        """
        Scenario: Units can be locked and unlocked from the course outline page
            Given I have a course with a unit
            When I click on the configuration icon
            And I enable explicit staff locking
            And I click save
            Then the unit shows a staff lock warning
            And when I click on the configuration icon
            And I disable explicit staff locking
            And I click save
            Then the unit does not show a staff lock warning
        """
        self.course_outline_page.visit()
        self.course_outline_page.expand_all_subsections()
        unit = self.course_outline_page.section_at(0).subsection_at(0).unit_at(0)
        self._toggle_lock_on_unlocked_item(unit)

    def test_subsections_can_be_locked(self):
        """
        Scenario: Subsections can be locked and unlocked from the course outline page
            Given I have a course with a subsection
            When I click on the subsection's configuration icon
            And I enable explicit staff locking
            And I click save
            Then the subsection shows a staff lock warning
            And all its descendants are staff locked
            And when I click on the subsection's configuration icon
            And I disable explicit staff locking
            And I click save
            Then the the subsection does not show a staff lock warning
        """
        self.course_outline_page.visit()
        self.course_outline_page.expand_all_subsections()
        subsection = self.course_outline_page.section_at(0).subsection_at(0)
        self._toggle_lock_on_unlocked_item(subsection)

    def test_sections_can_be_locked(self):
        """
        Scenario: Sections can be locked and unlocked from the course outline page
            Given I have a course with a section
            When I click on the section's configuration icon
            And I enable explicit staff locking
            And I click save
            Then the section shows a staff lock warning
            And all its descendants are staff locked
            And when I click on the section's configuration icon
            And I disable explicit staff locking
            And I click save
            Then the section does not show a staff lock warning
        """
        self.course_outline_page.visit()
        self.course_outline_page.expand_all_subsections()
        section = self.course_outline_page.section_at(0)
        self._toggle_lock_on_unlocked_item(section)

    def test_explicit_staff_lock_remains_after_unlocking_section(self):
        """
        Scenario: An explicitly locked unit is still locked after removing an inherited lock from a section
            Given I have a course with sections, subsections, and units
            And I have enabled explicit staff lock on a section and one of its units
            When I click on the section's configuration icon
            And I disable explicit staff locking
            And I click save
            Then the unit still shows a staff lock warning
        """
        self.course_outline_page.visit()
        self.course_outline_page.expand_all_subsections()
        section = self.course_outline_page.section_at(0)
        unit = section.subsection_at(0).unit_at(0)
        self._verify_explicit_staff_lock_remains_after_unlocking_parent(unit, section)

    def test_explicit_staff_lock_remains_after_unlocking_subsection(self):
        """
        Scenario: An explicitly locked unit is still locked after removing an inherited lock from a subsection
            Given I have a course with sections, subsections, and units
            And I have enabled explicit staff lock on a subsection and one of its units
            When I click on the subsection's configuration icon
            And I disable explicit staff locking
            And I click save
            Then the unit still shows a staff lock warning
        """
        self.course_outline_page.visit()
        self.course_outline_page.expand_all_subsections()
        subsection = self.course_outline_page.section_at(0).subsection_at(0)
        unit = subsection.unit_at(0)
        self._verify_explicit_staff_lock_remains_after_unlocking_parent(unit, subsection)

    def test_section_displays_lock_when_all_subsections_locked(self):
        """
        Scenario: All subsections in section are explicitly locked, section should display staff only warning
            Given I have a course one section and two subsections
            When I enable explicit staff lock on all the subsections
            Then the section shows a staff lock warning
        """
        self.course_outline_page.visit()
        section = self.course_outline_page.section_at(0)
        section.subsection_at(0).set_staff_lock(True)
        section.subsection_at(1).set_staff_lock(True)
        self.assertTrue(section.has_staff_lock_warning)

    def test_section_displays_lock_when_all_units_locked(self):
        """
        Scenario: All units in a section are explicitly locked, section should display staff only warning
            Given I have a course with one section, two subsections, and four units
            When I enable explicit staff lock on all the units
            Then the section shows a staff lock warning
        """
        self.course_outline_page.visit()
        self.course_outline_page.expand_all_subsections()
        section = self.course_outline_page.section_at(0)
        section.subsection_at(0).unit_at(0).set_staff_lock(True)
        section.subsection_at(0).unit_at(1).set_staff_lock(True)
        section.subsection_at(1).unit_at(0).set_staff_lock(True)
        section.subsection_at(1).unit_at(1).set_staff_lock(True)
        self.assertTrue(section.has_staff_lock_warning)

    def test_subsection_displays_lock_when_all_units_locked(self):
        """
        Scenario: All units in subsection are explicitly locked, subsection should display staff only warning
            Given I have a course with one subsection and two units
            When I enable explicit staff lock on all the units
            Then the subsection shows a staff lock warning
        """
        self.course_outline_page.visit()
        self.course_outline_page.expand_all_subsections()
        subsection = self.course_outline_page.section_at(0).subsection_at(0)
        subsection.unit_at(0).set_staff_lock(True)
        subsection.unit_at(1).set_staff_lock(True)
        self.assertTrue(subsection.has_staff_lock_warning)

    def test_section_does_not_display_lock_when_some_subsections_locked(self):
        """
        Scenario: Only some subsections in section are explicitly locked, section should NOT display staff only warning
            Given I have a course with one section and two subsections
            When I enable explicit staff lock on one subsection
            Then the section does not show a staff lock warning
        """
        self.course_outline_page.visit()
        section = self.course_outline_page.section_at(0)
        section.subsection_at(0).set_staff_lock(True)
        self.assertFalse(section.has_staff_lock_warning)

    def test_section_does_not_display_lock_when_some_units_locked(self):
        """
        Scenario: Only some units in section are explicitly locked, section should NOT display staff only warning
            Given I have a course with one section, two subsections, and four units
            When I enable explicit staff lock on three units
            Then the section does not show a staff lock warning
        """
        self.course_outline_page.visit()
        self.course_outline_page.expand_all_subsections()
        section = self.course_outline_page.section_at(0)
        section.subsection_at(0).unit_at(0).set_staff_lock(True)
        section.subsection_at(0).unit_at(1).set_staff_lock(True)
        section.subsection_at(1).unit_at(1).set_staff_lock(True)
        self.assertFalse(section.has_staff_lock_warning)

    def test_subsection_does_not_display_lock_when_some_units_locked(self):
        """
        Scenario: Only some units in subsection are explicitly locked, subsection should NOT display staff only warning
            Given I have a course with one subsection and two units
            When I enable explicit staff lock on one unit
            Then the subsection does not show a staff lock warning
        """
        self.course_outline_page.visit()
        self.course_outline_page.expand_all_subsections()
        subsection = self.course_outline_page.section_at(0).subsection_at(0)
        subsection.unit_at(0).set_staff_lock(True)
        self.assertFalse(subsection.has_staff_lock_warning)

    def test_locked_sections_do_not_appear_in_lms(self):
        """
        Scenario: A locked section is not visible to students in the LMS
            Given I have a course with two sections
            When I enable explicit staff lock on one section
            And I click the View Live button to switch to staff view
            And I visit the course home with the outline
            Then I see two sections in the outline
            And when I switch the view mode to student view
            Then I see one section in the outline
        """
        self.course_outline_page.visit()
        self.course_outline_page.add_section_from_top_button()
        self.course_outline_page.section_at(1).set_staff_lock(True)
        self.course_outline_page.view_live()

        course_home_page = CourseHomePage(self.browser, self.course_id)
        course_home_page.visit()
        course_home_page.wait_for_page()
        self.assertEqual(course_home_page.outline.num_sections, 2)
        course_home_page.preview.set_staff_view_mode('Learner')
        course_home_page.wait_for(lambda: course_home_page.outline.num_sections == 1,
                                  'Only 1 section is visible in the outline')

    def test_toggling_staff_lock_on_section_does_not_publish_draft_units(self):
        """
        Scenario: Locking and unlocking a section will not publish its draft units
            Given I have a course with a section and unit
            And the unit has a draft and published version
            When I enable explicit staff lock on the section
            And I disable explicit staff lock on the section
            And I click the View Live button to switch to staff view
            Then I see the published version of the unit
        """
        self.course_outline_page.visit()
        self.course_outline_page.expand_all_subsections()
        unit = self.course_outline_page.section_at(0).subsection_at(0).unit_at(0).go_to()
        add_discussion(unit)
        self.course_outline_page.visit()
        self.course_outline_page.expand_all_subsections()
        section = self.course_outline_page.section_at(0)
        section.set_staff_lock(True)
        section.set_staff_lock(False)
        unit = section.subsection_at(0).unit_at(0).go_to()
        unit.view_published_version()
        courseware = CoursewarePage(self.browser, self.course_id)
        courseware.wait_for_page()
        self.assertEqual(courseware.num_xblock_components, 0)

    def test_toggling_staff_lock_on_subsection_does_not_publish_draft_units(self):
        """
        Scenario: Locking and unlocking a subsection will not publish its draft units
            Given I have a course with a subsection and unit
            And the unit has a draft and published version
            When I enable explicit staff lock on the subsection
            And I disable explicit staff lock on the subsection
            And I click the View Live button to switch to staff view
            Then I see the published version of the unit
        """
        self.course_outline_page.visit()
        self.course_outline_page.expand_all_subsections()
        unit = self.course_outline_page.section_at(0).subsection_at(0).unit_at(0).go_to()
        add_discussion(unit)
        self.course_outline_page.visit()
        self.course_outline_page.expand_all_subsections()
        subsection = self.course_outline_page.section_at(0).subsection_at(0)
        subsection.set_staff_lock(True)
        subsection.set_staff_lock(False)
        unit = subsection.unit_at(0).go_to()
        unit.view_published_version()
        courseware = CoursewarePage(self.browser, self.course_id)
        courseware.wait_for_page()
        self.assertEqual(courseware.num_xblock_components, 0)

    def test_removing_staff_lock_from_unit_without_inherited_lock_shows_warning(self):
        """
        Scenario: Removing explicit staff lock from a unit which does not inherit staff lock displays a warning.
            Given I have a course with a subsection and unit
            When I enable explicit staff lock on the unit
            And I disable explicit staff lock on the unit
            Then I see a modal warning.
        """
        self.course_outline_page.visit()
        self.course_outline_page.expand_all_subsections()
        unit = self.course_outline_page.section_at(0).subsection_at(0).unit_at(0)
        unit.set_staff_lock(True)
        self._remove_staff_lock_and_verify_warning(unit, True)

    def test_removing_staff_lock_from_subsection_without_inherited_lock_shows_warning(self):
        """
        Scenario: Removing explicit staff lock from a subsection which does not inherit staff lock displays a warning.
            Given I have a course with a section and subsection
            When I enable explicit staff lock on the subsection
            And I disable explicit staff lock on the subsection
            Then I see a modal warning.
        """
        self.course_outline_page.visit()
        self.course_outline_page.expand_all_subsections()
        subsection = self.course_outline_page.section_at(0).subsection_at(0)
        subsection.set_staff_lock(True)
        self._remove_staff_lock_and_verify_warning(subsection, True)

    def test_removing_staff_lock_from_unit_with_inherited_lock_shows_no_warning(self):
        """
        Scenario: Removing explicit staff lock from a unit which also inherits staff lock displays no warning.
            Given I have a course with a subsection and unit
            When I enable explicit staff lock on the subsection
            And I enable explicit staff lock on the unit
            When I disable explicit staff lock on the unit
            Then I do not see a modal warning.
        """
        self.course_outline_page.visit()
        self.course_outline_page.expand_all_subsections()
        subsection = self.course_outline_page.section_at(0).subsection_at(0)
        unit = subsection.unit_at(0)
        subsection.set_staff_lock(True)
        unit.set_staff_lock(True)
        self._remove_staff_lock_and_verify_warning(unit, False)

    def test_removing_staff_lock_from_subsection_with_inherited_lock_shows_no_warning(self):
        """
        Scenario: Removing explicit staff lock from a subsection which also inherits staff lock displays no warning.
            Given I have a course with a section and subsection
            When I enable explicit staff lock on the section
            And I enable explicit staff lock on the subsection
            When I disable explicit staff lock on the subsection
            Then I do not see a modal warning.
        """
        self.course_outline_page.visit()
        self.course_outline_page.expand_all_subsections()
        section = self.course_outline_page.section_at(0)
        subsection = section.subsection_at(0)
        section.set_staff_lock(True)
        subsection.set_staff_lock(True)
        self._remove_staff_lock_and_verify_warning(subsection, False)


@attr(shard=20)
class EditNamesTest(CourseOutlineTest):
    """
    Feature: Click-to-edit section/subsection names
    """

    __test__ = True

    def set_name_and_verify(self, item, old_name, new_name, expected_name):
        """
        Changes the display name of item from old_name to new_name, then verifies that its value is expected_name.
        """
        self.assertEqual(item.name, old_name)
        item.change_name(new_name)
        self.assertFalse(item.in_editable_form())
        self.assertEqual(item.name, expected_name)

    def test_edit_section_name(self):
        """
        Scenario: Click-to-edit section name
            Given that I have created a section
            When I click on the name of section
            Then the section name becomes editable
            And given that I have edited the section name
            When I click outside of the edited section name
            Then the section name saves
            And becomes non-editable
        """
        self.course_outline_page.visit()
        self.set_name_and_verify(
            self.course_outline_page.section_at(0),
            'Test Section',
            'Changed',
            'Changed'
        )

    def test_edit_subsection_name(self):
        """
        Scenario: Click-to-edit subsection name
            Given that I have created a subsection
            When I click on the name of subsection
            Then the subsection name becomes editable
            And given that I have edited the subsection name
            When I click outside of the edited subsection name
            Then the subsection name saves
            And becomes non-editable
        """
        self.course_outline_page.visit()
        self.set_name_and_verify(
            self.course_outline_page.section_at(0).subsection_at(0),
            'Test Subsection',
            'Changed',
            'Changed'
        )

    def test_edit_empty_section_name(self):
        """
        Scenario: Click-to-edit section name, enter empty name
            Given that I have created a section
            And I have clicked to edit the name of the section
            And I have entered an empty section name
            When I click outside of the edited section name
            Then the section name does not change
            And becomes non-editable
        """
        self.course_outline_page.visit()
        self.set_name_and_verify(
            self.course_outline_page.section_at(0),
            'Test Section',
            '',
            'Test Section'
        )

    def test_edit_empty_subsection_name(self):
        """
        Scenario: Click-to-edit subsection name, enter empty name
            Given that I have created a subsection
            And I have clicked to edit the name of the subsection
            And I have entered an empty subsection name
            When I click outside of the edited subsection name
            Then the subsection name does not change
            And becomes non-editable
        """
        self.course_outline_page.visit()
        self.set_name_and_verify(
            self.course_outline_page.section_at(0).subsection_at(0),
            'Test Subsection',
            '',
            'Test Subsection'
        )

    def test_editing_names_does_not_expand_collapse(self):
        """
        Scenario: A section stays in the same expand/collapse state while its name is edited
            Given that I have created a section
            And the section is collapsed
            When I click on the name of the section
            Then the section is collapsed
            And given that I have entered a new name
            Then the section is collapsed
            And given that I press ENTER to finalize the name
            Then the section is collapsed
        """
        self.course_outline_page.visit()
        self.course_outline_page.section_at(0).expand_subsection()
        self.assertFalse(self.course_outline_page.section_at(0).in_editable_form())
        self.assertTrue(self.course_outline_page.section_at(0).is_collapsed)
        self.course_outline_page.section_at(0).edit_name()
        self.assertTrue(self.course_outline_page.section_at(0).in_editable_form())
        self.assertTrue(self.course_outline_page.section_at(0).is_collapsed)
        self.course_outline_page.section_at(0).enter_name('Changed')
        self.assertTrue(self.course_outline_page.section_at(0).is_collapsed)
        self.course_outline_page.section_at(0).finalize_name()
        self.assertTrue(self.course_outline_page.section_at(0).is_collapsed)


@attr(shard=14)
class CreateSectionsTest(CourseOutlineTest):
    """
    Feature: Create new sections/subsections/units
    """

    __test__ = True

    def populate_course_fixture(self, course_fixture):
        """ Start with a completely empty course to easily test adding things to it """
        pass

    def test_create_new_section_from_top_button(self):
        """
        Scenario: Create new section from button at top of page
            Given that I am on the course outline
            When I click the "+ Add section" button at the top of the page
            Then I see a new section added to the bottom of the page
            And the display name is in its editable form.
        """
        self.course_outline_page.visit()
        self.course_outline_page.add_section_from_top_button()
        self.assertEqual(len(self.course_outline_page.sections()), 1)
        self.assertTrue(self.course_outline_page.section_at(0).in_editable_form())

    def test_create_new_section_from_bottom_button(self):
        """
        Scenario: Create new section from button at bottom of page
            Given that I am on the course outline
            When I click the "+ Add section" button at the bottom of the page
            Then I see a new section added to the bottom of the page
            And the display name is in its editable form.
        """
        self.course_outline_page.visit()
        self.course_outline_page.add_section_from_bottom_button()
        self.assertEqual(len(self.course_outline_page.sections()), 1)
        self.assertTrue(self.course_outline_page.section_at(0).in_editable_form())

    def test_create_new_section_from_bottom_button_plus_icon(self):
        """
        Scenario: Create new section from button plus icon at bottom of page
            Given that I am on the course outline
            When I click the plus icon in "+ Add section" button at the bottom of the page
            Then I see a new section added to the bottom of the page
            And the display name is in its editable form.
        """
        self.course_outline_page.visit()
        self.course_outline_page.add_section_from_bottom_button(click_child_icon=True)
        self.assertEqual(len(self.course_outline_page.sections()), 1)
        self.assertTrue(self.course_outline_page.section_at(0).in_editable_form())

    def test_create_new_subsection(self):
        """
        Scenario: Create new subsection
            Given that I have created a section
            When I click the "+ Add subsection" button in that section
            Then I see a new subsection added to the bottom of the section
            And the display name is in its editable form.
        """
        self.course_outline_page.visit()
        self.course_outline_page.add_section_from_top_button()
        self.assertEqual(len(self.course_outline_page.sections()), 1)
        self.course_outline_page.section_at(0).add_subsection()
        subsections = self.course_outline_page.section_at(0).subsections()
        self.assertEqual(len(subsections), 1)
        self.assertTrue(subsections[0].in_editable_form())

    def test_create_new_unit(self):
        """
        Scenario: Create new unit
            Given that I have created a section
            And that I have created a subsection within that section
            When I click the "+ Add unit" button in that subsection
            Then I am redirected to a New Unit page
            And the display name is in its editable form.
        """
        self.course_outline_page.visit()
        self.course_outline_page.add_section_from_top_button()
        self.assertEqual(len(self.course_outline_page.sections()), 1)
        self.course_outline_page.section_at(0).add_subsection()
        self.assertEqual(len(self.course_outline_page.section_at(0).subsections()), 1)
        self.course_outline_page.section_at(0).subsection_at(0).add_unit()
        unit_page = ContainerPage(self.browser, None)
        unit_page.wait_for_page()
        self.assertTrue(unit_page.is_inline_editing_display_name())


@attr(shard=4)
class DeleteContentTest(CourseOutlineTest):
    """
    Feature: Deleting sections/subsections/units
    """

    __test__ = True

    def test_delete_section(self):
        """
        Scenario: Delete section
            Given that I am on the course outline
            When I click the delete button for a section on the course outline
            Then I should receive a confirmation message, asking me if I really want to delete the section
            When I click "Yes, I want to delete this component"
            Then the confirmation message should close
            And the section should immediately be deleted from the course outline
        """
        self.course_outline_page.visit()
        self.assertEqual(len(self.course_outline_page.sections()), 1)
        self.course_outline_page.section_at(0).delete()
        self.assertEqual(len(self.course_outline_page.sections()), 0)

    def test_cancel_delete_section(self):
        """
        Scenario: Cancel delete of section
            Given that I clicked the delte button for a section on the course outline
            And I received a confirmation message, asking me if I really want to delete the component
            When I click "Cancel"
            Then the confirmation message should close
            And the section should remain in the course outline
        """
        self.course_outline_page.visit()
        self.assertEqual(len(self.course_outline_page.sections()), 1)
        self.course_outline_page.section_at(0).delete(cancel=True)
        self.assertEqual(len(self.course_outline_page.sections()), 1)

    def test_delete_subsection(self):
        """
        Scenario: Delete subsection
            Given that I am on the course outline
            When I click the delete button for a subsection on the course outline
            Then I should receive a confirmation message, asking me if I really want to delete the subsection
            When I click "Yes, I want to delete this component"
            Then the confiramtion message should close
            And the subsection should immediately be deleted from the course outline
        """
        self.course_outline_page.visit()
        self.assertEqual(len(self.course_outline_page.section_at(0).subsections()), 1)
        self.course_outline_page.section_at(0).subsection_at(0).delete()
        self.assertEqual(len(self.course_outline_page.section_at(0).subsections()), 0)

    def test_cancel_delete_subsection(self):
        """
        Scenario: Cancel delete of subsection
            Given that I clicked the delete button for a subsection on the course outline
            And I received a confirmation message, asking me if I really want to delete the subsection
            When I click "cancel"
            Then the confirmation message should close
            And the subsection should remain in the course outline
        """
        self.course_outline_page.visit()
        self.assertEqual(len(self.course_outline_page.section_at(0).subsections()), 1)
        self.course_outline_page.section_at(0).subsection_at(0).delete(cancel=True)
        self.assertEqual(len(self.course_outline_page.section_at(0).subsections()), 1)

    def test_delete_unit(self):
        """
        Scenario: Delete unit
            Given that I am on the course outline
            When I click the delete button for a unit on the course outline
            Then I should receive a confirmation message, asking me if I really want to delete the unit
            When I click "Yes, I want to delete this unit"
            Then the confirmation message should close
            And the unit should immediately be deleted from the course outline
        """
        self.course_outline_page.visit()
        self.course_outline_page.section_at(0).subsection_at(0).expand_subsection()
        self.assertEqual(len(self.course_outline_page.section_at(0).subsection_at(0).units()), 1)
        self.course_outline_page.section_at(0).subsection_at(0).unit_at(0).delete()
        self.assertEqual(len(self.course_outline_page.section_at(0).subsection_at(0).units()), 0)

    def test_cancel_delete_unit(self):
        """
        Scenario: Cancel delete of unit
            Given that I clicked the delete button for a unit on the course outline
            And I received a confirmation message, asking me if I really want to delete the unit
            When I click "Cancel"
            Then the confirmation message should close
            And the unit should remain in the course outline
        """
        self.course_outline_page.visit()
        self.course_outline_page.section_at(0).subsection_at(0).expand_subsection()
        self.assertEqual(len(self.course_outline_page.section_at(0).subsection_at(0).units()), 1)
        self.course_outline_page.section_at(0).subsection_at(0).unit_at(0).delete(cancel=True)
        self.assertEqual(len(self.course_outline_page.section_at(0).subsection_at(0).units()), 1)

    def test_delete_all_no_content_message(self):
        """
        Scenario: Delete all sections/subsections/units in a course, "no content" message should appear
            Given that I delete all sections, subsections, and units in a course
            When I visit the course outline
            Then I will see a message that says, "You haven't added any content to this course yet"
            Add see a + Add Section button
        """
        self.course_outline_page.visit()
        self.assertFalse(self.course_outline_page.has_no_content_message)
        self.course_outline_page.section_at(0).delete()
        self.assertEqual(len(self.course_outline_page.sections()), 0)
        self.assertTrue(self.course_outline_page.has_no_content_message)


@attr(shard=14)
class ExpandCollapseMultipleSectionsTest(CourseOutlineTest):
    """
    Feature: Courses with multiple sections can expand and collapse all sections.
    """

    __test__ = True

    def populate_course_fixture(self, course_fixture):
        """ Start with a course with two sections """
        course_fixture.add_children(
            XBlockFixtureDesc('chapter', 'Test Section').add_children(
                XBlockFixtureDesc('sequential', 'Test Subsection').add_children(
                    XBlockFixtureDesc('vertical', 'Test Unit')
                )
            ),
            XBlockFixtureDesc('chapter', 'Test Section 2').add_children(
                XBlockFixtureDesc('sequential', 'Test Subsection 2').add_children(
                    XBlockFixtureDesc('vertical', 'Test Unit 2')
                )
            )
        )

    def verify_all_sections(self, collapsed):
        """
        Verifies that all sections are collapsed if collapsed is True, otherwise all expanded.
        """
        for section in self.course_outline_page.sections():
            self.assertEqual(collapsed, section.is_collapsed)

    def toggle_all_sections(self):
        """
        Toggles the expand collapse state of all sections.
        """
        for section in self.course_outline_page.sections():
            section.expand_subsection()

    def test_expanded_by_default(self):
        """
        Scenario: The default layout for the outline page is to show sections in expanded view
            Given I have a course with sections
            When I navigate to the course outline page
            Then I see the "Collapse All Sections" link
            And all sections are expanded
        """
        self.course_outline_page.visit()
        self.assertEqual(self.course_outline_page.expand_collapse_link_state, ExpandCollapseLinkState.COLLAPSE)
        self.verify_all_sections(collapsed=False)

    def test_no_expand_link_for_empty_course(self):
        """
        Scenario: Collapse link is removed after last section of a course is deleted
            Given I have a course with multiple sections
            And I navigate to the course outline page
            When I will confirm all alerts
            And I press the "section" delete icon
            Then I do not see the "Collapse All Sections" link
            And I will see a message that says "You haven't added any content to this course yet"
        """
        self.course_outline_page.visit()
        for section in self.course_outline_page.sections():
            section.delete()
        self.assertEqual(self.course_outline_page.expand_collapse_link_state, ExpandCollapseLinkState.MISSING)
        self.assertTrue(self.course_outline_page.has_no_content_message)

    def test_collapse_all_when_all_expanded(self):
        """
        Scenario: Collapse all sections when all sections are expanded
            Given I navigate to the outline page of a course with sections
            And all sections are expanded
            When I click the "Collapse All Sections" link
            Then I see the "Expand All Sections" link
            And all sections are collapsed
        """
        self.course_outline_page.visit()
        self.verify_all_sections(collapsed=False)
        self.course_outline_page.toggle_expand_collapse()
        self.assertEqual(self.course_outline_page.expand_collapse_link_state, ExpandCollapseLinkState.EXPAND)
        self.verify_all_sections(collapsed=True)

    def test_collapse_all_when_some_expanded(self):
        """
        Scenario: Collapsing all sections when 1 or more sections are already collapsed
            Given I navigate to the outline page of a course with sections
            And all sections are expanded
            When I collapse the first section
            And I click the "Collapse All Sections" link
            Then I see the "Expand All Sections" link
            And all sections are collapsed
        """
        self.course_outline_page.visit()
        self.verify_all_sections(collapsed=False)
        self.course_outline_page.section_at(0).expand_subsection()
        self.course_outline_page.toggle_expand_collapse()
        self.assertEqual(self.course_outline_page.expand_collapse_link_state, ExpandCollapseLinkState.EXPAND)
        self.verify_all_sections(collapsed=True)

    def test_expand_all_when_all_collapsed(self):
        """
        Scenario: Expanding all sections when all sections are collapsed
            Given I navigate to the outline page of a course with multiple sections
            And I click the "Collapse All Sections" link
            When I click the "Expand All Sections" link
            Then I see the "Collapse All Sections" link
            And all sections are expanded
        """
        self.course_outline_page.visit()
        self.course_outline_page.toggle_expand_collapse()
        self.assertEqual(self.course_outline_page.expand_collapse_link_state, ExpandCollapseLinkState.EXPAND)
        self.course_outline_page.toggle_expand_collapse()
        self.assertEqual(self.course_outline_page.expand_collapse_link_state, ExpandCollapseLinkState.COLLAPSE)
        self.verify_all_sections(collapsed=False)

    def test_expand_all_when_some_collapsed(self):
        """
        Scenario: Expanding all sections when 1 or more sections are already expanded
            Given I navigate to the outline page of a course with multiple sections
            And I click the "Collapse All Sections" link
            When I expand the first section
            And I click the "Expand All Sections" link
            Then I see the "Collapse All Sections" link
            And all sections are expanded
        """
        self.course_outline_page.visit()
        # We have seen unexplainable sporadic failures in this test. Try disabling animations to see
        # if that helps.
        disable_animations(self.course_outline_page)
        self.course_outline_page.toggle_expand_collapse()
        self.assertEqual(self.course_outline_page.expand_collapse_link_state, ExpandCollapseLinkState.EXPAND)
        self.verify_all_sections(collapsed=True)
        self.course_outline_page.section_at(0).expand_subsection()
        self.course_outline_page.toggle_expand_collapse()
        self.assertEqual(self.course_outline_page.expand_collapse_link_state, ExpandCollapseLinkState.COLLAPSE)
        self.verify_all_sections(collapsed=False)


@attr(shard=14)
class ExpandCollapseSingleSectionTest(CourseOutlineTest):
    """
    Feature: Courses with a single section can expand and collapse all sections.
    """

    __test__ = True

    def test_no_expand_link_for_empty_course(self):
        """
        Scenario: Collapse link is removed after last section of a course is deleted
            Given I have a course with one section
            And I navigate to the course outline page
            When I will confirm all alerts
            And I press the "section" delete icon
            Then I do not see the "Collapse All Sections" link
            And I will see a message that says "You haven't added any content to this course yet"
        """
        self.course_outline_page.visit()
        self.course_outline_page.section_at(0).delete()
        self.assertEqual(self.course_outline_page.expand_collapse_link_state, ExpandCollapseLinkState.MISSING)
        self.assertTrue(self.course_outline_page.has_no_content_message)

    def test_old_subsection_stays_collapsed_after_creation(self):
        """
        Scenario: Collapsed subsection stays collapsed after creating a new subsection
            Given I have a course with one section and subsection
            And I navigate to the course outline page
            Then the subsection is collapsed
            And when I create a new subsection
            Then the first subsection is collapsed
            And the second subsection is expanded
        """
        self.course_outline_page.visit()
        self.assertTrue(self.course_outline_page.section_at(0).subsection_at(0).is_collapsed)
        self.course_outline_page.section_at(0).add_subsection()
        self.assertTrue(self.course_outline_page.section_at(0).subsection_at(0).is_collapsed)
        self.assertFalse(self.course_outline_page.section_at(0).subsection_at(1).is_collapsed)


@attr(shard=14)
class ExpandCollapseEmptyTest(CourseOutlineTest):
    """
    Feature: Courses with no sections initially can expand and collapse all sections after addition.
    """

    __test__ = True

    def populate_course_fixture(self, course_fixture):
        """ Start with an empty course """
        pass

    def test_no_expand_link_for_empty_course(self):
        """
        Scenario: Expand/collapse for a course with no sections
            Given I have a course with no sections
            When I navigate to the course outline page
            Then I do not see the "Collapse All Sections" link
        """
        self.course_outline_page.visit()
        self.assertEqual(self.course_outline_page.expand_collapse_link_state, ExpandCollapseLinkState.MISSING)

    def test_link_appears_after_section_creation(self):
        """
        Scenario: Collapse link appears after creating first section of a course
            Given I have a course with no sections
            When I navigate to the course outline page
            And I add a section
            Then I see the "Collapse All Sections" link
            And all sections are expanded
        """
        self.course_outline_page.visit()
        self.assertEqual(self.course_outline_page.expand_collapse_link_state, ExpandCollapseLinkState.MISSING)
        self.course_outline_page.add_section_from_top_button()
        self.assertEqual(self.course_outline_page.expand_collapse_link_state, ExpandCollapseLinkState.COLLAPSE)
        self.assertFalse(self.course_outline_page.section_at(0).is_collapsed)


@attr(shard=20)
class DefaultStatesEmptyTest(CourseOutlineTest):
    """
    Feature: Misc course outline default states/actions when starting with an empty course
    """

    __test__ = True

    def populate_course_fixture(self, course_fixture):
        """ Start with an empty course """
        pass

    def test_empty_course_message(self):
        """
        Scenario: Empty course state
            Given that I am in a course with no sections, subsections, nor units
            When I visit the course outline
            Then I will see a message that says "You haven't added any content to this course yet"
            And see a + Add Section button
        """
        self.course_outline_page.visit()
        self.assertTrue(self.course_outline_page.has_no_content_message)
        self.assertTrue(self.course_outline_page.bottom_add_section_button.is_present())


@attr(shard=4)
class DefaultStatesContentTest(CourseOutlineTest):
    """
    Feature: Misc course outline default states/actions when starting with a course with content
    """

    __test__ = True

    def test_view_live(self):
        """
        Scenario: View Live version from course outline
            Given that I am on the course outline
            When I click the "View Live" button
            Then a new tab will open to the course on the LMS
        """
        self.course_outline_page.visit()
        self.course_outline_page.view_live()
        courseware = CoursewarePage(self.browser, self.course_id)
        courseware.wait_for_page()
        self.assertEqual(courseware.num_xblock_components, 3)
        self.assertEqual(courseware.xblock_component_type(0), 'problem')
        self.assertEqual(courseware.xblock_component_type(1), 'html')
        self.assertEqual(courseware.xblock_component_type(2), 'discussion')


@attr(shard=7)
class UnitNavigationTest(CourseOutlineTest):
    """
    Feature: Navigate to units
    """

    __test__ = True

    def test_navigate_to_unit(self):
        """
        Scenario: Click unit name to navigate to unit page
            Given that I have expanded a section/subsection so I can see unit names
            When I click on a unit name
            Then I will be taken to the appropriate unit page
        """
        self.course_outline_page.visit()
        self.course_outline_page.section_at(0).subsection_at(0).expand_subsection()
        unit = self.course_outline_page.section_at(0).subsection_at(0).unit_at(0).go_to()
        unit.wait_for_page()


@attr(shard=7)
class PublishSectionTest(CourseOutlineTest):
    """
    Feature: Publish sections.
    """

    __test__ = True

    def populate_course_fixture(self, course_fixture):
        """
        Sets up a course structure with 2 subsections inside a single section.
        The first subsection has 2 units, and the second subsection has one unit.
        """
        self.courseware = CoursewarePage(self.browser, self.course_id)
        self.course_home_page = CourseHomePage(self.browser, self.course_id)
        course_fixture.add_children(
            XBlockFixtureDesc('chapter', SECTION_NAME).add_children(
                XBlockFixtureDesc('sequential', SUBSECTION_NAME).add_children(
                    XBlockFixtureDesc('vertical', UNIT_NAME),
                    XBlockFixtureDesc('vertical', 'Test Unit 2'),
                ),
                XBlockFixtureDesc('sequential', 'Test Subsection 2').add_children(
                    XBlockFixtureDesc('vertical', 'Test Unit 3'),
                ),
            ),
        )

    def test_unit_publishing(self):
        """
        Scenario: Can publish a unit and see published content in LMS
            Given I have a section with 2 subsections and 3 unpublished units
            When I go to the course outline
            Then I see publish button for the first unit, subsection, section
            When I publish the first unit
            Then I see that publish button for the first unit disappears
            And I see publish buttons for subsection, section
            And I see the changed content in LMS
        """
        self._add_unpublished_content()
        self.course_outline_page.visit()
        section, subsection, unit = self._get_items()
        self.assertTrue(unit.publish_action)
        self.assertTrue(subsection.publish_action)
        self.assertTrue(section.publish_action)
        unit.publish()
        self.assertFalse(unit.publish_action)
        self.assertTrue(subsection.publish_action)
        self.assertTrue(section.publish_action)
        self.courseware.visit()
        self.assertEqual(1, self.courseware.num_xblock_components)

    def test_subsection_publishing(self):
        """
        Scenario: Can publish a subsection and see published content in LMS
            Given I have a section with 2 subsections and 3 unpublished units
            When I go to the course outline
            Then I see publish button for the unit, subsection, section
            When I publish the first subsection
            Then I see that publish button for the first subsection disappears
            And I see that publish buttons disappear for the child units of the subsection
            And I see publish button for section
            And I see the changed content in LMS
        """
        self._add_unpublished_content()
        self.course_outline_page.visit()
        section, subsection, unit = self._get_items()
        self.assertTrue(unit.publish_action)
        self.assertTrue(subsection.publish_action)
        self.assertTrue(section.publish_action)
        self.course_outline_page.section(SECTION_NAME).subsection(SUBSECTION_NAME).publish()
        self.assertFalse(unit.publish_action)
        self.assertFalse(subsection.publish_action)
        self.assertTrue(section.publish_action)
        self.courseware.visit()
        self.assertEqual(1, self.courseware.num_xblock_components)
        self.courseware.go_to_sequential_position(2)
        self.assertEqual(1, self.courseware.num_xblock_components)

    def test_section_publishing(self):
        """
        Scenario: Can publish a section and see published content in LMS
            Given I have a section with 2 subsections and 3 unpublished units
            When I go to the course outline
            Then I see publish button for the unit, subsection, section
            When I publish the section
            Then I see that publish buttons disappears
            And I see the changed content in LMS
        """
        self._add_unpublished_content()
        self.course_outline_page.visit()
        section, subsection, unit = self._get_items()
        self.assertTrue(subsection.publish_action)
        self.assertTrue(section.publish_action)
        self.assertTrue(unit.publish_action)
        self.course_outline_page.section(SECTION_NAME).publish()
        self.assertFalse(subsection.publish_action)
        self.assertFalse(section.publish_action)
        self.assertFalse(unit.publish_action)
        self.courseware.visit()
        self.assertEqual(1, self.courseware.num_xblock_components)
        self.courseware.go_to_sequential_position(2)
        self.assertEqual(1, self.courseware.num_xblock_components)
        self.course_home_page.visit()
        self.course_home_page.outline.go_to_section(SECTION_NAME, 'Test Subsection 2')
        self.assertEqual(1, self.courseware.num_xblock_components)

    def _add_unpublished_content(self):
        """
        Adds unpublished HTML content to first three units in the course.
        """
        for index in range(3):
            self.course_fixture.create_xblock(
                self.course_fixture.get_nested_xblocks(category="vertical")[index].locator,
                XBlockFixtureDesc('html', 'Unpublished HTML Component ' + str(index)),
            )

    def _get_items(self):
        """
        Returns first section, subsection, and unit on the page.
        """
        section = self.course_outline_page.section(SECTION_NAME)
        subsection = section.subsection(SUBSECTION_NAME)
        unit = subsection.expand_subsection().unit(UNIT_NAME)

        return (section, subsection, unit)


@attr(shard=7)
class DeprecationWarningMessageTest(CourseOutlineTest):
    """
    Feature: Verify deprecation warning message.
    """
    HEADING_TEXT = 'This course uses features that are no longer supported.'
    COMPONENT_LIST_HEADING = 'You must delete or replace the following components.'
    ADVANCE_MODULES_REMOVE_TEXT = (
        u'To avoid errors, édX strongly recommends that you remove unsupported features '
        u'from the course advanced settings. To do this, go to the Advanced Settings '
        u'page, locate the "Advanced Module List" setting, and then delete the following '
        u'modules from the list.'
    )
    DEFAULT_DISPLAYNAME = "Deprecated Component"

    def _add_deprecated_advance_modules(self, block_types):
        """
        Add `block_types` into `Advanced Module List`

        Arguments:
            block_types (list): list of block types
        """
        self.advanced_settings.visit()
        self.advanced_settings.set_values({"Advanced Module List": json.dumps(block_types)})

    def _create_deprecated_components(self):
        """
        Create deprecated components.
        """
        parent_vertical = self.course_fixture.get_nested_xblocks(category="vertical")[0]

        self.course_fixture.create_xblock(
            parent_vertical.locator,
            XBlockFixtureDesc('poll', "Poll", data=load_data_str('poll_markdown.xml'))
        )
        self.course_fixture.create_xblock(parent_vertical.locator, XBlockFixtureDesc('survey', 'Survey'))

    def _verify_deprecation_warning_info(
            self,
            deprecated_blocks_present,
            components_present,
            components_display_name_list=None,
            deprecated_modules_list=None
    ):
        """
        Verify deprecation warning

        Arguments:
            deprecated_blocks_present (bool): deprecated blocks remove text and
                is list is visible if True else False
            components_present (bool): components list shown if True else False
            components_display_name_list (list): list of components display name
            deprecated_modules_list (list): list of deprecated advance modules
        """
        self.assertTrue(self.course_outline_page.deprecated_warning_visible)
        self.assertEqual(self.course_outline_page.warning_heading_text, self.HEADING_TEXT)
        self.assertEqual(self.course_outline_page.modules_remove_text_shown, deprecated_blocks_present)
        if deprecated_blocks_present:
            self.assertEqual(self.course_outline_page.modules_remove_text, self.ADVANCE_MODULES_REMOVE_TEXT)
            self.assertEqual(self.course_outline_page.deprecated_advance_modules, deprecated_modules_list)

        self.assertEqual(self.course_outline_page.components_visible, components_present)
        if components_present:
            self.assertEqual(self.course_outline_page.components_list_heading, self.COMPONENT_LIST_HEADING)
            six.assertCountEqual(self, self.course_outline_page.components_display_names, components_display_name_list)

    def test_no_deprecation_warning_message_present(self):
        """
        Scenario: Verify that deprecation warning message is not shown if no deprecated
            advance modules are not present and also no deprecated component exist in
            course outline.

        When I goto course outline
        Then I don't see any deprecation warning
        """
        self.course_outline_page.visit()
        self.assertFalse(self.course_outline_page.deprecated_warning_visible)

    def test_deprecation_warning_message_present(self):
        """
        Scenario: Verify deprecation warning message if deprecated modules
            and components are present.

        Given I have "poll" advance modules present in `Advanced Module List`
        And I have created 2 poll components
        When I go to course outline
        Then I see poll deprecated warning
        And I see correct poll deprecated warning heading text
        And I see correct poll deprecated warning advance modules remove text
        And I see list of poll components with correct display names
        """
        self._add_deprecated_advance_modules(block_types=['poll', 'survey'])
        self._create_deprecated_components()
        self.course_outline_page.visit()
        self._verify_deprecation_warning_info(
            deprecated_blocks_present=True,
            components_present=True,
            components_display_name_list=['Poll', 'Survey'],
            deprecated_modules_list=['poll', 'survey']
        )

    def test_deprecation_warning_with_no_displayname(self):
        """
        Scenario: Verify deprecation warning message if poll components are present.

        Given I have created 1 poll deprecated component
        When I go to course outline
        Then I see poll deprecated warning
        And I see correct poll deprecated warning heading text
        And I see list of poll components with correct message
        """
        parent_vertical = self.course_fixture.get_nested_xblocks(category="vertical")[0]

        # Create a deprecated component with display_name to be empty and make sure
        # the deprecation warning is displayed with
        self.course_fixture.create_xblock(
            parent_vertical.locator,
            XBlockFixtureDesc(category='poll', display_name="", data=load_data_str('poll_markdown.xml'))
        )
        self.course_outline_page.visit()

        self._verify_deprecation_warning_info(
            deprecated_blocks_present=False,
            components_present=True,
            components_display_name_list=[self.DEFAULT_DISPLAYNAME],
        )

    def test_warning_with_poll_advance_modules_only(self):
        """
        Scenario: Verify that deprecation warning message is shown if only
            poll advance modules are present and no poll component exist.

        Given I have poll advance modules present in `Advanced Module List`
        When I go to course outline
        Then I see poll deprecated warning
        And I see correct poll deprecated warning heading text
        And I see correct poll deprecated warning advance modules remove text
        And I don't see list of poll components
        """
        self._add_deprecated_advance_modules(block_types=['poll', 'survey'])
        self.course_outline_page.visit()
        self._verify_deprecation_warning_info(
            deprecated_blocks_present=True,
            components_present=False,
            deprecated_modules_list=['poll', 'survey']
        )

    def test_warning_with_poll_components_only(self):
        """
        Scenario: Verify that deprecation warning message is shown if only
            poll component exist and no poll advance modules are present.

        Given I have created two poll components
        When I go to course outline
        Then I see poll deprecated warning
        And I see correct poll deprecated warning heading text
        And I don't see poll deprecated warning advance modules remove text
        And I see list of poll components with correct display names
        """
        self._create_deprecated_components()
        self.course_outline_page.visit()
        self._verify_deprecation_warning_info(
            deprecated_blocks_present=False,
            components_present=True,
            components_display_name_list=['Poll', 'Survey']
        )


@attr(shard=4)
class SelfPacedOutlineTest(CourseOutlineTest):
    """Test the course outline for a self-paced course."""

    def populate_course_fixture(self, course_fixture):
        course_fixture.add_children(
            XBlockFixtureDesc('chapter', SECTION_NAME).add_children(
                XBlockFixtureDesc('sequential', SUBSECTION_NAME).add_children(
                    XBlockFixtureDesc('vertical', UNIT_NAME)
                )
            ),
        )
        self.course_fixture.add_course_details({
            'self_paced': True,
            'start_date': datetime.now() + timedelta(days=1)
        })
        ConfigModelFixture('/config/self_paced', {'enabled': True}).install()

    def test_release_dates_not_shown(self):
        """
        Scenario: Ensure that block release dates are not shown on the
            course outline page of a self-paced course.

        Given I am the author of a self-paced course
        When I go to the course outline
        Then I should not see release dates for course content
        """
        self.course_outline_page.visit()
        section = self.course_outline_page.section(SECTION_NAME)
        self.assertEqual(section.release_date, '')
        subsection = section.subsection(SUBSECTION_NAME)
        self.assertEqual(subsection.release_date, '')

    def test_edit_section_and_subsection(self):
        """
        Scenario: Ensure that block release/due dates are not shown
            in their settings modals.

        Given I am the author of a self-paced course
        When I go to the course outline
        And I click on settings for a section or subsection
        Then I should not see release or due date settings
        """
        self.course_outline_page.visit()
        section = self.course_outline_page.section(SECTION_NAME)
        modal = section.edit()
        self.assertFalse(modal.has_release_date())
        self.assertFalse(modal.has_due_date())
        modal.cancel()
        subsection = section.subsection(SUBSECTION_NAME)
        modal = subsection.edit()
        self.assertFalse(modal.has_release_date())
        self.assertFalse(modal.has_due_date())


class CourseStatusOutlineTest(CourseOutlineTest):
    """Test the course outline status section."""
    shard = 8

    def setUp(self):
        super(CourseStatusOutlineTest, self).setUp()

        self.schedule_and_details_settings = SettingsPage(
            self.browser,
            self.course_info['org'],
            self.course_info['number'],
            self.course_info['run']
        )

        self.checklists = CourseChecklistsPage(
            self.browser,
            self.course_info['org'],
            self.course_info['number'],
            self.course_info['run']
        )

    def test_course_status_section(self):
        """
        Ensure that the course status section appears in the course outline.
        """
        self.course_outline_page.visit()
        self.assertTrue(self.course_outline_page.has_course_status_section)

    def test_course_status_section_start_date_link(self):
        """
        Ensure that the course start date link in the course status section in
        the course outline links to the "Schedule and Details" page.
        """
        self.course_outline_page.visit()
        self.course_outline_page.click_course_status_section_start_date_link()
        self.schedule_and_details_settings.wait_for_page()

    def test_course_status_section_checklists_link(self):
        """
        Ensure that the course checklists link in the course status section in
        the course outline links to the "Checklists" page.
        """
        self.course_outline_page.visit()
        self.course_outline_page.click_course_status_section_checklists_link()
        self.checklists.wait_for_page()


class InstructorPacedToSelfPacedOutlineTest(CourseOutlineTest):
    """
    Test the course outline when pacing is changed from
    instructor to self paced.
    """
    def populate_course_fixture(self, course_fixture):
        course_fixture.add_children(
            XBlockFixtureDesc('chapter', SECTION_NAME).add_children(
                XBlockFixtureDesc('sequential', SUBSECTION_NAME).add_children(
                    XBlockFixtureDesc('vertical', UNIT_NAME)
                )
            ),
        )
        self.course_fixture.add_course_details({
            'start_date': datetime.now() + timedelta(days=1),
        })
        self.course_fixture.add_advanced_settings({
            'enable_timed_exams': {
                'value': True
            }
        })

    def test_due_dates_not_shown(self):
        """
        Scenario: Ensure that due dates for timed exams
            are not displayed on the course outline page when switched to
            self-paced mode from instructor-paced.

        Given an instructor paced course, add a due date for a subsection.
        Change the course's pacing to self-paced.
        Make the subsection a timed exam.
        Make sure adding the timed exam doesn't display the due date.
        """
        self.course_outline_page.visit()
        section = self.course_outline_page.section(SECTION_NAME)
        subsection = section.subsection(SUBSECTION_NAME)

        modal = subsection.edit()
        modal.due_date = '5/14/2016'
        modal.policy = 'Homework'
        modal.save()
        # Checking if the added due date saved
        self.assertIn('May 14', subsection.due_date)
        # Checking if grading policy added
        self.assertEqual('Homework', subsection.policy)

        # Updating the course mode to self-paced
        self.course_fixture.add_course_details({
            'self_paced': True
        })
        # Making the subsection a timed exam
        self.course_outline_page.open_subsection_settings_dialog()
        self.course_outline_page.select_advanced_tab()
        self.course_outline_page.make_exam_timed()

        # configure call to actually update course with new settings
        self.course_fixture.configure_course()
        # Reloading page after the changes
        self.course_outline_page.visit()
        self.assertIsNone(subsection.due_date)