edx-platform/xmodule/tests/test_word_cloud.py

"""Test for Word Cloud Block functional logic."""
import json
from unittest.mock import Mock

from django.conf import settings
from django.test import TestCase
from django.test import override_settings
from fs.memoryfs import MemoryFS
from lxml import etree
from opaque_keys.edx.locator import BlockUsageLocator, CourseLocator
from webob import Request
from webob.multidict import MultiDict
from xblock.field_data import DictFieldData
from xblock.fields import ScopeIds

from xmodule import word_cloud_block
from . import get_test_descriptor_system, get_test_system


class _TestWordCloudBase(TestCase):
    """
    Logic tests for Word Cloud Block.
    """
    __test__ = False

    @classmethod
    def setUpClass(cls):
        super().setUpClass()
        cls.word_cloud_class = word_cloud_block.reset_class()

    def setUp(self):
        super().setUp()
        self.raw_field_data = {
            'all_words': {'cat': 10, 'dog': 5, 'mom': 1, 'dad': 2},
            'top_words': {'cat': 10, 'dog': 5, 'dad': 2},
            'submitted': False,
            'display_name': 'Word Cloud Block',
            'instructions': 'Enter some random words that comes to your mind'
        }

    def test_xml_import_export_cycle(self):
        """
        Test the import export cycle.
        """
        runtime = get_test_descriptor_system()
        runtime.export_fs = MemoryFS()

        original_xml = (
            '<word_cloud display_name="Favorite Fruits" display_student_percents="false" '
            'instructions="What are your favorite fruits?" num_inputs="3" num_top_words="100"/>\n'
        )

        olx_element = etree.fromstring(original_xml)
        runtime.id_generator = Mock()

        def_id = runtime.id_generator.create_definition(olx_element.tag, olx_element.get('url_name'))
        keys = ScopeIds(None, olx_element.tag, def_id, runtime.id_generator.create_usage(def_id))
        block = self.word_cloud_class.parse_xml(olx_element, runtime, keys)

        block.location = BlockUsageLocator(
            CourseLocator('org', 'course', 'run', branch='revision'), 'word_cloud', 'block_id'
        )

        assert block.display_name == 'Favorite Fruits'
        assert not block.display_student_percents
        assert block.instructions == 'What are your favorite fruits?'
        assert block.num_inputs == 3
        assert block.num_top_words == 100

        node = etree.Element("unknown_root")
        # This will export the olx to a separate file.
        block.add_xml_to_node(node)

        with runtime.export_fs.open('word_cloud/block_id.xml') as f:
            exported_xml = f.read()

        assert exported_xml == original_xml

    def test_bad_ajax_request(self):
        """
        Make sure that answer for incorrect request is error json.
        """
        module_system = get_test_system()
        block = self.word_cloud_class(module_system, DictFieldData(self.raw_field_data), Mock())

        if settings.USE_EXTRACTED_WORD_CLOUD_BLOCK:
            # The extracted Word Cloud XBlock uses @XBlock.json_handler for handling AJAX requests,
            # which requires a different way of method invocation.
            with self.assertRaises(AttributeError) as context:
                json.loads(block.bad_dispatch('bad_dispatch', {}))
            self.assertIn("'WordCloudBlock' object has no attribute 'bad_dispatch'", str(context.exception))
        else:
            response = json.loads(block.handle_ajax('bad_dispatch', {}))
            self.assertDictEqual(response, {
                'status': 'fail',
                'error': 'Unknown Command!'
            })

    def test_good_ajax_request(self):
        """
        Make sure that ajax request works correctly.
        """
        module_system = get_test_system()
        block = self.word_cloud_class(module_system, DictFieldData(self.raw_field_data), Mock())

        if settings.USE_EXTRACTED_WORD_CLOUD_BLOCK:
            # The extracted Word Cloud XBlock uses @XBlock.json_handler for handling AJAX requests.
            # It expects a standard Python dictionary as POST data and returns a JSON object in response.
            post_data = {'student_words': ['cat', 'cat', 'dog', 'sun']}
            response = block.submit_state(post_data)
        else:
            post_data = MultiDict(('student_words[]', word) for word in ['cat', 'cat', 'dog', 'sun'])
            response = json.loads(block.handle_ajax('submit', post_data))
        assert response['status'] == 'success'
        assert response['submitted'] is True
        assert response['total_count'] == 22
        self.assertDictEqual(
            response['student_words'],
            {'sun': 1, 'dog': 6, 'cat': 12}
        )

        self.assertListEqual(
            response['top_words'],
            [{'text': 'cat', 'size': 12, 'percent': 55.0},
             {'text': 'dad', 'size': 2, 'percent': 9.0},
             {'text': 'dog', 'size': 6, 'percent': 27.0},
             {'text': 'mom', 'size': 1, 'percent': 5.0},
             {'text': 'sun', 'size': 1, 'percent': 4.0}]
        )

        assert 100.0 == sum(i['percent'] for i in response['top_words'])

    def test_indexibility(self):
        """
        Test indexibility of Word Cloud
        """
        module_system = get_test_system()
        block = self.word_cloud_class(module_system, DictFieldData(self.raw_field_data), Mock())
        assert block.index_dictionary() ==\
               {'content_type': 'Word Cloud',
                'content': {'display_name': 'Word Cloud Block',
                            'instructions': 'Enter some random words that comes to your mind'}}

    def test_studio_submit_handler(self):
        """
        Test studio_submint handler
        """
        TEST_SUBMIT_DATA = {
            'display_name': "New Word Cloud",
            'instructions': "This is a Test",
            'num_inputs': 5,
            'num_top_words': 10,
            'display_student_percents': 'False',
        }
        if settings.USE_EXTRACTED_WORD_CLOUD_BLOCK:
            # In the extracted Word Cloud XBlock, we use StudioEditableXBlockMixin.submit_studio_edits,
            # which expects a different handler name and request JSON format.
            handler_name = 'submit_studio_edits'
            TEST_REQUEST_JSON = {
                'values': TEST_SUBMIT_DATA,
            }
        else:
            handler_name = 'studio_submit'
            TEST_REQUEST_JSON = TEST_SUBMIT_DATA
        module_system = get_test_system()
        block = self.word_cloud_class(module_system, DictFieldData(self.raw_field_data), Mock())
        body = json.dumps(TEST_REQUEST_JSON)
        request = Request.blank('/')
        request.method = 'POST'
        request.body = body.encode('utf-8')
        res = block.handle(handler_name, request)
        assert json.loads(res.body.decode('utf8')) == {'result': 'success'}

        assert block.display_name == TEST_SUBMIT_DATA['display_name']
        assert block.instructions == TEST_SUBMIT_DATA['instructions']
        assert block.num_inputs == TEST_SUBMIT_DATA['num_inputs']
        assert block.num_top_words == TEST_SUBMIT_DATA['num_top_words']
        assert block.display_student_percents == (TEST_SUBMIT_DATA['display_student_percents'] == "True")


@override_settings(USE_EXTRACTED_WORD_CLOUD_BLOCK=True)
class TestWordCloudExtracted(_TestWordCloudBase):
    __test__ = True


@override_settings(USE_EXTRACTED_WORD_CLOUD_BLOCK=False)
class TestWordCloudBuiltIn(_TestWordCloudBase):
    __test__ = True