Add back missing 'New Post" button

TNL-1097

common/test/acceptance/pages/lms/discussion.py

@@ -552,3 +552,25 @@ class DiscussionTabHomePage(CoursePage, DiscussionPageMixin):
             lambda: _match_messages(text).results == [],
             "waiting for dismissed alerts to disappear"
         ).fulfill()
+
+    def click_new_post_button(self):
+        """
+        Clicks the 'New Post' button.
+        """
+        self.new_post_button.click()
+        EmptyPromise(
+            lambda: (
+                self.new_post_form
+            ),
+            "New post action succeeded"
+        ).fulfill()
+
+    @property
+    def new_post_button(self):
+        elements = self.q(css="ol.course-tabs .new-post-btn")
+        return elements.first if elements.visible and len(elements) == 1 else None
+
+    @property
+    def new_post_form(self):
+        elements = self.q(css=".forum-new-post-form")
+        return elements[0] if elements.visible and len(elements) == 1 else None

common/test/acceptance/tests/discussion/test_discussion.py

@@ -111,6 +111,33 @@ class DiscussionResponsePaginationTestMixin(BaseDiscussionMixin):
         self.assertFalse(self.thread_page.has_add_response_button())
 
 
+@attr('shard_1')
+class DiscussionHomePageTest(UniqueCourseTest):
+    """
+    Tests for the discussion home page.
+    """
+
+    SEARCHED_USERNAME = "gizmo"
+
+    def setUp(self):
+        super(DiscussionHomePageTest, self).setUp()
+        CourseFixture(**self.course_info).install()
+        AutoAuthPage(self.browser, course_id=self.course_id).visit()
+        self.page = DiscussionTabHomePage(self.browser, self.course_id)
+        self.page.visit()
+
+    def test_new_post_button(self):
+        """
+        Scenario: I can create new posts from the Discussion home page.
+            Given that I am on the Discussion home page
+            When I click on the 'New Post' button
+            Then I should be shown the new post form
+        """
+        self.assertIsNotNone(self.page.new_post_button)
+        self.page.click_new_post_button()
+        self.assertIsNotNone(self.page.new_post_form)
+
+
 @attr('shard_1')
 class DiscussionTabSingleThreadTest(UniqueCourseTest, DiscussionResponsePaginationTestMixin):
     """

lms/templates/courseware/course_navigation.html

@@ -78,6 +78,7 @@ def url_class(is_active):
              </a>
           </li>
       % endfor
+      <%block name="extratabs" />
     </ol>
   </div>
 </nav>