'Verify that a library content block container page preview returns the expected HTML.'

def test_library_content_preview_html(self):

    with modulestore().default_store(ModuleStoreEnum.Type.split):
        course = CourseFactory.create()
    self._add_simple_content_block()
    lc_block = self._add_library_content_block(course, self.lib_key)
    self.assertEqual(len(lc_block.children), 0)
    lc_block = self._refresh_children(lc_block)
    self.assertEqual(len(lc_block.children), 1)
    self.validate_preview_html(lc_block, self.container_view, can_add=False, can_reorder=False, can_move=False, can_edit=True, can_duplicate=False, can_delete=False)
