'Adds unpublished HTML content to first three units in the course.'

def _add_unpublished_content(self):

    for index in xrange(3):
        self.course_fixture.create_xblock(self.course_fixture.get_nested_xblocks(category='vertical')[index].locator, XBlockFixtureDesc('html', ('Unpublished    HTML    Component    ' + str(index))))
