def METHOD_NAME(self):
    empty_structure = get_course_blocks(self.user, self.course.location)
    assert not empty_structure
    # full_string retrieves value from collected_structure when structure is empty.
    course_data = CourseData(
        self.user, structure=empty_structure, collected_block_structure=self.collected_structure,
    )
    assert f'Course: course_key: {self.course.id}, version:' in course_data.full_string()
    # full_string returns minimal value when structures aren't readily available.
    course_data = CourseData(self.user, course_key=self.course.id)
    assert 'empty course structure' in course_data.full_string()