public function test_set_post_date() { $q = self::factory()->question->create(); $question = new \WeBWorK\Server\Question($q); $new_date = '2015-05-05 05:05:05'; $question->set_post_date($new_date); $this->assertTrue($question->save()); $question2 = new \WeBWorK\Server\Question($q); $this->assertSame($new_date, $question2->get_post_date()); }