public function test_create_at_MUST_be_modified_during_save() { $node = new Node(); $node->title = "Example"; $this->assertTrue($node->updated_at->is_empty); $node->save(); $now = DateTime::now()->utc; $this->assertFalse($node->created_at->is_empty); $this->assertEquals($now, $node->created_at); $node->updated_at = '-2 week'; $node->save(); $this->assertEquals($now, $node->created_at); $node->delete(); }