public function testDateFormats() { $dateFormats = Utils::dateFormats(); $this->assertTrue(is_array($dateFormats)); $this->assertContainsOnly('string', $dateFormats); $default_format = $this->grav['config']->get('system.pages.dateformat.default'); if ($default_format !== null) { $this->assertTrue(isset($dateFormats[$default_format])); } }