UtilsTest::testDateFormats PHP Method

    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]));
        }
    }