public function testQueryDateFormatter()
{
$dateFromDateTime = OpenExchangeRates::getFormattedQueryDate(DateTime::createFromFormat('Y-m-d', '2015-12-31'));
$this->assertEquals('2015-12-31', $dateFromDateTime);
$dateFromTimestamp = OpenExchangeRates::getFormattedQueryDate($time = time());
$this->assertEquals(date('Y-m-d', $time), $dateFromTimestamp);
$dateFromString = OpenExchangeRates::getFormattedQueryDate('2015-05-10');
$this->assertEquals('2015-05-10', $dateFromString);
if (!interface_exists('DateTimeInterface')) {
eval('
interface DateTimeInterface {
public function format($format);
}
class MyDate extends DateTime implements DateTimeInterface {}
');
$dateTimeImplementation = new MyDate();
$dateTimeImplementation->setTimestamp($mytime = time());
$this->assertEquals(date('Y-m-d', $mytime), OpenExchangeRates::getFormattedQueryDate($dateTimeImplementation));
}
}
