/**
* Performs the actual assertion logic.
*
* If <code>$matcher</code> doesn't match <code>$actual</code>,
* throws a {@link Hamcrest\AssertionError} with a description
* of the failure along with the optional <code>$identifier</code>.
*
* @param string $identifier added to the message upon failure
* @param mixed $actual value to compare against <code>$matcher</code>
* @param \Hamcrest\Matcher $matcher applied to <code>$actual</code>
* @throws AssertionError
*/
private static function doAssert($identifier, $actual, Matcher $matcher)
{
if (!$matcher->matches($actual)) {
$description = new StringDescription();
if (!empty($identifier)) {
$description->appendText($identifier . PHP_EOL);
}
$description->appendText('Expected: ')->appendDescriptionOf($matcher)->appendText(PHP_EOL . ' but: ');
$matcher->describeMismatch($actual, $description);
throw new AssertionError((string) $description);
}
}
public function __toString()
{
return StringDescription::toString($this);
}
