use PHPUnit\Framework\ExpectationFailedException;
use PHPUnit\Framework\TestCase;
use PHPUnit\Framework\TestFailure;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpFoundation\Test\Constraint\ResponseHasHeader;
class ResponseHasHeaderTest extends TestCase
{ public function testConstraint() { $constraint =
new ResponseHasHeader('Date'
);
$this->
assertTrue($constraint->
evaluate(new Response(), '', true
));
$constraint =
new ResponseHasHeader('X-Date'
);
$this->
assertFalse($constraint->
evaluate(new Response(), '', true
));
try { $constraint->
evaluate(new Response());
} catch (ExpectationFailedException
$e) { $this->
assertEquals("Failed asserting that the Response has header \"X-Date\".\n", TestFailure::
exceptionToString($e));
return;
}