/**
* @param ExerciseInterface $exercise
* @return ExerciseInterface
*/
private function validateExercise(ExerciseInterface $exercise)
{
$type = $exercise->getType();
$requiredInterface = $type->getExerciseInterface();
if (!$exercise instanceof $requiredInterface) {
throw InvalidArgumentException::missingImplements($exercise, $requiredInterface);
}
return $exercise;
}
public function testExceptionFromMissingImplements()
{
$e = InvalidArgumentException::missingImplements(new \stdClass(), Countable::class);
self::assertEquals('"stdClass" is required to implement "Countable", but it does not', $e->getMessage());
}
