toHaveSameSize([1]); })->throws(InvalidExpectationValue::class, 'Invalid expectation value type. Expected [countable|iterable].'); test('pass', function () { expect([1, 2, 3])->toHaveSameSize([4, 5, 6]); }); test('failures', function () { expect([1, 2, 3])->toHaveSameSize([1]); })->throws(ExpectationFailedException::class); test('failures with message', function () { expect([1, 2, 3])->toHaveSameSize([1], 'oh no!'); })->throws(ExpectationFailedException::class, 'oh no!'); test('not failures', function () { expect([1, 2, 3])->not->toHaveSameSize([1]); });