toHaveCount(3); }); test('failures', function () { expect([1, 2, 3])->toHaveCount(4); })->throws(ExpectationFailedException::class); test('failures with message', function () { expect([1, 2, 3])->toHaveCount(4, 'oh no!'); })->throws(ExpectationFailedException::class, 'oh no!'); test('not failures', function () { expect([1, 2, 3])->not->toHaveCount(3); })->throws(ExpectationFailedException::class);