toBeEmpty() ->and(null)->toBeEmpty(); }); test('failures', function (): void { expect([1, 2])->toBeEmpty() ->and(' ')->toBeEmpty(); })->throws(ExpectationFailedException::class); test('failures with custom message', function (): void { expect([1, 2])->toBeEmpty('oh no!') ->and(' ')->toBeEmpty('oh no!'); })->throws(ExpectationFailedException::class, 'oh no!'); test('not failures', function (): void { expect([])->not->toBeEmpty() ->and(null)->not->toBeEmpty(); })->throws(ExpectationFailedException::class);