toBeJson() ->and('foo')->not->toBeJson() ->and('{"hello"')->not->toBeJson(); }); test('failures', function (): void { expect(':"world"}')->toBeJson(); })->throws(ExpectationFailedException::class); test('failures with custom message', function (): void { expect(':"world"}')->toBeJson('oh no!'); })->throws(ExpectationFailedException::class, 'oh no!'); test('not failures', function (): void { expect('{"hello":"world"}')->not->toBeJson(); })->throws(ExpectationFailedException::class);