$api->changeLeverage('BTCUSDT', 'USDT', 12)) ->not->toThrow(Exception::class); }); it('validates required parameters for change leverage', function () { $api = app(ChangeLeverageRequestContract::class); expect(fn () => $api->changeLeverage('BTCUSDT', 'USDT', 10)) ->not->toThrow(Exception::class) ->and(fn () => $api->changeLeverage('BTCUSDT', 'USDT', 0)) ->not->toThrow(Exception::class); });