public async Task WhenCheckingBalanceAndReturnIsNullOrError_ThenThrowArgumentException()
{
//Arrange
var fixture = new Fixture();
var username = fixture.Create <string>();
var user = fixture.Create <User>();
_userServiceMock.Setup(x => x.GetUserAsync(username)).ReturnsAsync(user);
//Action
var target = new MoneyController(_currencyServiceMock.Object, _userServiceMock.Object);
var result = await target.Balance(username);
//Assert
var objectResult = result.As <ObjectResult>();
objectResult.Should().NotBeNull();
objectResult.StatusCode.Should().Be(StatusCodes.Status200OK);
}
