public void Try_Should_ResolveFilterToTry(bool delivery, int expected)
{
var actual = MonadUtilities
.ReturnTry(new AddressStub("Some street", 13))
.Map(x => new CustomerStub("Some customer", x))
.Execute(x => x.Addresses.Add(new AddressStub("Some other street", 14, delivery)))
.Map(x => x.Addresses.ToList())
.Filter(x => x.Any(a => a.Delivery))
.Map(x => x.Count)
.GetValue();
Assert.Equal(expected, actual);
}
/// <inheritdoc/>
public override ITry <TResult> Map <TResult>(Func <T, TResult> mapper)
{
if (mapper == null)
{
return(new Failure <TResult>(new ArgumentNullException(nameof(mapper), $"{nameof(mapper)} not defined")));
}
try
{
return(MonadUtilities.ReturnTry(mapper(Value)));
}
catch (Exception ex)
{
return(new Failure <TResult>(ex));
}
}
public void Try_Should_RecoverFromInvalidOperationException()
{
const int expected = 16;
var actual = MonadUtilities
.ReturnTry(new AddressStub("Some street", 13))
.Map(x => new CustomerStub("Some customer", x))
.Map(x => x.Addresses.ToList())
.Recover <ArgumentException>(x => new List <AddressStub> {
new AddressStub(x.Message, 14, true)
})
.Map(x => x.Single(a => a.Delivery))
.Recover <ArgumentException>(x => new AddressStub(nameof(ArgumentException) + x.Message, 15))
.Recover <InvalidOperationException>(x => new AddressStub(nameof(InvalidOperationException) + x.Message, expected))
.Recover <Exception>(x => new AddressStub(nameof(InvalidOperationException) + x.Message, 17))
.Map(x => x.Number)
.GetValue();
Assert.Equal(expected, actual);
}
public void Try_Should_RecoverFromArgumentException(int number, bool equal)
{
const string expected = "Customer1";
var actual = MonadUtilities
.ReturnTry(number)
.Map(x => x - 12)
.Map(x => new AddressStub("Some street", x))
.Map(x => new CustomerStub(expected, x))
.Recover <ArgumentException>(x => new CustomerStub(x.Message))
.Map(x => x.Name)
.GetValue();
if (equal)
{
Assert.Equal(expected, actual);
}
else
{
Assert.NotEqual(expected, actual);
}
}