public void ShouldNotMapOverAnErr()
{
var result = new Err <int>("Value not Found");
var newRes = result.Map(i => i + 1);
Assert.IsInstanceOf <Err <int> >(newRes);
Assert.IsNotNull(newRes.ErrorMessage);
Assert.AreEqual(default(int), newRes.Value);
}
public void Map()
{
Result <int, Exception> res1 = new Ok <int, Exception>(1);
Assert.Equal(2, res1.Map(x => x + 1).Unwrap());
Result <int, Exception> res2 = new Err <int, Exception>(new Exception("this is test."));
Assert.Equal(typeof(Err <string, Exception>), res2.Map(x => $"{x + 1}").GetType());
}