public void ConvertTo_NewValue_ReturnNewSuccessResultWithNewValue()
{
// Arrange:
var oldValue = 5;
var result = new SuccessResult <int> {
Value = oldValue
};
var newValue = oldValue + 1.5;
// Act:
var newResult = result.ConvertTo(newValue);
// Assert:
var successResult = newResult.Should().BeOfType <SuccessResult <double> >().Subject;
successResult.Should().NotBeSameAs(result);
successResult.Value.Should().Be(newValue);
}