public void handle_if_two_values_already_is_supplied()
{
var x = new AddNumberEngine();
x.Input("3");
x.Input("6");
ExpectException(AddNumberEngine.Error.AlreadyHaveTwoValues, () => x.Input("9"));
int result = x.Result();
Assert.AreEqual(3 + 4 + 5 + 6, result);
}
public void should_add_numbers_between_three_and_six()
{
// (happy path)
var x = new AddNumberEngine();
x.Input("3");
x.Input("6");
int result = x.Result();
Assert.AreEqual(3 + 4 + 5 + 6, result);
}
public void handle_if_second_value_is_lower_than_the_first_number()
{
var x = new AddNumberEngine();
x.Input("3");
ExpectException(AddNumberEngine.Error.SecondValueCantBeLowerThanFirst, () => x.Input("2"));
x.Input("6");
int result = x.Result();
Assert.AreEqual(3 + 4 + 5 + 6, result);
}
public void handle_if_result_is_called_too_early()
{
var x = new AddNumberEngine();
ExpectException(AddNumberEngine.Error.DontHaveTwoValues, () => x.Result());
x.Input("3");
ExpectException(AddNumberEngine.Error.DontHaveTwoValues, () => x.Result());
x.Input("6");
int result = x.Result();
Assert.AreEqual(3 + 4 + 5 + 6, result);
}
public void should_handle_inputs_that_are_not_number()
{
var x = new AddNumberEngine();
ExpectException(AddNumberEngine.Error.InputIsNotNumber, () => x.Input(null));
ExpectException(AddNumberEngine.Error.InputIsNotNumber, () => x.Input(""));
ExpectException(AddNumberEngine.Error.InputIsNotNumber, () => x.Input("a"));
x.Input("3");
ExpectException(AddNumberEngine.Error.InputIsNotNumber, () => x.Input("b"));
x.Input("6");
ExpectException(AddNumberEngine.Error.InputIsNotNumber, () => x.Input("c"));
ExpectException(AddNumberEngine.Error.InputIsNotNumber, () => x.Input(null));
int result = x.Result();
Assert.AreEqual(3 + 4 + 5 + 6, result);
}
