public void It_Does_Not_Accept_Negative_Numbers()
{
//--Arrange
var calculator = new Calculator();
var input = "8,-5";
//--Act/Assert
Assert.Throws<ArgumentException>(() => calculator.Add(input));
}
public void It_Can_Parse_Numbers_On_Different_Lines()
{
//--Arrange
var calculator = new Calculator();
var values = "5,2\n8";
//--Act
int result = calculator.Add(values);
//--Assert
Assert.AreEqual(15, result);
}
public void It_Returns_A_Sum()
{
//--Arrange
var calculator = new Calculator();
var values = "5,27";
//--Act
int result = calculator.Add(values);
//--Assert
Assert.AreEqual(32, result);
}
public void It_Supports_Custom_Delimiters()
{
//--Arrange
var calculator = new Calculator();
var input = "//;\n1;5;8";
//--Act
int result = calculator.Add(input);
//--Assert
Assert.AreEqual(14, result);
}
public void It_Says_Which_Inputs_Were_Invalid()
{
//--Arrange
var calculator = new Calculator();
var input = "-6,-15";
//--Act/Assert
Exception ex = Assert.Throws<ArgumentException>(() => calculator.Add(input));
Assert.AreEqual("negatives not allowed -6 -15", ex.Message);
}
public void It_Returns_Zero_For_Empty_String()
{
//--Arrange
var calculator = new Calculator();
//--Act
int result = calculator.Add(string.Empty);
//--Assert
Assert.AreEqual(0, result);
}
public void It_Returns_The_Number()
{
//--Arrange
var calculator = new Calculator();
var value = "5";
//--Act
int result = calculator.Add(value);
//--Assert
Assert.AreEqual(5, result);
}
