public void RequiresNumberArrayTotalerOnInitialise()
{
// Arrange
INumberArrayTotaler totaler = null;
// Act
var validatingTotaler = new ValidatingNumberArrayTotaler(numberTotaler: totaler);
}
public void ImplementsINumberArrayTotaler()
{
// Arrange
var validatingTotaler = new ValidatingNumberArrayTotaler(_numberTotaler);
// Act
// Assert
Assert.IsTrue(validatingTotaler is INumberArrayTotaler);
}
public void TotalReturnsZeroWhenArrayIsEmpty()
{
// Arrange
var expected = 0;
var validatingTotaler = new ValidatingNumberArrayTotaler(_numberTotaler);
// Act
var actual = validatingTotaler.Total(new string[] { });
// Assert
Assert.AreEqual(expected, actual);
}
public void TotalReturnsSumOfAllNumbersInArray()
{
// Arrange
var expected = 6;
var numbers = new string[] { "1", "2", "3" };
var validatingTotaler = new ValidatingNumberArrayTotaler(_numberTotaler);
// Act
var actual = validatingTotaler.Total(numbers: numbers);
// Assert
Assert.AreEqual(expected, actual);
}
public void TotalIgnoresValuesGreaterThanOneThousandAndOne()
{
// Arrange
var expected = 1;
var numbers = new string[] { "1", "1001", "5000" };
var validatingTotaler = new ValidatingNumberArrayTotaler(_numberTotaler);
// Act
var actual = validatingTotaler.Total(numbers: numbers);
// Assert
Assert.AreEqual(expected, actual);
}
public void TotalWithArrayContainingMinusOneTwoMinusThreeThrowsException()
{
// Arrange
Exception expected = new Exception("Negatives not allowed: -1,-3");
Exception actual = null;
var totaler = new ValidatingNumberArrayTotaler(_numberTotaler);
// Act
try
{
var result = totaler.Total(new string[] { "-1", "2", "-3" });
}
catch (Exception ex)
{
actual = ex;
}
// Assert
Assert.AreEqual(expected.Message, actual.Message);
}
