public void Compute_Pow2To8_Return256()
{
ReversePolishCalculator.Compute("2 8 pow").Should().Be(256);
}
public void Compute_InvalidExpression2_ThrowsException()
{
Action act = () => ReversePolishCalculator.Compute("+ 1");
act.Should().Throw <ArgumentException>();
}
public void Compute_512Plus4TimesPlus3Minus_Return14()
{
ReversePolishCalculator.Compute("5 1 2 + 4 * + 3 -").Should().Be(14);
}
public void Compute_Sqrt16_Return4()
{
ReversePolishCalculator.Compute("16 sqrt").Should().Be(4);
}
public void Compute_WithDivisionOfTwoNumbers_ReturnTheQuotient()
{
ReversePolishCalculator.Compute("10 5 /").Should().Be(2);
}
public void Compute_WithNumberRaisedToExponent_ReturnThePower()
{
ReversePolishCalculator.Compute("10 5 ^").Should().Be(100000);
}
public void Compute_WithSubstractionOfTwoNumbers_ReturnTheDifference()
{
ReversePolishCalculator.Compute("7 5 -").Should().Be(2);
}
public void Compute_WithMultiplicationOfTwoNumbers_ReturnTheProduct()
{
ReversePolishCalculator.Compute("7 5 *").Should().Be(35);
}
public void Compute_WithAdditionOfTwoNumbers_ReturnTheSum()
{
ReversePolishCalculator.Compute("7 5 +").Should().Be(12);
}
public void Compute_WithSingleNumber_ReturnTheNumber()
{
ReversePolishCalculator.Compute("7").Should().Be(7);
}
public void Compute_WithNullString_ReturnZero()
{
ReversePolishCalculator.Compute(null).Should().Be(0);
}
public void Compute_WithEmptyString_ReturnZero()
{
ReversePolishCalculator.Compute("").Should().Be(0);
}
// Helper methods
// to make the tests more readable
private int Calculate(string expression)
{
return(ReversePolishCalculator.Compute(ShuntingYard.Parse(expression)));
}