Jonathan de Halleux, aka Peli, never ceases to impress me with his innovations within MbUnit. In case you're not familiar with MbUnit, it's a unit testing framework similar to NUnit.
The difference is that while NUnit seems to have stagnated, Jonathan is constantly innovating new features, test fixtures, etc... for a complete unit testing solution. In fact, he's even made it so that you can run your NUnit tests within MbUnit without a recompile.
His latest feature is not necessarily a mind blower, but it's definitely will save me a lot of time writing the same type of code over and over for testing a range of values. I'll just show you a code snippet and you can figure out what it's doing for you.
[TestFixture]
public class DivisionFixture
{
[RowTest]
[Row(1000,10,100.0000)]
[Row(-1000,10,-100.0000)]
[Row(1000,7,142.85715)]
[Row(1000,0.00001,100000000)]
[Row(4195835,3145729,1.3338196)]
public void DivTest(double num, double den, double res)
{
Assert.AreEqual(res, num / den, 0.00001 );
}
}
And if you're anal like me and wondering why I chose "num" instead of "numerator" etc... Purely for blog formatting reasons. ;)
UPDATE: Jonathan points out that negative assertions are also supported. Here's an illustrative code snippet. I can't wait to try this out.
[RowTest]
[Row(1000,10,100.0000)]
...
[Row(1,0,0, ExpectedException =
typeof(ArithmeticException))]
public void DivTest(double num, double den, double res)
{...}