Row based testing in MbUnit (i.e. RowFixture)

This new functionality enables you to specify a tabular list of test cases that are to be feeded to the test method. It can be illustrated with the floating point division testing (as in the FIT framework Simple Example ):

numerator	denominator	quotient()
1000	10	100.0000
-1000	10	-100.0000
1000	7	142.85715
1000	.00001	100000000
4195835	3145729	1.3338196

You can now translate this directly to C# in MbUnit using the RowTestAttribute and the RowAttribute:

[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 numerator, double denominator, double result)
    {
        Assert.AreEqual(result, numerator / denominator, 0.00001 );
    }
}

Of course, these tests are not very well targeted because we do not test the “special” floating point values such as 1,0,double.MaxValue, double.MinValue, NaN but you get the picture.

What if a test should throw ? In that case, you can specify the exception type as an additional parameter in the RowAttribute constructor:

    [Row(1,0,0, ExpectedException = typeof(ArithmeticException))]
    public void DivTest(double numerator, double denominator, double result)
    {...}

The final output of the tests is as follows where you can see that 5 tests (one per row) were generated and executed.

Info: Found 5 tests
Info: [assembly-setup] success
Info: [success] RowTestDemo.DivTest(0)
Info: [success] RowTestDemo.DivTest(1)
Info: [success] RowTestDemo.DivTest(2)
Info: [success] RowTestDemo.DivTest(3)
Info: [success] RowTestDemo.DivTest(4)
Info: [assembly-teardown] success
Info: [reports] generating HTML report