Is it possible to parameterize a nunit test

c# nunit
NewNetProgrammer picture NewNetProgrammer · Jan 27, 2011 · Viewed 36.6k times · Source

I would like to write a callable function that accepts two objects, and compares 30+ properties of those objects with asserts. The issue is this needs to be done for about 20 existing unit tests and most future tests, and writing out the 30+ asserts each time is both time and space consuming.

I currently have a non unit test function that compares the objects, and returns a string with "pass" or a failure message, and use an assert to validate that in each unit test. However, its quite messy and I feel like I'm going against proper unit testing methods.

Is there a way to make a function that is callable from inside unit tests that uses asserts to check conditions?

Answer

stack72 picture stack72 · Jan 27, 2011

If you are using NUnit 2.5.5 or above, this is possible using the TestCase attribute.

Normal unit tests would be decorated with [Test], but we can replace that as follows:

[TestCase("0", 1)]
[TestCase("1", 1)]
[TestCase("2", 1)]
public void UnitTestName(string input, int expected)
{
    //Arrange

    //Act

    //Assert
}

That type of thing will be the way to do it - obviously take different params.

Look at this for help: http://nunit.org/?p=testCase&r=2.5

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