NUnit Test case creation

Question

I have Created testsuits like following.

 [TestCase(12,4,3)]
 [TestCase(m,n,o)]
public void DivideTest(int n, int d, int q)
{
  Assert.AreEqual( q, n / d );
}

I have pass the variables m = 10, n = 2 and o = 5.

But the second test case is not accessible. it throws the following error. "An attribute argument must be a constant expression, typeof expression or array creation expression of an attribute parameter type"

How to pass the variables name instead of values in test case.

Have you considered [data driven tests](http://stackoverflow.com/questions/4036840/data-driven-testing-in-nunit)? — lloyd, May 14 '15 at 12:29
Take a look at the `TestCase` attribute [documentation](http://www.nunit.org/index.php?p=testCase&r=2.6.4). It only takes constants as parameters. — Thiago Sá, May 15 '15 at 00:05

score 1 · Accepted Answer · answered May 14 '15 at 12:16

1

Unfortunately, you cannot pass variables to a test case unless they are constants.

answered May 14 '15 at 12:16

Nicholas J. Markkula

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Saifur · Answer 2 · 2015-05-15T13:37:39.407

As nickmkk mentioned the variable has to be constant.

You do not need to pass the second attribute if you do not need to. In case you do, you pass same types in the test and in attribute. It will read the parameter sequentially.

[TestCase(12, 4, 3)]
[TestCase(10, 5, 1)]
public void DivideTest(int n, int d, int q)
{
  Console.WriteLine("n={0}, d={1}, q={2}", n, d, q);
  Assert.AreEqual(q, n / d);
}

print

1st run: Expected: 1 But was: 2

at NUnit.Framework.Assert.That(Object actual, IResolveConstraint expression, String message, Object[] args) at NUnit.Framework.Assert.AreEqual(Int32 expected, Int32 actual) at Test.Test.DivideTest(Int32 n, Int32 d, Int32 q) in ImplicitVsExplicitTest.cs: line 22 n=10, d=5, q=1

2nd run n=12, d=4, q=3

NUnit Test case creation

2 Answers2