When unit testing a service, I tend to have a base class where I do all the setting up/initialisation. For each method in the service, I’d have a separate unit test class which derives from the base class. For example, if I want to unit test two methods GetAllNews and GetNewsById in SampleNewsService, I’ll have a SampleNewsServiceTestsBase … [Read more…]
When unit testing for null or white space string variable, I often find myself writing the same unit test 3 times but with different input for the string parameter.
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public class Sample { public static void RequiredStringParameter(string stringParam) { if (string.IsNullOrWhiteSpace(stringParam)) { throw new ArgumentException($"{nameof(stringParam)} is required."); } // Logics go here } } [TestFixture] public class SampleTests { [Test] public void Test_Null_StringParam_Should_Throw_Exception() { Assert.Throws<ArgumentException>(() => Sample.RequiredStringParameter(null)); } [Test] public void Test_Empty_StringParam_Should_Throw_Exception() { Assert.Throws<ArgumentException>(() => Sample.RequiredStringParameter(string.Empty)); } [Test] public void Test_WhiteSpace_StringParam_Should_Throw_Exception() { Assert.Throws<ArgumentException>(() => Sample.RequiredStringParameter(" ")); } } |
Recently, I find a neat way to avoid having to write duplicate tests when testing the same behaviour with different inputs. NUnit test has the Values … [Read more…]