How to throw a exception after checking string.IsnullorEmpty

[Surya]

Hi ,

 

I am actually intended to write a UT  for the following code.

Private void GetVersion(){

string version=GetLatest();

if(string.IsNullOrEmpty(version))

Throw new InvalidException("Ivalid version");

 

How to write a unit test for the above code?

[Mihail]

Hi Surya,

From your post, it is not clear what you are trying to achieve with those unit tests. This is why I will assume you would like to test whether the exception will be thrown or not in case the version string is an empty string or not. Here are the two unit tests for this scenario.

 

        [TestMethod]
        [ExpectedException(typeof(InvalidOperationException))]
        public void TestMethod()
        {
            var foo = new Foo();

            Mock.NonPublic.Arrange<string>(foo, "GetLatest").Returns(string.Empty);

            var privateAccessor = Mock.NonPublic.MakePrivateAccessor(foo);
            privateAccessor.RethrowOriginalOnCallMethod = true;
            privateAccessor.CallMethod("GetVersion");
        }

        [TestMethod]
        public void TestMethod2()
        {
            var foo = new Foo();

            Mock.NonPublic.Arrange<string>(foo, "GetLatest").Returns("latest version");

            var privateAccessor = Mock.NonPublic.MakePrivateAccessor(foo);
            privateAccessor.CallMethod("GetVersion");
        }

In case this is not what you are trying to achieve please provide detailed information on your scenario.

Regards,
Mihail
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