Unit Testing, Null, and Warnings

Question

I have a Unit Test that includes the following lines:
Dim nullarray As Integer()()
Assert.AreEqual(nullarray.ToString(False), "Nothing")
The variable "nullarray" will obviously be null when ToString is called (ToString is an extension method, which is the one I am testing). This is by design, because the purpose of this specific unit test is to make sure that my ToString extension
method handles null values the way I expect. The test runs fine, but Visual Studio 2013 gives includes the following warning:
Variable 'nullarray' is used before it has been assigned a value. A null reference exception could result at runtime.
This warning is to be expected, and I don't want to stop Visual Studio 2013 from showing this warning or any other warnings, just this specific case (and several others that involve similar scenarios). Is there any way to mark a line or segment
of code so that it is not checked for warnings? Otherwise, I will end up with lots of warnings for things that I am perfectly aware of and don't plan on changing.
Nathan Sokalski [email protected] http://www.nathansokalski.com/

Answer 1

Hi Nathan Sokalski,
Variable 'nullarray' is used before it has been assigned a value. A null reference exception could result at runtime.
Whether the warning above was thrown when you built the test project but the test run successfully? I assume Yes.
Is there any way to mark a line or segment of code so that it is not checked for warnings?
There is no built-in way to make some code snippet or a code line not be checked during compiling, but we can configure some specific warnings not to be warned during compiling in Visual Basic through project Properties->Compile
tab->warning configurations box.
For detailed information, please see: Configuring Warnings in Visual Basic
Another way is to correct your code logic and make sure the code will not generate warning at runtime.
If I misunderstood you, please tell us what code you want it not to be checked for warnings with a sample so that we can further look at your issue.
Thanks,
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