Re: Assert::IsNotNull or Assert::IsNull do not work for my C++ unit test

[email protected] wrote:

> Below is the code snippet. I got "error C2665:
> 'NUnit::Framework::Assert::IsNotNull' : none of the 3 overloads could
> convert all the argument types      ".What I did wrong?
>
> Histogram1D<T>* histoptr = new Histogram1D<T> (64);
> Assert::IsNotNull(histo, "Test object.");
> Assert::IsNull(histo, "Test object.");
>   

"new" in C++ produces pointers on the unmanaged heap, whereas 
Assert::IsNull expects a managed reference, which is produced by gcnew.  
Try this (VS 2005; syntax will differ in VS 2003):


System::Object^ myObj = gcnew System::Object();
System::Object^ nullObj = nullptr;
Assert::IsNotNull( myObj, gcnew System::String( "this one should not be 
null" ) );
Assert::IsNull( nullObj, gcnew System::String( "this one should be null" 
) );

Histogram1D<T>* histoptr = new Histogram1D<T> (64);
char* p = null;
Assert::IsFalse( null == histoptr, gcnew System::String( "new operator 
should nto return null" ));
Assert::IsTrue( null == p );


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