When you follow this process : https://netbeans.org/kb/docs/cnd/c-unit-test.html#addtest to create a test, you can read this : "The newcunittest.c file contains an automatically generated test function, testFactorial, for the factorial() function of main.c."

So, when you create a test from existing sources, the name of the test for a function factorial() is testFactorial().

However, a better way could be to start the name of test by test_ to follow the instruction of the CUnit doc (http://cunit.sourceforge.net/doc/writing_tests.html) and to be compliant with the analysis tools of Unit Tests result. The test of function factorial() will be test_factorial().

Thanks a lot,