Question

I am working with a unit-testing suite that hijacks function calls and tests expected output values.

The normal layout requires one block of unit-testing code for each expected value.

Since my code makes use of a large number of enums, I would like to automate the automated-testing with some for loop / macro magic, and I’m looking for some advice with writing it.

Here is a block of the test code that I need to duplicate X number of times:

START_TEST("test_CallbackFn");

EXPECTED_CALLS("{{function1(param_type)#default}{function2(param_type)#default}}");

CallbackFn();

END_CALLS();
END_TEST();

Now, here is what I would envision occuring

for (int i = 0; i < 10; i++)
{
  RUN_TEST(i)
}

Now, I would like to define RUN_TEST with the code I mentioned above, except I need to replace the string default with the current value of i. What is throwing me off is the quotes and #’s that are present in the existing EXPECTED_CALLS macro.

Answer 1

I think I would look at using a separate macro processor rather than trying to beat the C preprocessor into submission. The classic example that people point to is m4, but for this, you might do better with awk or perl or python or something similar.