Comment by vortico

Why not just 1 line? Of course, the application will halt after one test fails, but some people like it this way.

    #include <assert.h>

Usage:

    void test_foo() {
        assert(foo() == 4 /* foo should be 4 */);
    }

Output would be something like

    Assertion failed at "foo() == 4 /* foo should be 4 */"

If you run the application in a debugger like GDB, you can see the frame when the abort trap is called.