Comment by bjourne

I write unit tests for my C code all that time. It's not difficult if you use a good build system and if you are willing to stomach some boilerplate. Here is one test from my "test suite" for my npy library:

    void
    test_load_uint8() {
        npy_arr *arr = npy_load("tests/npy/uint8.npy");
        assert(arr->n_dims == 1);
        assert(arr->dims[0] == 100);
        assert(arr->type == 'u');
        npy_free(arr);
    }
    int
    main(int argc, char *argv[]) {
        PRINT_RUN(test_load_uint8);
        ...
    }

I know I could have some pre-processor generate parts of the tests, but I prefer to KISS.