Sometimes on the Internet you find a programming pearl and you must share with others what you have found.
I’ve found a programming pearl here:
http://www.jera.com/techinfo/jtns/jtn002.html
The pearl is:
/* file: minunit.h */ #define mu_assert(message, test) do { if (!(test)) return message; } while (0) #define mu_run_test(test) do { char *message = test(); tests_run++; \ if (message) return message; } while (0) extern int tests_run;
Just 3 lines of clear, readable code, represent an unit test framework for C. You can use that like this:
#include <stdio.h> #include "minunit.h" int tests_run = 0; int foo = 7; int bar = 4; static char * test_foo() { mu_assert("error, foo != 7", foo == 7); return 0; } static char * test_bar() { mu_assert("error, bar != 5", bar == 5); return 0; } static char * all_tests() { mu_run_test(test_foo); mu_run_test(test_bar); return 0; } int main(int argc, char **argv) { char *result = all_tests(); if (result != 0) { printf("%s\n", result); } else { printf("ALL TESTS PASSED\n"); } printf("Tests run: %d\n", tests_run); return result != 0; }
Remember what Uncle Bob said?
You must express your problem in the chosen programming language in a manner that the language must appear to be designed exactly for the problem that you are trying to solve.
Isn’t that wonderful?