configuration.c

#include "libwatchedit/configuration.h"
#include "stdlib.h"
#include "string.h"

#define DEFAULT_CONFIGURATION_FILENAME ".watched.it.yml"

char *wit_configuration_file_path() {
  char *home_directory;
  home_directory = getenv("HOME");
  if(home_directory == NULL) {
    return NULL;
  } else {
    char *configuration_file_path;
    int configuration_file_path_length = strlen(home_directory) + strlen(DEFAULT_CONFIGURATION_FILENAME) + 1;
    configuration_file_path = (char*) malloc(configuration_file_path_length);
    if ( configuration_file_path == NULL ) {
      return NULL;
    } else {
      strcpy(configuration_file_path, home_directory);
      strcat(configuration_file_path, DEFAULT_CONFIGURATION_FILENAME);
      return configuration_file_path;
    }
  }
}

int wit_load_configuration(wit_configuration configuration) {
  set_log_context("libwatchedit.configuration.wit_load_configuration");
  char* filename;
  filename = wit_configuration_file_path();
  log_debug("Loading");
}

configuration.h

#ifndef HAVE_LIBWATCHEDIT_CONFIGURATION_H
#define HAVE_LIBWATCHEDIT_CONFIGURATION_H

#include "libwatchedit.h"

struct wit_configuration_struct {
  char *api_key;
  struct wit_server_struct *server;
};

typedef struct wit_configuration_struct *wit_configuration;

char* wit_configuration_file_path();

int wit_load_configuration(wit_configuration);

#endif

configuration_test.c

#include <stdarg.h>
#include <stddef.h>
#include <setjmp.h>
#include <google/cmockery.h>
#include "libwatchedit/configuration.h"

extern char* wit_configuration_file_path();

char* wit_configuration_file_path() {
  return (char*) mock();
}

void test_test(void **state) {
  assert_true(1);
}

void test_something_else(void **state) {
  assert_true(1);
}

void test_can_load_a_correctly_formed_configuration_file(void **state) {
  /* Stub Known Good Configuration */
  will_return(wit_configuration_file_path, "./fixtures/known_good_configuration.yml");

  wit_configuration configuration;
  assert_true(wit_load_configuration(configuration));
}

int main(int argc, char* argv[]) {
    UnitTest tests[] = {
      unit_test(test_test),
      unit_test(test_something_else),
      unit_test(test_can_load_a_correctly_formed_configuration_file)
    };
    return run_tests(tests);
}