refactoring; finishing integration of CMocka; several test cases covered

test/user/create_user.c

@@ -0,0 +1,55 @@
+#include <cmocka.h>
+#include <db/db.h>
+#include <setjmp.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <main.h>
+#include <string.h>
+#include <user.h>
+
+#define UNAME "test_user"
+#define PASS "1234"
+#define EMAIL "test_user@test.com"
+
+int32_t __wrap_db_user_create(i_db_user_create *args) { return mock_type(int); }
+
+void __wrap_session_send_string(struct session *sess, const char *fmt, ...) {}
+
+/* TODO: divide into separate cases and check messages */
+
+void test_create_user(void **state) {
+  session sess = {};
+  i_db_user_create p;
+  int32_t ret = 0;
+  char line[sizeof "register" + sizeof UNAME + sizeof PASS + sizeof EMAIL + 5];
+  sprintf(line, "register %s %s %s\n", UNAME, PASS, EMAIL);
+  /* Case: success */
+  will_return(__wrap_db_user_create, 123);
+  ret = create_user(&sess, line);
+  assert_int_equal(ret, 123);
+  /* Case: username exist */
+  will_return(__wrap_db_user_create, -2);
+  ret = create_user(&sess, line);
+  assert_int_equal(ret, -2);
+  /* Case: email exist */
+  will_return(__wrap_db_user_create, -3);
+  ret = create_user(&sess, line);
+  assert_int_equal(ret, -3);
+  /* Case: error */
+  will_return(__wrap_db_user_create, -4);
+  ret = create_user(&sess, line);
+  assert_int_equal(ret, -4);
+}
+
+int setup(void **state) { return 0; }
+int tear_down(void **state) { return 0; }
+
+int main(int argc, char **argv) {
+  const struct CMUnitTest tests[] = {cmocka_unit_test(test_create_user)};
+
+  return cmocka_run_group_tests(tests, setup, tear_down);
+}