Test patterns

Learn common testing patterns.

Test patterns

Test patterns are templates that solve recurring test needs. The best known is setup/teardown: preparation before a test and cleanup after. This pattern keeps tests independent of each other.

setup(void) is called before the test; it prepares resources. teardown(void) is called after; it releases resources. A test function runs in between. This is the basis of the fixture mechanism in real frameworks (Unity, CMocka).

Setup/teardown skeleton

A setup function prepares resources and returns a success flag; teardown cleans up. In main the order is: setup(); test(); teardown();.

Example: int setup(void) { printf("kuruldu\n"); return 1; } and void teardown(void) { printf("yıkıldı\n"); }. Main: setup(); printf("test: tamam\n"); teardown();. Output: kuruldu, test: tamam, yıkıldı. These three lines are the minimum skeleton of a real fixture.

Exercise Setup/teardown pattern

Write int setup(void): printf("kuruldu\n"); return 1;. Write void teardown(void): printf("yıkıldı\n");. In main call in order setup();, printf("test: tamam\n");, teardown();.

Show example solution

#include <stdio.h>

int setup(void) {
    printf("kuruldu\n");
    return 1;
}

void teardown(void) {
    printf("yıkıldı\n");
}

int main(void) {
    setup();
    printf("test: tamam\n");
    teardown();
    return 0;
}

Test yourself

Match pattern steps

setup

Preparation
teardown

Cleanup
test

Running part
fixture

Skeleton
When is setup called?
- To run the test
- For post-test cleanup
- For pre-test preparation
- For the test report
Show answer

For pre-test preparation — setup prepares resources before the test.

setup return value

int setup(void) { printf("kuruldu
"); return ____; }

Show answer

int setup(void) { printf("kuruldu
"); return 1; }

Next lesson: Summary - Testing basics

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