activitypub-testing

name	activitypub-testing
description	Testing patterns for PHPUnit and Playwright E2E tests. Use when writing tests, debugging test failures, setting up test coverage, or implementing test patterns for ActivityPub features.

ActivityPub Testing

This skill provides guidance on writing and running tests for the WordPress ActivityPub plugin.

Quick Reference

For complete testing commands and environment setup, see Testing Reference.

Key Commands

• PHP: npm run env-test
• E2E: npm run test:e2e
• JavaScript: npm run test:unit

PHPUnit Testing

Test Structure

<?php
namespace Activitypub\Tests;

use WP_UnitTestCase;

class Test_Feature extends WP_UnitTestCase {
    public function set_up(): void {
        parent::set_up();
        // Setup
    }

    public function tear_down(): void {
        // Cleanup
        parent::tear_down();
    }

    public function test_functionality() {
        // Test implementation
    }
}

Common Test Patterns

For transformer and handler testing patterns, see Testing Reference - Writing Effective Tests.

For mocking HTTP requests and other utilities, see Testing Reference - Test Utilities.

Test Groups

Use @group annotations:

/**
 * @group activitypub
 * @group federation
 */
public function test_federation_feature() {
    // Test code
}

E2E Testing with Playwright

Basic E2E Test

const { test, expect } = require('@playwright/test');

test('ActivityPub settings page loads', async ({ page }) => {
    await page.goto('/wp-admin/options-general.php?page=activitypub');
    await expect(page.locator('h1')).toContainText('ActivityPub');
});

Testing Federation

test('WebFinger discovery works', async ({ page }) => {
    const response = await page.request.get('/.well-known/webfinger', {
        params: {
            resource: 'acct:admin@localhost:8888'
        }
    });

    expect(response.ok()).toBeTruthy();
    const json = await response.json();
    expect(json.subject).toBe('acct:admin@localhost:8888');
});

Test Data Factories

For creating test data (users, posts, comments), see Testing Reference - Test Utilities.

Coverage Reports

See Testing Reference for detailed coverage generation instructions.

Debugging Tests

Debug Output

// In tests
var_dump( $data );
error_log( print_r( $result, true ) );

// Run with verbose
npm run env-test -- --verbose --debug

Isolating Tests

# Run single test method
npm run env-test -- --filter=test_specific_method

# Stop on first failure
npm run env-test -- --stop-on-failure