Codeception Skill

Codeception Testing Skill

Core Patterns

Acceptance Test (Cest)

amOnPage('/login');
    }

    public function loginWithValidCredentials(AcceptanceTester $I)
    {
        $I->fillField('email', 'user@test.com');
        $I->fillField('password', 'password123');
        $I->click('Login');
        $I->see('Dashboard');
        $I->seeInCurrentUrl('/dashboard');
        $I->seeElement('.welcome-message');
    }

    public function loginWithInvalidCredentials(AcceptanceTester $I)
    {
        $I->fillField('email', 'wrong@test.com');
        $I->fillField('password', 'wrong');
        $I->click('Login');
        $I->see('Invalid credentials');
        $I->seeInCurrentUrl('/login');
    }
}

Actor Methods (AcceptanceTester $I)

// Navigation
$I->amOnPage('/path');
$I->click('Button Text');
$I->click('#id');
$I->click(['xpath' => '//button']);

// Forms
$I->fillField('Name or Label', 'value');
$I->selectOption('Select', 'Option');
$I->checkOption('Checkbox');
$I->uncheckOption('Checkbox');
$I->attachFile('Upload', 'file.txt');
$I->submitForm('#form', ['email' => 'test@x.com']);

// Assertions
$I->see('Text');
$I->dontSee('Text');
$I->seeElement('#id');
$I->dontSeeElement('.error');
$I->seeInField('email', 'expected@value.com');
$I->seeInCurrentUrl('/dashboard');
$I->seeInTitle('Page Title');
$I->seeCheckboxIsChecked('#agree');
$I->seeNumberOfElements('li', 5);

// Grabbers
$text = $I->grabTextFrom('.element');
$attr = $I->grabAttributeFrom('#link', 'href');
$value = $I->grabValueFrom('#input');

Page Objects (Step Objects)

I = $I; }

    public function login(string $email, string $password): void
    {
        $this->I->amOnPage(self::$url);
        $this->I->fillField(self::$emailField, $email);
        $this->I->fillField(self::$passwordField, $password);
        $this->I->click(self::$loginButton);
    }
}

Cloud (TestMu AI)

Full setup: [reference/cloud-integration.md](reference/cloud-integration.md). Capabilities reference: [shared/testmu-cloud-reference.md](../shared/testmu-cloud-reference.md).

Cloud Config (acceptance.suite.yml)

actor: AcceptanceTester
modules:
  enabled:
    - WebDriver:
        url: 'http://localhost:3000'
        host: 'hub.lambdatest.com'
        port: 80
        browser: chrome
        capabilities:
          'LT:Options':
            user: '%LT_USERNAME%'
            accessKey: '%LT_ACCESS_KEY%'
            build: 'Codeception Build'
            video: true

Setup: composer require --dev codeception/codeception codeception/module-webdriver

Init: php vendor/bin/codecept bootstrap

Run: php vendor/bin/codecept run acceptance

Deep Patterns

See reference/playbook.md for production-grade patterns:

| Section | What You Get | |---------|-------------| | §1 Project Setup | Installation, codeception.yml, suite configurations | | §2 Acceptance Tests | Cest pattern, @dataProvider, WebDriver interactions | | §3 API Tests | REST module, CRUD operations, @depends, HttpCode | | §4 Page Objects | Page class with static selectors, reusable methods | | §5 Database Testing | haveInDatabase, seeInDatabase, updateInDatabase | | §6 Custom Helpers | Custom module extending Codeception Module | | §7 CI/CD Integration | GitHub Actions with MySQL, Selenium, coverage | | §8 Debugging Table | 12 common problems with causes and fixes | | §9 Best Practices | 14-item Codeception testing checklist |

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: LambdaTest
• Source: LambdaTest/agent-skills
• License: MIT
• Homepage: https://agentskillsforall.com/

Install and usage instructions live in the source repository linked above.