Playwright Cucumber E2e Steps Generator

Playwright Cucumber Steps Generator

Generate TypeScript step definitions and Page Object classes from Cucumber feature files for Playwright E2E testing.

Workflow Overview

1. Parse feature file → Extract scenarios and steps
2. Check existing implementations → Identify which steps need implementation
3. Determine selector strategy → Ask user: auto-detect via MCP or manual input
4. Generate Page Object → Create/update POM class with selectors and methods
5. Generate step definitions → Create step file with Given/When/Then implementations

Step 1: Parse Feature File

Read the provided .feature file and extract:

• Feature name and description
• Background steps (if any)
• All scenarios with their steps
• Step parameters (quoted strings, numbers, data tables)

// Example parsed structure
interface ParsedFeature {
  featureName: string;
  scenarios: Array<{
    name: string;
    steps: Array<{
      keyword: 'Given' | 'When' | 'Then' | 'And' | 'But';
      text: string;
      params: string[];
    }>;
  }>;
}

Step 2: Check Existing Implementations

Before generating, scan src/step_definitions/web/ for existing step patterns:

grep -r "Given\|When\|Then" src/step_definitions/web/*.ts

Report to user:

• ✅ Steps already implemented (skip these)
• ⚠️ Steps needing implementation (generate these)

Step 3: Selector Strategy Decision

Always ask user before proceeding:

Để implement các steps này, tôi cần selectors cho các elements trên trang. Bạn muốn tôi:

1. Tự động lấy - Sử dụng Playwright MCP để đọc page và tìm selectors
2. Bạn cung cấp - Bạn sẽ cho tôi selectors cho từng element

Chọn option nào?

Option 1: Auto-detect via MCP

Use read_page or find tools from Playwright MCP:

// Use find tool to locate elements
find({ query: "login button", tabId: <tabId> })
find({ query: "username input field", tabId: <tabId> })

Option 2: Manual Input

Ask user for each element needed:

Cho step "I click the login button", tôi cần selector cho:

• Login button: (nhập selector, vd: button[data-testid="login"])

Step 4: Generate Page Object

Create POM class extending BasePage. See references/page-object-template.md.

File location: src/page_objects/{page_name}_page.ts

Naming conventions:

• Class: PascalCase + Page suffix (e.g., LoginPage, DashboardPage)
• File: snake_case + _page.ts suffix
• Methods: camelCase, action-based (e.g., clickLoginButton, enterUsername)
• Selectors: private constants, descriptive names

Step 5: Generate Step Definitions

Create step definition file. See references/step-definition-template.md.

File location: src/step_definitions/web/{feature_name}_steps.ts

Patterns:

• Use Given, When, Then from @cucumber/cucumber
• Access page via this.page from World context
• Use async/await for all Playwright operations
• Include error handling with descriptive messages

Code Style Requirements

• TypeScript with strict typing
• async/await for all async operations
• Destructuring for imports and parameters
• Optional chaining (?.) and nullish coalescing (??)
• Template literals for dynamic strings
• Comments for complex logic
• Follow existing project patterns in src/support/

Project Structure Reference

src/
├── page_objects/           # POM classes extend BasePage
│   └── {page}_page.ts
├── step_definitions/
│   └── web/               # Web browser step definitions
│       └── {feature}_steps.ts
└── support/
    ├── world.ts           # Cucumber World context
    ├── helpers/           # Utility functions
    └── fixture/           # Test data (account.ts pattern)

Common Patterns

Authentication

import { getAccountCredentials } from '@support/fixture/account';
const accounts = getAccountCredentials();
const { username, password } = accounts['AccountTest'].users.admin;

Page Navigation

await this.page.goto(config.web.baseUrl);
await this.page.waitForLoadState('networkidle');

Element Interactions

await this.page.fill(selector, value);
await this.page.click(selector);
await this.page.waitForSelector(selector);

References

• Page Object Template - POM class structure and examples
• Step Definition Template - Step implementation patterns
• Common Steps - Reusable step patterns for auth, navigation, assertions

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