e2e-outside-in-test-generator

Generates comprehensive end-to-end Playwright tests using outside-in methodology

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Repository: diegosouzapw/awesome-omni-skill
Last source activity: February 28, 2026 at 04:08
Detected SKILL.md language: English
Stars: 50
Forks: 19

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name	e2e-outside-in-test-generator
version	1.0.0
description	Generates comprehensive end-to-end Playwright tests using outside-in methodology
activation_keywords	["add e2e tests","add playwright tests","add browser tests","add outside-in tests","generate e2e suite"]
category	testing
requires	["Frontend framework (Next.js, React, Vue, Angular)","Backend API"]
invokes	["test-gap-analyzer (test coverage analysis)","shadow-testing (parallel test execution)","outside-in-testing (methodology validation)"]
output_location	e2e/

E2E Outside-In Test Generator

Automatically generates comprehensive end-to-end Playwright tests for full-stack applications using outside-in testing methodology. Generates 40+ tests across 7 categories, finds real bugs, and validates through iterative fix loops.

LEVEL 1: Quick Start

Purpose

This skill analyzes your full-stack application and generates a complete Playwright test suite that:

Validates user journeys from browser through backend
Finds real bugs through systematic exploration
Runs deterministically with no flakiness
Integrates with CI out of the box

When to Use

Activate this skill when you:

Need comprehensive browser testing for a full-stack app
Want to validate critical user flows end-to-end
Need regression coverage before major refactoring
Are preparing for production deployment

Requirements: Your project must have both a frontend (Next.js, React, Vue, Angular) and backend API.

Quick Start

# In your project root
$ claude

> add e2e tests

The skill automatically:

Analyzes your application (routes, API endpoints, database schema)
Sets up infrastructure (Playwright config, test helpers, seed data)
Generates 40+ tests across 7 categories
Runs tests and fixes failures (up to 5 iterations)
Reports coverage and recommendations

Expected Output

e2e/
├── playwright.config.ts          # Playwright configuration
├── test-helpers/
│   ├── auth.ts                   # Authentication helpers
│   ├── navigation.ts             # Navigation helpers
│   ├── assertions.ts             # Custom assertions
│   └── data-setup.ts             # Test data management
├── fixtures/
│   ├── users.json                # Test user data
│   ├── products.json             # Test product data
│   └── seed.sql                  # Database seed script
├── happy-path/
│   ├── user-registration.spec.ts
│   ├── user-login.spec.ts
│   └── checkout-flow.spec.ts
├── edge-cases/
│   ├── invalid-inputs.spec.ts
│   └── boundary-conditions.spec.ts
├── error-handling/
│   ├── network-failures.spec.ts
│   └── validation-errors.spec.ts
├── performance/
│   ├── page-load-times.spec.ts
│   └── api-response-times.spec.ts
├── security/
│   ├── unauthorized-access.spec.ts
│   └── xss-protection.spec.ts
├── accessibility/
│   ├── keyboard-navigation.spec.ts
│   └── screen-reader.spec.ts
└── integration/
    ├── database-persistence.spec.ts
    └── api-integration.spec.ts

Total: 42 tests across 7 categories

# Run all tests
npx playwright test

# Run specific category
npx playwright test e2e/happy-path

# Run in headed mode
npx playwright test --headed

# Run in debug mode
npx playwright test --debug

graph LR
    A[Phase 1: Analysis] --> B[Phase 2: Infrastructure]
    B --> C[Phase 3: Generation]
    C --> D[Phase 4: Fix Loop]
    D --> E[Phase 5: Coverage Audit]

StackConfig(
    frontend_framework="nextjs",
    frontend_dir="app/",
    backend_framework="fastapi",
    api_base_url="http://localhost:8000/api",
    database_type="postgresql",
    auth_mechanism="jwt",
    routes=[
        Route(path="/", component="Home"),
        Route(path="/login", component="Login"),
        Route(path="/products", component="ProductList"),
        Route(path="/products/:id", component="ProductDetail"),
        Route(path="/checkout", component="Checkout")
    ],
    api_endpoints=[
        APIEndpoint(path="/auth/login", method="POST"),
        APIEndpoint(path="/auth/register", method="POST"),
        APIEndpoint(path="/products", method="GET"),
        APIEndpoint(path="/products/:id", method="GET"),
        APIEndpoint(path="/orders", method="POST")
    ],
    models=[
        Model(name="User", fields=["id", "email", "password"]),
        Model(name="Product", fields=["id", "name", "price", "stock"]),
        Model(name="Order", fields=["id", "user_id", "product_id", "quantity"])
    ]
)

// e2e/playwright.config.ts
import { defineConfig, devices } from "@playwright/test";

export default defineConfig({
  testDir: "./e2e",
  fullyParallel: false, // CRITICAL: workers=1 for deterministic test data
  forbidOnly: !!process.env.CI,
  retries: process.env.CI ? 2 : 0,
  workers: 1, // NEVER > 1 to prevent data races
  reporter: "html",
  use: {
    baseURL: "http://localhost:3000",
    trace: "on-first-retry",
  },
  projects: [{ name: "chromium", use: { ...devices["Desktop Chrome"] } }],
  webServer: {
    command: "npm run dev",
    url: "http://localhost:3000",
    reuseExistingServer: !process.env.CI,
  },
});

// e2e/test-helpers/auth.ts
export async function login(page: Page, email: string, password: string) {
  await page.goto("/login");
  await page.getByRole("textbox", { name: /email/i }).fill(email);
  await page.getByRole("textbox", { name: /password/i }).fill(password);
  await page.getByRole("button", { name: /sign in/i }).click();
  await page.waitForURL("/dashboard");
}

export async function logout(page: Page) {
  await page.getByRole("button", { name: /logout/i }).click();
  await page.waitForURL("/");
}

// e2e/fixtures/users.json
[
  {
    "email": "test@example.com",
    "password": "Test123!", // pragma: allowlist secret
    "name": "Test User",
    "role": "customer"
  },
  {
    "email": "admin@example.com",
    "password": "Admin123!", // pragma: allowlist secret
    "name": "Admin User",
    "role": "admin"
  }
]

// e2e/happy-path/user-registration.spec.ts
import { test, expect } from "@playwright/test";

test("user can register with valid credentials", async ({ page }) => {
  await page.goto("/register");

  await page.getByRole("textbox", { name: /email/i }).fill("newuser@example.com");
  await page.getByRole("textbox", { name: /password/i }).fill("Password123!");
  await page.getByRole("textbox", { name: /confirm password/i }).fill("Password123!");
  await page.getByRole("button", { name: /create account/i }).click();

  await expect(page).toHaveURL("/dashboard");
  await expect(page.getByText(/welcome/i)).toBeVisible();
});

// e2e/edge-cases/boundary-conditions.spec.ts
test("rejects password that is too short", async ({ page }) => {
  await page.goto("/register");

  await page.getByRole("textbox", { name: /email/i }).fill("test@example.com");
  await page.getByRole("textbox", { name: /password/i }).fill("123"); // Too short
  await page.getByRole("button", { name: /create account/i }).click();

  await expect(page.getByText(/password must be at least 8 characters/i)).toBeVisible();
});

// e2e/error-handling/network-failures.spec.ts
test("shows error when API is unavailable", async ({ page, context }) => {
  // Simulate network failure
  await context.route("**/api/**", (route) => route.abort());

  await page.goto("/products");

  await expect(page.getByText(/unable to load products/i)).toBeVisible();
  await expect(page.getByRole("button", { name: /retry/i })).toBeVisible();
});

// e2e/performance/page-load-times.spec.ts
test("homepage loads in under 2 seconds", async ({ page }) => {
  const startTime = Date.now();
  await page.goto("/");
  await page.waitForLoadState("networkidle");
  const loadTime = Date.now() - startTime;

  expect(loadTime).toBeLessThan(2000);
});

// e2e/security/unauthorized-access.spec.ts
test("redirects unauthenticated users from protected routes", async ({ page }) => {
  await page.goto("/dashboard");

  await expect(page).toHaveURL("/login");
  await expect(page.getByText(/please sign in/i)).toBeVisible();
});

// e2e/accessibility/keyboard-navigation.spec.ts
import { test, expect } from "@playwright/test";

test("login form is fully keyboard accessible", async ({ page }) => {
  await page.goto("/login");

  await page.keyboard.press("Tab"); // Focus email
  await page.keyboard.type("test@example.com");
  await page.keyboard.press("Tab"); // Focus password
  await page.keyboard.type("Test123!");
  await page.keyboard.press("Tab"); // Focus submit button
  await page.keyboard.press("Enter"); // Submit form

  await expect(page).toHaveURL("/dashboard");
});

// e2e/integration/database-persistence.spec.ts
test("product order persists across sessions", async ({ page, context }) => {
  // Create order
  await login(page, "test@example.com", "Test123!");
  await page.goto("/products/123");
  await page.getByRole("button", { name: /add to cart/i }).click();
  await page.goto("/checkout");
  await page.getByRole("button", { name: /place order/i }).click();

  const orderNumber = await page.getByText(/order #\d+/).textContent();

  // Logout and login again
  await logout(page);
  await login(page, "test@example.com", "Test123!");

  // Verify order exists
  await page.goto("/orders");
  await expect(page.getByText(orderNumber!)).toBeVisible();
});

// Before: Flaky locator
await page.click(".submit-button");

// After: Role-based locator
await page.getByRole("button", { name: /submit/i }).click();

// Before: Race condition
await page.click("#login");
await page.fill("#email", "test@example.com");

// After: Wait for navigation
await page.click("#login");
await page.waitForLoadState("networkidle");
await page.fill("#email", "test@example.com");

// Before: Hardcoded data
await page.fill("#quantity", "5");

// After: Dynamic data from fixtures
const product = await getTestProduct();
await page.fill("#quantity", product.minQuantity.toString());

Iteration 1: 42 tests, 8 failures
  - Fixed 5 locator issues
  - Fixed 2 timing issues
  - Fixed 1 data issue

Iteration 2: 42 tests, 3 failures
  - Fixed 2 locator issues
  - Fixed 1 timing issue

Iteration 3: 42 tests, 0 failures ✓

Fix loop completed in 3 iterations.

## Test Coverage Report

### Tests Generated: 42

- Happy Path: 12 tests
- Edge Cases: 8 tests
- Error Handling: 6 tests
- Performance: 4 tests
- Security: 5 tests
- Accessibility: 4 tests
- Integration: 3 tests

### Routes Covered: 12/15 (80%)

Uncovered routes:

- /admin/settings (requires admin role)
- /api/webhooks/\* (external integrations)
- /debug/\* (development-only)

### API Endpoints Covered: 18/22 (82%)

Uncovered endpoints:

- POST /api/admin/users (admin-only)
- DELETE /api/products/:id (soft delete, needs verification)
- GET /api/analytics (complex aggregations)
- POST /api/webhooks/stripe (external trigger)

### Bugs Found: 2

1. **CRITICAL**: Login form allows SQL injection via email field
   - Location: app/login/page.tsx:45
   - Test: e2e/security/sql-injection.spec.ts

2. **MEDIUM**: Checkout fails with international phone numbers
   - Location: lib/validation.ts:12
   - Test: e2e/edge-cases/international-phone.spec.ts

### Recommendations

1. Add admin-role tests (requires admin user setup)
2. Add webhook integration tests (requires test webhook server)
3. Add load testing for high-traffic endpoints
4. Increase accessibility coverage (current: 9%, target: 15%)

// e2e/playwright.config.ts
export default defineConfig({
  use: {
    // Prioritize test IDs
    testIdAttribute: "data-testid",
  },
});

# Add custom category during generation
custom_categories = [
    "happy-path",
    "edge-cases",
    "error-handling",
    "performance",
    "security",
    "accessibility",
    "integration",
    "custom-business-rules"  # Your custom category
]

// e2e/fixtures/custom-data.json
{
  "scenarios": [
    {
      "name": "bulk-order",
      "users": [...],
      "products": [...],
      "expected_discount": 0.15
    }
  ]
}

# .env.test
DATABASE_URL=postgresql://test:test@localhost:5432/testdb  # pragma: allowlist secret
API_BASE_URL=http://localhost:8000/api
FRONTEND_URL=http://localhost:3000
ADMIN_EMAIL=admin@example.com
ADMIN_PASSWORD=Admin123!  # pragma: allowlist secret

// e2e/playwright.config.ts
export default defineConfig({
  // Test execution
  workers: 1, // MANDATORY: prevents data races
  fullyParallel: false, // Sequential execution
  retries: process.env.CI ? 2 : 0,

  // Timeouts
  timeout: 30000, // Per-test timeout
  expect: { timeout: 5000 }, // Assertion timeout

  // Artifacts
  use: {
    screenshot: "only-on-failure",
    video: "retain-on-failure",
    trace: "on-first-retry",
  },
});

> analyze test gaps and generate e2e tests to fill them

> generate e2e tests and run shadow testing against production

# e2e/templates/custom-template.py
CUSTOM_TEST_TEMPLATE = """
import {{ test, expect }} from '@playwright/test';
import {{ {helpers} }} from '../test-helpers/{helper_module}';

test.describe('{feature_name}', () => {{
  test.beforeEach(async ({{ page }}) => {{
    // Setup
    {setup_code}
  }});

  test('{test_description}', async ({{ page }}) => {{
    // Arrange
    {arrange_code}

    // Act
    {act_code}

    // Assert
    {assert_code}
  }});
}});
"""

from e2e_outside_in_test_generator.template_manager import TemplateManager

template_manager = TemplateManager()
template_manager.register_template("custom-flow", CUSTOM_TEST_TEMPLATE)

test_code = template_manager.render("custom-flow", {
    "feature_name": "Payment Processing",
    "helpers": "login, checkout",
    "helper_module": "payment",
    "setup_code": "await setupPaymentGateway();",
    "arrange_code": "const cart = await createCart();",
    "act_code": "await processPayment(cart);",
    "assert_code": "await expect(page.getByText(/payment successful/i)).toBeVisible();"
})

// e2e/test-helpers/locators.ts
export function findByDataAttribute(page: Page, attr: string, value: string) {
  return page.locator(`[data-${attr}="${value}"]`);
}

export function findByAriaLabel(page: Page, label: string) {
  return page.locator(`[aria-label*="${label}" i]`);
}

// Usage in tests
await findByDataAttribute(page, "action", "submit").click();

// Group fast tests together
test.describe("Quick smoke tests", () => {
  test("homepage renders", async ({ page }) => {
    /* <1s */
  });
  test("navigation works", async ({ page }) => {
    /* <1s */
  });
});

// Isolate slow tests
test.describe("Full checkout flow @slow", () => {
  test("complete purchase", async ({ page }) => {
    /* 10s */
  });
});

// package.json
{
  "scripts": {
    "test:e2e": "playwright test",
    "test:e2e:quick": "playwright test --grep-invert @slow",
    "test:e2e:full": "playwright test",
    "test:e2e:smoke": "playwright test e2e/happy-path"
  }
}

# .github/workflows/e2e.yml
name: E2E Tests

on: [push, pull_request]

jobs:
  e2e:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - uses: actions/setup-node@v3
        with:
          node-version: "18"

      - name: Install dependencies
        run: npm ci

      - name: Install Playwright
        run: npx playwright install --with-deps

      - name: Run E2E tests
        run: npm run test:e2e
        env:
          DATABASE_URL: ${{ secrets.TEST_DATABASE_URL }}

      - uses: actions/upload-artifact@v3
        if: failure()
        with:
          name: playwright-report
          path: playwright-report/

# Run single test in headed mode
npx playwright test e2e/happy-path/login.spec.ts --headed

# Run with debugger
npx playwright test --debug

# Generate trace for failing test
npx playwright test --trace on

# View trace
npx playwright show-trace trace.zip