Answer

Understanding Playwright Test Blocks

In @playwright/test, you'll find several blocks that help you structure your tests.

Grouping Tests with test.describe()

The test.describe() block is used to group tests. It takes a string for the group title and a callback function containing the tests for the group. Here's an example:

test.describe('Login Tests', () => {
  // Your tests go here
});

Setting Up with test.beforeAll()

The test.beforeAll() block runs before all tests in the file or group. If you have multiple beforeAll hooks, they run in the order they're registered. If a test fails, the worker process restarts and beforeAll runs again.

test.beforeAll(async () => {
  // Setup code here
});

Cleaning Up with test.afterAll()

The test.afterAll() block is for teardown. It runs after all tests have completed.

test.afterAll(async () => {
  // Teardown code here
});

Preparing Each Test with test.beforeEach()

The test.beforeEach() block runs before each test in the file or group. If you have multiple beforeEach hooks, they run in the order they're registered.

test.beforeEach(async () => {
  // Preparation code here
});

Writing Tests

Finally, the test block is for individual test cases. It takes a string for the test title and an async function for the test implementation.

test('should display the correct title', async () => {
  // Test code here
});

These blocks help you organize your tests, and provide setup and teardown for your test groups and individual test cases. For more tips on efficient test writing, check out this blog post.