Write individual test cases

Run Jest tests

Run tests in watch mode

jest/describe

Group related tests together

jest

describe

suites

describe("Component", () => { ... })

describe blocks group related tests together and can be nested for better organization.

Group user service tests

describe("UserService", () => { ... })

Group API tests

describe("API endpoints", () => { ... })

Generate test coverage report

Make assertions in tests

Test asynchronous code