Related

Mock Functions

jest

Create mock functions for testing

Module Mocking

jest

Mock entire modules

Run Tests

jest

Run Jest tests

jest/timer

Timer Mocks

Mock timers in tests

jest
timer
mock

Command

jest.useFakeTimers()

Explanation

Fake timers allow you to control time in tests, useful for testing timeouts and intervals.

Examples

Enable fake timers

jest.useFakeTimers()

Advance time by 1 second

jest.advanceTimersByTime(1000)

Run all pending timers

jest.runAllTimers()

More

Watch Mode

jest

Run tests in watch mode

Test Suites

jest

Group related tests together

Individual Tests

jest

Write individual test cases