TIL-Lab49/Clearing Jest Mocks

clearing-jest-mocks.md

Mocking Services

When mocking services in jest, given:

const someMethodMock = mockService.someMethod as jest.Mock;
beforeEach(() => {
  jest.clearAllMocks()
})

Calling jest.clearAllMocks does not work as expected. Instead, you have to write:

beforeEach(() => {
  someMethodMock.mockReset()
})

This is a known issue with jest.