isabella232 / js-jest-mocks

Jest mocks for Google Maps Platform

Jest Mocks for Google Maps

Description

Jest mocks for Google Maps in TypeScript.

Note: If you find a missing mock, please open an issue.

NPM

Available via NPM as the package @googlemaps/jest-mocks

Inspecting mocks

You can inspect what happens with the created mock instances (e.g. Map or Marker) via the mockInstances object.

import { initialize, Map, Marker, mockInstances } from "@googlemaps/jest-mocks";

beforeEach(() => {
  initialize();
});

test("my test", () => {
  const map = new google.maps.Map(null);
  const markerOne = new google.maps.Marker();
  const markerTwo = new google.maps.Marker();

  map.setHeading(8);
  markerOne.setMap(map);
  markerTwo.setLabel("My marker");

  const mapMocks = mockInstances.get(Map);
  const markerMocks = mockInstances.get(Marker);

  expect(mapMocks).toHaveLength(1);
  expect(markerMocks).toHaveLength(2);
  expect(mapMocks[0].setHeading).toHaveBeenCalledWith(8);
  expect(markerMocks[0].setMap).toHaveBeenCalledTimes(1);
  expect(markerMocks[1].setLabel).toHaveBeenCalledWith("My marker");
});

Cleaning up mocks

Whenever initialize() is called, the captured mocks are automatically cleaned. Using any of Jest's methods, you can clean the mock instances at any time:

import { initialize, Map, Marker, mockInstances } from "@googlemaps/jest-mocks";

beforeAll(() => {
  initialize();
});

// Clear all mocks
beforeEach(() => {
  mockInstances.clearAll();
});

// Clear specific mocks
beforeEach(() => {
  mockInstances.clear(Map, Marker);
});

Support

This library is community supported. We're comfortable enough with the stability and features of the library that we want you to build real production applications on it.

If you find a bug, or have a feature suggestion, please log an issue. If you'd like to contribute, please read How to Contribute.