jest-webextension-mock

    

Install

For npm:

``bash
npm i --save-dev jest-webextension-mock
`

For yarn:

`bash
yarn add --dev jest-webextension-mock
`

Setup

$3

In your package.json under the jest section add the setupFiles attribute with this module name.

`json
"jest": {
"setupFiles": [
"jest-webextension-mock"
]
}
`

$3

Alternatively you can create a new setup file and require this module.

__setups__/chrome.js
`js
require('jest-webextension-mock');
`

And add that file to your setupFiles:

`json
"jest": {
"setupFiles": [
"./__setups__/chrome.js"
]
}
`

Usage

Use this module to check that API calls were made when expected.

`js
describe('your function to test', () => {
it('should have called a webextension API', () => {
yourFunctionToTest();
expect(chrome.tabs.update).toHaveBeenCalled();
});
});
`

Check the API was called with certain parameters.

`js
describe('your function to test', () => {
it('should have called a webextension API', () => {
yourFunctionToTest();
expect(chrome.tabs.update).toHaveBeenCalledWith({
url: 'https://example.com/'
});
});
});
`

And you can reset the API mocks to ensure APIs are only called when needed.

`js
beforeEach(() => {
browser.geckoProfiler.start.mockClear();
browser.geckoProfiler.stop.mockClear();
});

it('should toggle the profiler on from stopped', () => {
const store = mockStore(reducer(undefined, {}));
const expectedActions = [
{ type: 'PROFILER_START', status: 'start' },
{ type: 'PROFILER_START', status: 'done' },
];
return store.dispatch(actions.toggle()).then(() => {
expect(browser.geckoProfiler.start).toHaveBeenCalledTimes(1);
expect(store.getActions()).toEqual(expectedActions);
});
});
`

Development

`
npm install
npm test
``