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/**
* Manage the instance of a custom `window.location`
*
* This only encapsulates the setup / teardown logic so that it can easily be
* reused with different implementations (i.e. a spy or a [fake][1])
*
* [1]: https://stackoverflow.com/a/41434763/1708147
*
* @param {() => any} fn Function that returns the object to use for window.location
*/
const useMockLocation = fn => {
const origWindowLocation = window.location;
let currentWindowLocation;
Object.defineProperty(window, 'location', {
get: () => currentWindowLocation,
});
beforeEach(() => {
currentWindowLocation = fn();
});
afterEach(() => {
currentWindowLocation = origWindowLocation;
});
};
/**
* Create an object with the location interface but `jest.fn()` implementations.
*/
export const createWindowLocationSpy = () => {
return {
assign: jest.fn(),
reload: jest.fn(),
replace: jest.fn(),
toString: jest.fn(),
};
};
/**
* Before each test, overwrite `window.location` with a spy implementation.
*/
export const useMockLocationHelper = () => useMockLocation(createWindowLocationSpy);
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