coder/site/jest.polyfills.js

45 lines
1.3 KiB
JavaScript

/**
* Necessary for MSW
*
* @note The block below contains polyfills for Node.js globals
* required for Jest to function when running JSDOM tests.
* These HAVE to be require's and HAVE to be in this exact
* order, since "undici" depends on the "TextEncoder" global API.
*
* Consider migrating to a more modern test runner if
* you don't want to deal with this.
*/
const { TextDecoder, TextEncoder } = require("node:util");
const { ReadableStream } = require("node:stream/web");
Object.defineProperties(globalThis, {
TextDecoder: { value: TextDecoder },
TextEncoder: { value: TextEncoder },
ReadableStream: { value: ReadableStream },
});
const { Blob, File } = require("node:buffer");
const { fetch, Headers, FormData, Request, Response } = require("undici");
Object.defineProperties(globalThis, {
fetch: { value: fetch, writable: true },
Blob: { value: Blob },
File: { value: File },
Headers: { value: Headers },
FormData: { value: FormData },
Request: { value: Request },
Response: { value: Response },
matchMedia: {
value: (query) => ({
matches: false,
media: query,
onchange: null,
addListener: jest.fn(),
removeListener: jest.fn(),
addEventListener: jest.fn(),
removeEventListener: jest.fn(),
dispatchEvent: jest.fn(),
}),
},
});