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unfetch/test/polyfill.test.js at main · developit/unfetch · GitHub

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import vm from "vm";

import fs from "fs";

describe("unfetch/polyfill", () => {

it("should resolve to fetch when window.fetch exists", () => {

function fetch() {}

let window = { fetch, require };

window.window = window.global = window.self = window;

let filename = require.resolve("../polyfill/index.js");

vm.runInNewContext(

fs.readFileSync(filename, "utf8"),

window,

"polyfill-test.js"

);

expect(window.fetch).toBe(fetch);

});

it("should resolve to unfetch when window.fetch does not exist", () => {

let window = { require };

window.window = window.global = window.self = window;

let filename = require.resolve("../polyfill/index.js");

vm.runInNewContext(

fs.readFileSync(filename, "utf8"),

window,

"polyfill-test.js"

);

expect(window.fetch).toEqual(expect.any(Function));

expect(window.fetch).toHaveLength(2);

});

});

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