webextension-polyfill/test/test-browser-global.js

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"use strict";
const {deepEqual, equal, ok} = require("chai").assert;
const {setupTestDOMWindow} = require("./setup");
describe("browser-polyfill", () => {
it("throws an error in a non-extension environment", async () => {
try {
await setupTestDOMWindow(null);
ok(false, "The polyfill script should have failed to load.");
} catch (e) {
equal(e.message,
"This script should only be loaded in a browser extension.",
"Expected script to not load in a non-extension environment");
}
});
it("wraps the global chrome namespace with a global browser namespace", () => {
const fakeChrome = {};
return setupTestDOMWindow(fakeChrome).then(window => {
equal(typeof window.browser, "object", "Got the window.browser object");
});
});
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it("does not override the global browser namespace if it already exists", () => {
const fakeChrome = {
runtime: {lastError: null},
};
const fakeBrowser = {
mycustomns: {mybrowserkey: true},
};
return setupTestDOMWindow(fakeChrome, fakeBrowser).then(window => {
deepEqual(window.browser, fakeBrowser,
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"The existing browser has not been wrapped");
});
});
describe("browser wrapper", () => {
it("supports custom properties defined using Object.defineProperty", () => {
const fakeChrome = {};
return setupTestDOMWindow(fakeChrome).then(window => {
Object.defineProperty(window.browser, "myns", {
enumerable: true,
configurable: true,
value: {mykey: true},
});
ok("myns" in window.browser, "The custom property exists");
ok("mykey" in window.browser.myns,
"The content of the custom property exists");
deepEqual(window.browser.myns, {mykey: true},
"The custom property has the expected content");
delete window.browser.myns;
ok(!("myns" in window.browser),
"The deleted custom defined property has been removed");
});
});
it("returns undefined for property undefined in the target", () => {
const fakeChrome = {myns: {mychromekey: true}};
return setupTestDOMWindow(fakeChrome).then(window => {
equal(window.browser.myns.mychromekey, true,
"Got the expected result from a wrapped property");
equal(window.browser.myns.nonexistent, undefined,
"Got undefined for non existent property");
equal(window.browser.nonexistent, undefined,
"Got undefined for non existent namespaces");
});
});
});
});