puppeteer/test/worker.spec.js

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module.exports.addTests = function({testRunner, expect}) {
const {describe, xdescribe, fdescribe} = testRunner;
const {it, fit, xit} = testRunner;
const {beforeAll, beforeEach, afterAll, afterEach} = testRunner;
describe('Workers', function() {
it('Page.workers', async function({page, server}) {
await Promise.all([
new Promise(x => page.once('workercreated', x)),
page.goto(server.PREFIX + '/worker/worker.html')]);
const worker = page.workers()[0];
expect(worker.url()).toContain('worker.js');
expect(await worker.evaluate(() => self.workerFunction())).toBe('worker function result');
await page.goto(server.EMPTY_PAGE);
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expect(page.workers().length).toBe(0);
});
it('should emit created and destroyed events', async function({page}) {
const workerCreatedPromise = new Promise(x => page.once('workercreated', x));
const workerObj = await page.evaluateHandle(() => new Worker('data:text/javascript,1'));
const worker = await workerCreatedPromise;
const workerThisObj = await worker.evaluateHandle(() => this);
const workerDestroyedPromise = new Promise(x => page.once('workerdestroyed', x));
await page.evaluate(workerObj => workerObj.terminate(), workerObj);
expect(await workerDestroyedPromise).toBe(worker);
const error = await workerThisObj.getProperty('self').catch(error => error);
expect(error.message).toContain('Most likely the worker has been closed.');
});
it('should report console logs', async function({page}) {
const logPromise = new Promise(x => page.on('console', x));
await page.evaluate(() => new Worker(`data:text/javascript,console.log(1)`));
const log = await logPromise;
expect(log.text()).toBe('1');
});
it('should have JSHandles for console logs', async function({page}) {
const logPromise = new Promise(x => page.on('console', x));
await page.evaluate(() => new Worker(`data:text/javascript,console.log(1,2,3,this)`));
const log = await logPromise;
expect(log.text()).toBe('1 2 3 JSHandle@object');
expect(log.args().length).toBe(4);
expect(await (await log.args()[3].getProperty('origin')).jsonValue()).toBe('null');
});
it('should have an execution context', async function({page}) {
const workerCreatedPromise = new Promise(x => page.once('workercreated', x));
await page.evaluate(() => new Worker(`data:text/javascript,console.log(1)`));
const worker = await workerCreatedPromise;
expect(await (await worker.executionContext()).evaluate('1+1')).toBe(2);
});
it('should report errors', async function({page}) {
const errorPromise = new Promise(x => page.on('pageerror', x));
await page.evaluate(() => new Worker(`data:text/javascript, throw new Error('this is my error');`));
const errorLog = await errorPromise;
expect(errorLog.message).toContain('this is my error');
});
});
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};