playwright/test/chromium-js-coverage.spec.ts

/**
 * Copyright 2018 Google Inc. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import { it, expect, describe } from './fixtures';

describe('JS Coverage', (suite, { browserName }) => {
  suite.skip(browserName !== 'chromium');
}, () => {
  it('should work', async function({page, server}) {
    await page.coverage.startJSCoverage();
    await page.goto(server.PREFIX + '/jscoverage/simple.html', { waitUntil: 'load' });
    const coverage = await page.coverage.stopJSCoverage();
    expect(coverage.length).toBe(1);
    expect(coverage[0].url).toContain('/jscoverage/simple.html');
    expect(coverage[0].functions.find(f => f.functionName === 'foo').ranges[0].count).toEqual(1);
  });

  it('should report sourceURLs', async function({page, server}) {
    await page.coverage.startJSCoverage();
    await page.goto(server.PREFIX + '/jscoverage/sourceurl.html');
    const coverage = await page.coverage.stopJSCoverage();
    expect(coverage.length).toBe(1);
    expect(coverage[0].url).toBe('nicename.js');
  });

  it('should ignore eval() scripts by default', async function({page, server}) {
    await page.coverage.startJSCoverage();
    await page.goto(server.PREFIX + '/jscoverage/eval.html');
    const coverage = await page.coverage.stopJSCoverage();
    expect(coverage.length).toBe(1);
  });

  it('shouldn\'t ignore eval() scripts if reportAnonymousScripts is true', async function({page, server}) {
    await page.coverage.startJSCoverage({reportAnonymousScripts: true});
    await page.goto(server.PREFIX + '/jscoverage/eval.html');
    const coverage = await page.coverage.stopJSCoverage();
    expect(coverage.find(entry => entry.url === '').source).toBe('console.log("foo")');
    expect(coverage.length).toBe(2);
  });

  it('should report multiple scripts', async function({page, server}) {
    await page.coverage.startJSCoverage();
    await page.goto(server.PREFIX + '/jscoverage/multiple.html');
    const coverage = await page.coverage.stopJSCoverage();
    expect(coverage.length).toBe(2);
    coverage.sort((a, b) => a.url.localeCompare(b.url));
    expect(coverage[0].url).toContain('/jscoverage/script1.js');
    expect(coverage[1].url).toContain('/jscoverage/script2.js');
  });

  it('should report scripts across navigations when disabled', async function({page, server}) {
    await page.coverage.startJSCoverage({resetOnNavigation: false});
    await page.goto(server.PREFIX + '/jscoverage/multiple.html');
    await page.goto(server.EMPTY_PAGE);
    const coverage = await page.coverage.stopJSCoverage();
    expect(coverage.length).toBe(2);
  });

  it('should NOT report scripts across navigations when enabled', async function({page, server}) {
    await page.coverage.startJSCoverage(); // Enabled by default.
    await page.goto(server.PREFIX + '/jscoverage/multiple.html');
    await page.goto(server.EMPTY_PAGE);
    const coverage = await page.coverage.stopJSCoverage();
    expect(coverage.length).toBe(0);
  });

  it('should not hang when there is a debugger statement', async function({page, server}) {
    await page.coverage.startJSCoverage();
    await page.goto(server.EMPTY_PAGE);
    await page.evaluate(() => {
      debugger; // eslint-disable-line no-debugger
    });
    await page.coverage.stopJSCoverage();
  });
});