playwright/test/elementhandle-eval-on-selector.spec.ts

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/**
* Copyright 2018 Google Inc. All rights reserved.
* Modifications copyright (c) Microsoft Corporation.
*
* 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 } from './playwright.fixtures';
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it('should work', async ({page, server}) => {
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await page.setContent('<html><body><div class="tweet"><div class="like">100</div><div class="retweets">10</div></div></body></html>');
const tweet = await page.$('.tweet');
const content = await tweet.$eval('.like', node => (node as HTMLElement).innerText);
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expect(content).toBe('100');
});
it('should retrieve content from subtree', async ({page, server}) => {
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const htmlContent = '<div class="a">not-a-child-div</div><div id="myId"><div class="a">a-child-div</div></div>';
await page.setContent(htmlContent);
const elementHandle = await page.$('#myId');
const content = await elementHandle.$eval('.a', node => (node as HTMLElement).innerText);
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expect(content).toBe('a-child-div');
});
it('should throw in case of missing selector', async ({page, server}) => {
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const htmlContent = '<div class="a">not-a-child-div</div><div id="myId"></div>';
await page.setContent(htmlContent);
const elementHandle = await page.$('#myId');
const errorMessage = await elementHandle.$eval('.a', node => (node as HTMLElement).innerText).catch(error => error.message);
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expect(errorMessage).toContain(`Error: failed to find element matching selector ".a"`);
});
it('should work for all', async ({page, server}) => {
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await page.setContent('<html><body><div class="tweet"><div class="like">100</div><div class="like">10</div></div></body></html>');
const tweet = await page.$('.tweet');
const content = await tweet.$$eval('.like', nodes => nodes.map(n => (n as HTMLElement).innerText));
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expect(content).toEqual(['100', '10']);
});
it('should retrieve content from subtree for all', async ({page, server}) => {
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const htmlContent = '<div class="a">not-a-child-div</div><div id="myId"><div class="a">a1-child-div</div><div class="a">a2-child-div</div></div>';
await page.setContent(htmlContent);
const elementHandle = await page.$('#myId');
const content = await elementHandle.$$eval('.a', nodes => nodes.map(n => (n as HTMLElement).innerText));
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expect(content).toEqual(['a1-child-div', 'a2-child-div']);
});
it('should not throw in case of missing selector for all', async ({page, server}) => {
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const htmlContent = '<div class="a">not-a-child-div</div><div id="myId"></div>';
await page.setContent(htmlContent);
const elementHandle = await page.$('#myId');
const nodesLength = await elementHandle.$$eval('.a', nodes => nodes.length);
expect(nodesLength).toBe(0);
});