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/**
* @license
* Copyright 2018 Google Inc.
* SPDX-License-Identifier: Apache-2.0
*/
import assert from 'assert';
import expect from 'expect';
import {Puppeteer} from 'puppeteer-core';
import type {ElementHandle} from 'puppeteer-core/internal/api/ElementHandle.js';
import {getTestState, setupTestBrowserHooks} from './mocha-utils.js';
describe('Query handler tests', function () {
setupTestBrowserHooks();
describe('Pierce selectors', function () {
async function setUpPage(): ReturnType<typeof getTestState> {
const state = await getTestState();
await state.page.setContent(
`<script>
const div = document.createElement('div');
const shadowRoot = div.attachShadow({mode: 'open'});
const div1 = document.createElement('div');
div1.textContent = 'Hello';
div1.className = 'foo';
const div2 = document.createElement('div');
div2.textContent = 'World';
div2.className = 'foo';
shadowRoot.appendChild(div1);
shadowRoot.appendChild(div2);
document.documentElement.appendChild(div);
</script>`
);
return state;
}
it('should find first element in shadow', async () => {
const {page} = await setUpPage();
using div = (await page.$('pierce/.foo')) as ElementHandle<HTMLElement>;
const text = await div.evaluate(element => {
return element.textContent;
});
expect(text).toBe('Hello');
});
it('should find all elements in shadow', async () => {
const {page} = await setUpPage();
const divs = (await page.$$('pierce/.foo')) as Array<
ElementHandle<HTMLElement>
>;
const text = await Promise.all(
divs.map(div => {
return div.evaluate(element => {
return element.textContent;
});
})
);
expect(text.join(' ')).toBe('Hello World');
});
it('should find first child element', async () => {
const {page} = await setUpPage();
using parentElement = (await page.$('html > div'))!;
using childElement = (await parentElement.$(
'pierce/div'
)) as ElementHandle<HTMLElement>;
const text = await childElement.evaluate(element => {
return element.textContent;
});
expect(text).toBe('Hello');
});
it('should find all child elements', async () => {
const {page} = await setUpPage();
using parentElement = (await page.$('html > div'))!;
const childElements = (await parentElement.$$('pierce/div')) as Array<
ElementHandle<HTMLElement>
>;
const text = await Promise.all(
childElements.map(div => {
return div.evaluate(element => {
return element.textContent;
});
})
);
expect(text.join(' ')).toBe('Hello World');
});
});
describe('Text selectors', function () {
describe('in Page', function () {
it('should query existing element', async () => {
const {page} = await getTestState();
await page.setContent('<section>test</section>');
expect(await page.$('text/test')).toBeTruthy();
expect(await page.$$('text/test')).toHaveLength(1);
});
it('should return empty array for non-existing element', async () => {
const {page} = await getTestState();
expect(await page.$('text/test')).toBeFalsy();
expect(await page.$$('text/test')).toHaveLength(0);
});
it('should return first element', async () => {
const {page} = await getTestState();
await page.setContent('<div id="1">a</div><div>a</div>');
using element = await page.$('text/a');
expect(
await element?.evaluate(e => {
return e.id;
})
).toBe('1');
});
it('should return multiple elements', async () => {
const {page} = await getTestState();
await page.setContent('<div>a</div><div>a</div>');
const elements = await page.$$('text/a');
expect(elements).toHaveLength(2);
});
it('should pierce shadow DOM', async () => {
const {page} = await getTestState();
await page.evaluate(() => {
const div = document.createElement('div');
const shadow = div.attachShadow({mode: 'open'});
const diva = document.createElement('div');
shadow.append(diva);
const divb = document.createElement('div');
shadow.append(divb);
diva.innerHTML = 'a';
divb.innerHTML = 'b';
document.body.append(div);
});
using element = await page.$('text/a');
expect(
await element?.evaluate(e => {
return e.textContent;
})
).toBe('a');
});
it('should query deeply nested text', async () => {
const {page} = await getTestState();
await page.setContent('<div><div>a</div><div>b</div></div>');
using element = await page.$('text/a');
expect(
await element?.evaluate(e => {
return e.textContent;
})
).toBe('a');
});
it('should query inputs', async () => {
const {page} = await getTestState();
await page.setContent('<input value="a">');
using element = (await page.$(
'text/a'
)) as ElementHandle<HTMLInputElement>;
expect(
await element?.evaluate(e => {
return e.value;
})
).toBe('a');
});
it('should not query radio', async () => {
const {page} = await getTestState();
await page.setContent('<radio value="a">');
expect(await page.$('text/a')).toBeNull();
});
it('should query text spanning multiple elements', async () => {
const {page} = await getTestState();
await page.setContent('<div><span>a</span> <span>b</span><div>');
using element = await page.$('text/a b');
expect(
await element?.evaluate(e => {
return e.textContent;
})
).toBe('a b');
});
it('should clear caches', async () => {
const {page} = await getTestState();
await page.setContent(
'<div id=target1>text</div><input id=target2 value=text><div id=target3>text</div>'
);
using div = (await page.$('#target1')) as ElementHandle<HTMLDivElement>;
using input = (await page.$(
'#target2'
)) as ElementHandle<HTMLInputElement>;
await div.evaluate(div => {
div.textContent = 'text';
});
expect(
await page.$eval(`text/text`, e => {
return e.id;
})
).toBe('target1');
await div.evaluate(div => {
div.textContent = 'foo';
});
expect(
await page.$eval(`text/text`, e => {
return e.id;
})
).toBe('target2');
await input.evaluate(input => {
input.value = '';
});
await input.type('foo');
expect(
await page.$eval(`text/text`, e => {
return e.id;
})
).toBe('target3');
await div.evaluate(div => {
div.textContent = 'text';
});
await input.evaluate(input => {
input.value = '';
});
await input.type('text');
expect(
await page.$$eval(`text/text`, es => {
return es.length;
})
).toBe(3);
await div.evaluate(div => {
div.textContent = 'foo';
});
expect(
await page.$$eval(`text/text`, es => {
return es.length;
})
).toBe(2);
await input.evaluate(input => {
input.value = '';
});
await input.type('foo');
expect(
await page.$$eval(`text/text`, es => {
return es.length;
})
).toBe(1);
});
});
describe('in ElementHandles', function () {
it('should query existing element', async () => {
const {page} = await getTestState();
await page.setContent('<div class="a"><span>a</span></div>');
using elementHandle = (await page.$('div'))!;
expect(await elementHandle.$(`text/a`)).toBeTruthy();
expect(await elementHandle.$$(`text/a`)).toHaveLength(1);
});
it('should return null for non-existing element', async () => {
const {page} = await getTestState();
await page.setContent('<div class="a"></div>');
using elementHandle = (await page.$('div'))!;
expect(await elementHandle.$(`text/a`)).toBeFalsy();
expect(await elementHandle.$$(`text/a`)).toHaveLength(0);
});
});
});
describe('XPath selectors', function () {
describe('in Page', function () {
it('should query existing element', async () => {
const {page} = await getTestState();
await page.setContent('<section>test</section>');
expect(await page.$('xpath/html/body/section')).toBeTruthy();
expect(await page.$$('xpath/html/body/section')).toHaveLength(1);
});
it('should return empty array for non-existing element', async () => {
const {page} = await getTestState();
expect(
await page.$('xpath/html/body/non-existing-element')
).toBeFalsy();
expect(
await page.$$('xpath/html/body/non-existing-element')
).toHaveLength(0);
});
it('should return first element', async () => {
const {page} = await getTestState();
await page.setContent('<div>a</div><div></div>');
using element = await page.$('xpath/html/body/div');
expect(
await element?.evaluate(e => {
return e.textContent === 'a';
})
).toBeTruthy();
});
it('should return multiple elements', async () => {
const {page} = await getTestState();
await page.setContent('<div></div><div></div>');
const elements = await page.$$('xpath/html/body/div');
expect(elements).toHaveLength(2);
});
});
describe('in ElementHandles', function () {
it('should query existing element', async () => {
const {page} = await getTestState();
await page.setContent('<div class="a">a<span></span></div>');
using elementHandle = (await page.$('div'))!;
expect(await elementHandle.$(`xpath/span`)).toBeTruthy();
expect(await elementHandle.$$(`xpath/span`)).toHaveLength(1);
});
it('should return null for non-existing element', async () => {
const {page} = await getTestState();
await page.setContent('<div class="a">a</div>');
using elementHandle = (await page.$('div'))!;
expect(await elementHandle.$(`xpath/span`)).toBeFalsy();
expect(await elementHandle.$$(`xpath/span`)).toHaveLength(0);
});
});
});
describe('P selectors', () => {
beforeEach(async () => {
Puppeteer.clearCustomQueryHandlers();
});
it('should work with CSS selectors', async () => {
const {server, page} = await getTestState();
await page.goto(`${server.PREFIX}/p-selectors.html`);
using element = await page.$('div > button');
assert(element, 'Could not find element');
expect(
await element.evaluate(element => {
return element.id === 'b';
})
).toBeTruthy();
// Should parse more complex CSS selectors. Listing a few problematic
// cases from bug reports.
for (const selector of [
'.user_row[data-user-id="\\38 "]:not(.deactivated_user)',
`input[value='Search']:not([class='hidden'])`,
`[data-test-id^="test-"]:not([data-test-id^="test-foo"])`,
]) {
await page.$$(selector);
}
});
it('should work with deep combinators', async () => {
const {server, page} = await getTestState();
await page.goto(`${server.PREFIX}/p-selectors.html`);
{
using element = await page.$('div >>>> div');
assert(element, 'Could not find element');
expect(
await element.evaluate(element => {
return element.id === 'c';
})
).toBeTruthy();
}
{
const elements = await page.$$('div >>> div');
assert(elements[1], 'Could not find element');
expect(
await elements[1]?.evaluate(element => {
return element.id === 'd';
})
).toBeTruthy();
}
{
const elements = await page.$$('#c >>>> div');
assert(elements[0], 'Could not find element');
expect(
await elements[0]?.evaluate(element => {
return element.id === 'd';
})
).toBeTruthy();
}
{
const elements = await page.$$('#c >>> div');
assert(elements[0], 'Could not find element');
expect(
await elements[0]?.evaluate(element => {
return element.id === 'd';
})
).toBeTruthy();
}
});
it('should work with text selectors', async () => {
const {server, page} = await getTestState();
await page.goto(`${server.PREFIX}/p-selectors.html`);
using element = await page.$('div ::-p-text(world)');
assert(element, 'Could not find element');
expect(
await element.evaluate(element => {
return element.id === 'b';
})
).toBeTruthy();
});
it('should work ARIA selectors', async () => {
const {server, page} = await getTestState();
await page.goto(`${server.PREFIX}/p-selectors.html`);
using element = await page.$('div ::-p-aria(world)');
assert(element, 'Could not find element');
expect(
await element.evaluate(element => {
return element.id === 'b';
})
).toBeTruthy();
});
it('should work for ARIA selectors in multiple isolated worlds', async () => {
const {server, page} = await getTestState();
await page.goto(`${server.PREFIX}/p-selectors.html`);
using element = await page.waitForSelector('::-p-aria(world)');
assert(element, 'Could not find element');
expect(
await element.evaluate(element => {
return element.id === 'b';
})
).toBeTruthy();
// $ would add ARIA query handler to the main world.
await element.$('::-p-aria(world)');
using element2 = await page.waitForSelector('::-p-aria(world)');
assert(element2, 'Could not find element');
expect(
await element2.evaluate(element => {
return element.id === 'b';
})
).toBeTruthy();
});
it('should work ARIA selectors with role', async () => {
const {server, page} = await getTestState();
await page.goto(`${server.PREFIX}/p-selectors.html`);
using element = await page.$('::-p-aria(world[role="button"])');
assert(element, 'Could not find element');
expect(
await element.evaluate(element => {
return element.id === 'b';
})
).toBeTruthy();
});
it('should work ARIA selectors with name and role', async () => {
const {server, page} = await getTestState();
await page.goto(`${server.PREFIX}/p-selectors.html`);
using element = await page.$('::-p-aria([name="world"][role="button"])');
assert(element, 'Could not find element');
expect(
await element.evaluate(element => {
return element.id === 'b';
})
).toBeTruthy();
});
it('should work XPath selectors', async () => {
const {server, page} = await getTestState();
await page.goto(`${server.PREFIX}/p-selectors.html`);
using element = await page.$('div ::-p-xpath(//button)');
assert(element, 'Could not find element');
expect(
await element.evaluate(element => {
return element.id === 'b';
})
).toBeTruthy();
});
it('should work with custom selectors', async () => {
Puppeteer.registerCustomQueryHandler('div', {
queryOne() {
return document.querySelector('div');
},
});
const {server, page} = await getTestState();
await page.goto(`${server.PREFIX}/p-selectors.html`);
using element = await page.$('::-p-div');
assert(element, 'Could not find element');
expect(
await element.evaluate(element => {
return element.id === 'a';
})
).toBeTruthy();
});
it('should work with custom selectors with args', async () => {
const {server, page} = await getTestState();
await page.goto(`${server.PREFIX}/p-selectors.html`);
Puppeteer.registerCustomQueryHandler('div', {
queryOne(_, selector) {
if (selector === 'true') {
return document.querySelector('div');
} else {
return document.querySelector('button');
}
},
});
{
using element = await page.$('::-p-div(true)');
assert(element, 'Could not find element');
expect(
await element.evaluate(element => {
return element.id === 'a';
})
).toBeTruthy();
}
{
using element = await page.$('::-p-div("true")');
assert(element, 'Could not find element');
expect(
await element.evaluate(element => {
return element.id === 'a';
})
).toBeTruthy();
}
{
using element = await page.$("::-p-div('true')");
assert(element, 'Could not find element');
expect(
await element.evaluate(element => {
return element.id === 'a';
})
).toBeTruthy();
}
{
using element = await page.$('::-p-div');
assert(element, 'Could not find element');
expect(
await element.evaluate(element => {
return element.id === 'b';
})
).toBeTruthy();
}
});
it('should work with :hover', async () => {
const {server, page} = await getTestState();
await page.goto(`${server.PREFIX}/p-selectors.html`);
using button = await page.$('div ::-p-text(world)');
assert(button, 'Could not find element');
await button.hover();
using button2 = await page.$('div ::-p-text(world):hover');
assert(button2, 'Could not find element');
const value = await button2.evaluate(span => {
return {textContent: span.textContent, tagName: span.tagName};
});
expect(value).toMatchObject({textContent: 'world', tagName: 'BUTTON'});
});
it('should work with selector lists', async () => {
const {server, page} = await getTestState();
await page.goto(`${server.PREFIX}/p-selectors.html`);
const elements = await page.$$('div, ::-p-text(world)');
expect(elements).toHaveLength(3);
});
const permute = <T>(inputs: T[]): T[][] => {
const results: T[][] = [];
for (let i = 0; i < inputs.length; ++i) {
const permutation = permute(
inputs.slice(0, i).concat(inputs.slice(i + 1))
);
const value = inputs[i] as T;
if (permutation.length === 0) {
results.push([value]);
continue;
}
for (const part of permutation) {
results.push([value].concat(part));
}
}
return results;
};
it('should match querySelector* ordering', async () => {
const {server, page} = await getTestState();
await page.goto(`${server.PREFIX}/p-selectors.html`);
for (const list of permute(['div', 'button', 'span'])) {
const elements = await page.$$(
list
.map(selector => {
return selector === 'button' ? '::-p-text(world)' : selector;
})
.join(',')
);
const actual = await Promise.all(
elements.map(element => {
return element.evaluate(element => {
return element.id;
});
})
);
expect(actual.join()).toStrictEqual('a,b,f,c');
}
});
it('should not have duplicate elements from selector lists', async () => {
const {server, page} = await getTestState();
await page.goto(`${server.PREFIX}/p-selectors.html`);
const elements = await page.$$('::-p-text(world), button');
expect(elements).toHaveLength(1);
});
it('should handle escapes', async () => {
const {server, page} = await getTestState();
await page.goto(`${server.PREFIX}/p-selectors.html`);
using element = await page.$(
':scope >>> ::-p-text(My name is Jun \\(pronounced like "June"\\))'
);
expect(element).toBeTruthy();
using element2 = await page.$(
':scope >>> ::-p-text("My name is Jun (pronounced like \\"June\\")")'
);
expect(element2).toBeTruthy();
using element3 = await page.$(
':scope >>> ::-p-text(My name is Jun \\(pronounced like "June"\\)")'
);
expect(element3).toBeFalsy();
using element4 = await page.$(
':scope >>> ::-p-text("My name is Jun \\(pronounced like "June"\\))'
);
expect(element4).toBeFalsy();
});
});
});