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<div id="app" data-page="{"component":"web/courses/lessons/theory_unit","props":{"errors":{},"locale":"ru","language":"ru","httpsHost":"https://ru.hexlet.io","host":"ru.hexlet.io","colorScheme":"light","auth":{"user":{"id":null,"last_viewed_notification_id":null,"email":null,"state":null,"first_name":"","last_name":"","created_at":"2026-02-26T20:00:38.330Z","current_program":null,"current_team":null,"full_name":"","guest":true,"can_use_paid_features":false,"is_hexlet_employee":false,"sanitized_phone_number":"","can_subscribe":true,"can_renew_education":false}},"cloudflareTurnstileSiteKey":"0x4AAAAAAA15KmeFXzd2H0Xo","vkIdClientId":"51586979","yandexIdClientId":"88d071f1d3384eb4bd1deb37910235c7","formAuthToken":"lGxm2VGbEiWNV-C1or6RkC57znzGcKEonQtcWyh04fF7va3uo-W_RTsUxC2usWHn7nLj1s5HX4og68YPenMGnw","topics":[{"id":68681,"title":"День добрый!\n\nВ упражнении отличается html фикстура для тестов и html в веб-доступе. Из-за этого пришлось потратить некоторое время на фикс ошибок, т.к. изначально писал query testing library глядя на верстку в веб-доступе. Предлагаю сделать эти html одинаковые, чтобы студенты не путались :)","plain_title":"День добрый! В упражнении отличается html фикстура для тестов и html в веб-доступе. Из-за этого пришлось потратить некоторое время на фикс ошибок, т.к. изначально писал query testing library глядя на верстку в веб-доступе. Предлагаю сделать эти html одинаковые, чтобы студенты не путались :) ","creator":{"public_name":"Дмитрий Тыский","id":97741,"is_tutor":false},"comments":[{"creator":{"public_name":"Ivan Gagarinov","id":75907,"is_tutor":true},"id":176078,"body":"**User-84938ecd2bb3d58f**, здравствуйте. Нет, так приложение не должно работать. Приложение сломалось, но я уже исправил ошибку. Вам нужно сделать сброс, чтобы применились исправления (перед этим можете сохранить свое решение). Спасибо, что обратили внимание!","topic_id":68681},{"creator":{"public_name":"Ivan Gagarinov","id":75907,"is_tutor":true},"id":143893,"body":"**Дмитрий Тыский**, здравствуйте! Ага, перенёс, чтобы в контейнере приложения была одна структура.","topic_id":68681},{"creator":{"public_name":"User-84938ecd2bb3d58f","id":642344,"is_tutor":false},"id":176032,"body":"**Ivan Gagarinov**, Изначально приложение должно выглядеть пустым? То есть только 2 инпута и 2 кнопки? Списка по умолчанию, как написано нет. И еще почему то при добавлении задачи и нажатии на кнопку, браузер просто перезагружается, хотя preventDefault стоит\n\n","topic_id":68681}],"communitable":{"parent_entity_name":null,"parent_entity_url":null,"entity_name":"Testing Library Dom","entity_url":null,"active":true}},{"id":92561,"title":"Почему в тестах необходим userEvent.clear(input), если в браузере инпут очищается после нажатия кнопки добавить список/задачу? почему в тестах это очищение не происходит и приходится очищать вручную с помощью userEvent.clear?","plain_title":"Почему в тестах необходим userEvent.clear(input), если в браузере инпут очищается после нажатия кнопки добавить список/задачу? почему в тестах это очищение не происходит и приходится очищать вручную с помощью userEvent.clear? ","creator":{"public_name":"Ольга Краснова","id":236773,"is_tutor":false},"comments":[{"creator":{"public_name":"Ivan Gagarinov","id":75907,"is_tutor":true},"id":182332,"body":"**Ольга Краснова**, здравствуйте. В приложении для сброса вызывается метод для сброса формы `reset()`, но в тестах этот метод не сбрасывает данные формы. В тестах используется свой аналог ДОМ-дерева и его работа отличается от того, что есть в браузере. Поэтому такие вещи приходится учитывать в написании тестов.","topic_id":92561}],"communitable":{"parent_entity_name":null,"parent_entity_url":null,"entity_name":"Testing Library Dom","entity_url":null,"active":true}}],"lesson":{"exercise":null,"units":[{"id":4568,"name":"theory","url":"/courses/frontend-testing-browser/lessons/testing-library-dom/theory_unit"}],"links":[],"ordered_units":[{"id":4568,"name":"theory","url":"/courses/frontend-testing-browser/lessons/testing-library-dom/theory_unit"}],"id":2034,"slug":"testing-library-dom","state":"approved","name":"Testing Library Dom","course_order":500,"goal":"Изучаем экосистему Testing Library и работу с DOM API","self_study":null,"theory_video_provider":"vimeo","theory_video_uid":"560779808","theory":"---\ntheme: gaia\nclass:\n - lead\n - invert\npaginate: true\n---\n\n# Dom Testing Library\n\n## Hexlet\n\n---\n\n<!-- https://github.com/NoriSte/ui-testing-best-practices -->\n\n# Экосистема Testing Library\n\n* `dom testing library` — основная библиотека\n* `user-event` — имитация браузерных событий\n* `jest-dom` — кастомные матчеры Jest\n* `eslint-plugin-testing-library` — плагин ESLint для Testing Library\n* `eslint-plugin-jest-dom` — плагин ESLint для Jest DOM\n* Версии для фреймворков\n - `react testing library`\n - `angular testing library`\n - `svelte testing library`\n\n---\n\n\n# Ключевой руководящий принцип\n\nЧем лучше ваши тесты имитируют реальное использование вашего приложения, тем больше уверенности они могут вам дать\n\n---\n\n* тестируйте UI компоненты с точки зрения пользователя\n* избегайте проверки деталей реализации\n* не полагайтесь на конкретный фреймворк для тестирования\n* не используйте test runner\n* `DOM Testing Library` работает с любым окружением, где есть DOM API\n * Jest, Mocha\n * JSDOM\n * реальный браузер\n\n---\n\n\n```javascript\ntest('greeting', () => {\n const h1 = queryByText(/Hello/i)\n expect(h1).toHaveTextContent('Hello username!')\n expect(queryByText('Goodbye!')).not.toBeInTheDocument()\n})\n```\n\n---\n\n# Запросы\n\n- get, getAll\n- query, queryAll\n- find, findAll\n\n---\n\n<table><thead><tr><th></th><th>No Match</th><th>1 Match</th><th>1+ Match</th><th>Await?</th></tr></thead><tbody><tr><td><strong>getBy</strong></td><td>throw</td><td>return</td><td>throw</td><td>No</td></tr><tr><td><strong>findBy</strong></td><td>throw</td><td>return</td><td>throw</td><td>Yes</td></tr><tr><td><strong>queryBy</strong></td><td>null</td><td>return</td><td>throw</td><td>No</td></tr><tr><td><strong>getAllBy</strong></td><td>throw</td><td>array</td><td>array</td><td>No</td></tr><tr><td><strong>findAllBy</strong></td><td>throw</td><td>array</td><td>array</td><td>Yes</td></tr><tr><td><strong>queryAllBy</strong></td><td>[]</td><td>array</td><td>array</td><td>No</td></tr></tbody></table>\n\n---\n\n# ByRole\n\n* Селектор элементов по роли\n* `getByRole`, `getAllByRole`\n* `queryByRole` `queryAllByRole`\n* `findByRole`, `findAllByRole`\n* Доступные роли: link, button, form, heading, document, img, checkbox, radio, listitem, main, navigation, table, textbox\n* `getByRole(expectedRole, { name: /submit/i })`\n* `getByRole('checkbox', { checked: true })`\n* `getAllByRole('button', { hidden: true })`\n\n---\n\n```javascript\ntest('show a required field warning', async () => {\n const loginButton = getByRole(container, 'button', { name: 'Login' })\n loginButton.click()\n\n expect(await findByText(container, 'User Name Required')).toBeVisible()\n expect(await findByText(container, 'Password Required')).toBeVisible()\n})\n```\n\n---\n\n# ByText\n\n```html\n\n<a href=\"/about\">About ℹ️</a>\n\n```\n\n```javascript\nimport { getByText } from '@testing-library/dom'\nconst aboutLinkNode = getByText(document.body, /about/i)\n\n// ИЛИ\nimport { screen } from '@testing-library/dom'\nconst aboutLinkNode = screen.getByText(/about/i)\n```\n\n---\n# TextMatch\n\n* как строка\n * `screen.getByText(\"Hello World\")` - поиск по полной строке\n * `screen.getByText('llo worl', { exact: false })` — поиск по подстроке, игнорируется регистр\n* как регулярное выражение\n * `screen.getByText(/world/i)` — поиск по подстроке, игнорируется регистр\n * `screen.getByText(/^hello world$/i)` — поиск по полной строке, игнорируется регистр\n* как функция\n * `screen.getByText((content, element) => content.startsWith(\"Hello\"))`\n\n\n---\n\n* `screen.getByLabelText('Username')` ищет элемент с соответствющим label\n* `getByLabelText` хорошо подходит для полей формы\n* `getByPlaceholderText` ищет по атрибуту placeholder\n* `getByTitle` ищет по атрибуту title\n\n---\n\n```html\n<div id=\"app\">\n <label for=\"username-input\">Username</label>\n <input id=\"username-input\" />\n</div>\n```\n\n```javascript\nimport { getByLabelText } from '@testing-library/dom'\n\nconst container = document.querySelector('#app')\nconst inputNode = getByLabelText(container, 'Username')\n\n// ИЛИ\nimport { screen } from '@testing-library/dom'\n\nconst inputNode = screen.getByLabelText('Username')\n```\n\n---\n\n# ByTestId\n\n```html\n<div data-testid=\"mailbox\" />\n```\n\n```javascript\nconst element = document.body.querySelector(`[data-testid=\"mailbox\"]`)\n\n// OR\nimport { screen } from '@testing-library/dom'\nconst element = screen.getByTestId('mailbox')\n```\n\n* `configure({testIdAttribute: 'data-my-test-attribute'})`\n\n\n---\n\nРасширение для браузеров Chrome и Firefox `Testing Playground`\n\n---\n\n# Вызов событий\n\n---\n\n`fireEvent(node: HTMLElement, event: Event)`\n\n---\n\n```html\n<button>Submit</button>\n```\n\n```javascript\nfireEvent(\n screen.getByText('Submit'),\n new MouseEvent('click', {\n bubbles: true,\n cancelable: true,\n }),\n)\n```\n\n---\n\n`fireEvent[eventName](node: HTMLElement, eventProperties: Object)`\n\n<br>\n\n```javascript\nfireEvent.change(getByPlaceholderText(/username/i), { target: { value: 'ruslan' } })\n\nfireEvent.keyDown(getByRole('button'), { key: 'Enter', code: 'Enter' })\n```\n\n\n---\n\n# Асинхронность\n\n```javascript\nconst button = screen.getByRole('button', { name: 'Login' })\nfireEvent.click(button)\nawait screen.findByText('Hello')\n```\n---\n\n**`findBy` = `getBy` + `waitFor`**\n\n---\n\n# waitFor\n\n```typescript\nfunction waitFor<T>(\n callback: () => T | Promise<T>,\n options?: {\n container?: HTMLElement // document по умолчанию\n timeout?: number // 1000мс по умолчанию\n interval?: number // 50мс по умолчанию\n onTimeout?: (error: Error) => Error // ошибка и состояние контейнера по умолчанию\n mutationObserverOptions?: MutationObserverInit // вызов колбека при изменениях\n }\n): Promise<T>\n```\n\n---\n\n* `await waitFor(() => screen.getByRole('alert'))`\n\n* `await waitFor(() => expect(mockAPI).toHaveBeenCalledTimes(1))`\n\n* WaitForElementToBeRemoved\n\n* wrapper on `waitFor`\n\n---\n\n```javascript\nconst button = document.querySelector('button');\n\nwaitForElementToBeRemoved(document.querySelector('button')).then(() =>\n console.log('Element button no longer in DOM');\n);\n\n// изменения игнорируются\nbutton.setAttribute('data-is-submit', true);\n\n// логирует строку 'Element button no longer in DOM'\nbutton.parentElement.removeChild(button);\n```\n\n---\n\n* `fireEvent` подходит для большинства сценариев, НО\n* `fireEvent.click` не порождает другие события:\n * `fireEvent.mouseOver(element)`\n * `fireEvent.mouseMove(element)`\n * `fireEvent.mouseDown(element)`\n * `element.focus()` (если элемент допускает это)\n * `fireEvent.mouseUp(element)`\n * `fireEvent.click(element)`\n\n---\n# Рефакторинг \n\n```javascript\n// Было\nfireEvent.focus(getByText('focus me'))\n```\n\n```javascript\n// Стало\ngetByText('focus me').focus()\n```\n\n---\n\n# user-event \n\nЭто вспомогательная библиотека для `Testing Library`, которая обеспечивает более совершенное моделирование взаимодействия с браузером, чем встроенный метод fireEvent\n\n---\n\n```javascript\ntest('types inside textarea', () => {\n document.body.innerHTML = `<textarea />`\n\n userEvent.type(screen.getByRole('textbox'), 'Hello, World!')\n expect(screen.getByRole('textbox')).toHaveValue('Hello, World!')\n})\n```\n\n---\n\n```javascript\ntest('click', () => {\n render(`\n <div>\n <label for=\"checkbox\">Check</label>\n <input id=\"checkbox\" type=\"checkbox\" />\n </div>\n `)\n\n userEvent.click(screen.getByText('Check'))\n expect(screen.getByLabelText('Check')).toBeChecked()\n})\n```\n\n---\n\n# user-event API\n\n- click / dbclick\n- hover / unhover\n- type\n- upload\n- selectOptions / deselectOptions\n- tab\n- paste\n\n---\n\n# Click\n\n`click(element, eventInit, options)`\n\n---\n\nКлики по элементу, могут иметь различные побочные эффекты в зависимости от элемента\n\n```html\n<div>\n <label htmlFor=\"checkbox\">Check</label>\n <input id=\"checkbox\" type=\"checkbox\" />\n</div>\n```\n\n```javascript\nuserEvent.click(screen.getByText('Check'))\nexpect(screen.getByLabelText('Check')).toBeChecked()\n```\n\n---\n\n* Клик вызовет сначала событие hover\n Его можно отключить установив`true` для параметра `skipHover`\n* Можно также вызывать клик с зажатыми клавишаи, ctrlClick / shiftClick / пр.\n * `userEvent.click(elem, { ctrlKey: true, shiftKey: true })`\n\n<!--\n---\n\n# Домашнее задание\n\nПротестируйте приложение **Simple Todo List** c помощью инструментов `dom-testing-library` и `user-event`\n\n```\n\nhexlet program download frontend-testing-react testing-library-dom\n\n```\n-->\n"},"lessonMember":null,"courseMember":null,"course":{"start_lesson":{"exercise":null,"units":[{"id":4569,"name":"theory","url":"/courses/frontend-testing-browser/lessons/web-drivers/theory_unit"}],"links":[],"ordered_units":[{"id":4569,"name":"theory","url":"/courses/frontend-testing-browser/lessons/web-drivers/theory_unit"}],"id":2035,"slug":"web-drivers","state":"approved","name":"WebDrivers","course_order":100,"goal":"Знакомимся с инструментами для взаимодействия с браузерами","self_study":null,"theory_video_provider":"vimeo","theory_video_uid":"558045248","theory":"## Web Drivers\n\nWeb Drivers - это инструменты для взаимодействия с браузером.\n\n* Интерфейс удаленного управления, который позволяет анализировать и управлять браузером\n* Платформонезависимый и не зависит от языка\n* Предоставляет набор интерфейсов для нахождения и управления элементами DOM\n* Не имеет прямого отношения к тестированию\n\n## Selenium\n\nSelenium — один из популярных фреймворков для тестирования. Поддерживается всеми основными платформами и на всех браузерах. Он позволяет автоматизировать тестирование, имитировать действия пользователей.\n\nИспользование:\n\n```javascript\nimport { Builder, By, Key, until } from 'selenium-webdriver'\n\ndescribe('web driver', () => {\n let driver\n\n test('google first result', async () => {\n // Создаём инстанс вебдрайвера\n driver = new Builder().forBrowser('chrome').build()\n\n // Выполняем переход на страницу\n driver.get('https://www.google.com')\n\n // Получаем элемент ввода\n const input = driver.findElement(By.name('q'))\n\n // Вызываем на элементе события нажатия клавиш (ввод в поиск и Enter)\n await input.sendKeys('hello', Key.ENTER)\n\n // Дожидаемся пока не появится элемент и получаем его\n const firstResult = await driver.wait(until.elementLocated(By.css('h3')), 10000)\n\n // Выводим содержимое элемента\n console.log(await firstResult.getAttribute('textContent'))\n }, 10000)\n\n afterEach(() => {\n driver.quit()\n })\n})\n```\n\nВ асинхронных запросах промисы должны возвращаться из тестов, иначе тесты не дожидаются выполнение асинхронных операций. Либо нужно использовать `async await`\n\n```javascript\nimport { Builder, By, Key } from 'selenium-webdriver'\n\nconst URL = 'http://svelte3-todo.surge.sh/'\n\ndescribe('web driver', () => {\n let driver\n\n // Создаём драйвер перед выполнением тестов\n beforeAll(() => {\n driver = new Builder()\n .forBrowser('chrome')\n .build()\n })\n\n // Тест добавления таска\n test('add a task', async () => {\n // Выполняем переход на страницу\n driver.get(URL)\n\n // Возвращаем промис из теста\n return driver.findElement(By.className('js-todo-input')).sendKeys('Build App', Key.ENTER)\n // Асинхнронные запросы оборачиваем в цепочку промиса\n .then(() => driver.getPageSource())\n .then((source) => {\n expect(source.includes('Build App')).toBe(true)\n })\n }, 1000)\n\n // Тест отметки таска как пройденного\n test('mark a task complete', () => {\n driver.get(URL)\n\n return driver.findElement(By.className('js-todo-input')).sendKeys('Build App', Key.ENTER) // Создаём таск\n // Перед изменением таска, проверяем что он не завершен, для этого проверяем класс\n .then(() => driver.findElement(By.className('todo-item')).getAttribute('class')) // получаем класс, асинхронный запрос\n .then((className) => {\n // проверяем что класс не содержит 'done'\n expect(className.includes('done')).toBe(false)\n // Вызываем клик по задаче (отмечаем что она завершена)\n // это асинхронная операция, поэтому возвращаем промис\n return driver.findElement(By.css('label')).click()\n })\n // Снова получаем класс, асинхронный запрос, поэтому оборачиваем в цепочку then\n .then(() => driver.findElement(By.className('todo-item')).getAttribute('class'))\n .then((className) => {\n // Проверяем имя класса\n expect(className.includes('done')).toBe(true)\n })\n }, 1000)\n\n test('delete a task', () => {\n driver.get(URL)\n\n // Перед удалением также создаем таск\n return driver.findElement(By.className('js-todo-input')).sendKeys('Build App', Key.ENTER)\n // Кликаем по кнопке удаления\n .then(() => driver.findElement(By.className('delete-todo')).click())\n // Получаем содержимое страницы\n .then(() => driver.getPageSource())\n .then((source) => {\n // Проверяем что таск удалён\n expect(source.includes('Build App')).toBe(false)\n })\n }, 1000)\n\n afterAll(() => {\n driver.quit()\n })\n})\n```\n\nТоже самое с `async await`:\n\n```javascript\nimport { Builder, By, Key } from 'selenium-webdriver'\n\nconst URL = 'http://svelte3-todo.surge.sh/'\n\ndescribe('web driver', () => {\n let driver\n\n // Создаём драйвер перед выполнением тестов\n beforeAll(() => {\n driver = new Builder()\n .forBrowser('chrome')\n .build()\n })\n\n // Тест добавления таска\n test('add a task', async () => {\n // Выполняем переход на страницу\n driver.get(URL)\n\n // Создаём таск\n await driver.findElement(By.className('js-todo-input')).sendKeys('Build App', Key.ENTER)\n const source = await driver.getPageSource()\n expect(source.includes('Build App')).toBe(true)\n }, 1000)\n\n // Тест отметки таска как пройденного\n test('mark a task complete', async () => {\n driver.get(URL)\n\n // Создаём таск\n await driver.findElement(By.className('js-todo-input')).sendKeys('Build App', Key.ENTER)\n // Перед изменением таска, проверяем что он не завершен, для этого проверяем класс\n const classNameBefore = await driver.findElement(By.className('todo-item')).getAttribute('class') // получаем класс\n\n // проверяем что класс не содержит 'done'\n expect(classNameBefore.includes('done')).toBe(false)\n // Вызываем клик по задаче (отмечаем что она завершена)\n await driver.findElement(By.css('label')).click()\n // Снова получаем класс\n const classNameAfter = await driver.findElement(By.className('todo-item')).getAttribute('class')\n\n // Проверяем имя класса\n expect(classNameAfter.includes('done')).toBe(true)\n }, 1000)\n\n test('delete a task', async () => {\n driver.get(URL)\n\n // Перед удалением также создаем таск\n await driver.findElement(By.className('js-todo-input')).sendKeys('Build App', Key.ENTER)\n // Кликаем по кнопке удаления\n await driver.findElement(By.className('delete-todo')).click()\n // Получаем содержимое страницы\n const source = await driver.getPageSource()\n // Проверяем что таск удалён\n expect(source.includes('Build App')).toBe(false)\n }, 1000)\n\n afterAll(() => {\n driver.quit()\n })\n})\n```\n\n## Cypress\n\nCypress — это e2e фреймворк для тестирования на JS, имеет свой тест-раннер, поддерживает множество языков.\n\nКомпонентное тестирование:\n\n```jsx\nimport * as React from 'react'\nimport { mount } from '@cypress/react'\nimport Button from './Button.jsx'\n\nit('Button', () => {\n // Рендерим кнопку\n mount(<Button>Text button</Button>)\n // Кликаем по кнопке\n cy.get('button').contains('Test button').click()\n})\n```\n\n```javascript\n// Тестируем завершения таска\nit('complete todo', () => {\n // Отрываем страницу\n cy.visit('/')\n // Находим элемент ввода, имитируем ввод имени таска и нажатие Enter\n cy.get('.new-todo').type('write tests{enter}')\n // Отмечаем выполнение таска\n cy.contains('.todo-list li', 'write tests').find('.toggle').check()\n\n // Проверяем наличие класса\n cy.contains('.todo-list li', 'write tests').should('have.class', 'completed')\n\n // При установленном плагине cypress-plugin-snapshots можно создавать скриншоты\n cy.get('.todoapp').toMatchImageSnapshot({\n imageConfig: {\n threshold: 0.001,\n },\n })\n})\n\n// Тест добавления таска\nit('adds todos', () => {\n // Открываем страницу\n cy.visit('/')\n\n // Создаём два таска\n cy.get('.new-todo')\n .type('write E2E tests{enter}')\n .type('add API tests as needed{enter}')\n\n // Проверяем что запросы были отправлены\n cy.request('/todos')\n .its('body')\n .should('have.length', 2)\n .and((items) => {\n // ...\n })\n})\n```\n\n## Playwright\n\nPlaywright — библиотека от Microsoft, так же поддерживает множество языков. Не имеет своего тестраннера.\n\nПример использования:\n\n```javascript\n// Подключаем библиотеку\nimport playwright from 'playwright';\n\n(async () => {\n // Тестируем на разных браузеров в цикле\n for (const browserType of ['chromium', 'firefox', 'webkit']) {\n // Запускаем браузер, получаем инстанс браузера\n const browser = await playwright[browserType].launch()\n // Получаем контекст браузера\n const context = await browser.newContext()\n // Получаем инстанс страницы\n const page = await context.newPage()\n // Открываем страницу\n await page.goto('https://mail.ru')\n // Вызываем событие\n await page.click('[data-testid=\"enter-password\"]')\n // Создаем скриншот\n await page.screenshot({ path: `mail-${browserType}.png` })\n // Закрываем браузер\n await browser.close()\n }\n})()\n```\n\nИмитация другого устройства:\n\n```javascript\nimport { webkit, devices } from 'playwright'\n\nconst iPhone11 = devices['iPhone 11 Pro']\n\ndescribe(() => {\n test('Main test', async () => {\n // Запускаем браузер, получаем инстанс браузера\n const browser = await webkit.launch()\n // Получаем контекст устройства, задаём свои настройки\n const context = await browser.newContext({\n ...iPhone11,\n locale: 'en-US',\n geolocation: { longitude: 12.492507, latitude: 41.889938 },\n permissions: ['geolocation'],\n })\n // Получаем инстанс страницы\n const page = await context.newPage()\n // Открываем страницу\n await page.goto('https://maps.google.com')\n // Вызываем событие\n await page.click('text=\"Your location\"')\n // Ждём выполнение запроса\n await page.waitForRequest(/.*preview\\/pwa/)\n // Создаём скриншот\n await page.screeshot({ path: 'iphone-11.png' })\n // Закрываем браузер\n await browser.close()\n })\n})\n```\n\n## Puppeteer\n\nPuppeteer — библиотека с упором на chrome. Синтаксис очень похож на playwright:\n\n```javascript\n// Подключаем библиотеку\nimport puppeteer from 'puppeteer'\n\ndescribe(() => {\n test('Main test', async () => {\n // Запускаем браузер и получаем инстанс браузера\n const browser = await puppeteer.launch()\n // Получаем инстанс страницы\n const page = await browser.newPage()\n // Открываем страницу\n await page.goto('https://mail.ru')\n // Вызываем событие\n await page.click('[data-testid=\"enter-password\"]')\n // Создаем скриншот\n await page.screenshot({ path: 'example.png' })\n\n // Закрываем браузер\n await browser.close()\n })\n})\n```\n"},"id":236,"slug":"frontend-testing-browser","challenges_count":0,"name":"Тестирование фронтенда","allow_indexing":true,"state":"approved","course_state":"finished","pricing_type":"paid","description":"На этом курсе вы изучите тестирование фронтенда. Вы узнаете больше о написании e2e-тестов с использованием веб-драйверов, работе с ошибками и фантомными падениями. 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100%);--button-color:var(--mantine-color-white);--button-bd:none" class="mantine-focus-auto mantine-active m_77c9d27d mantine-Button-root m_87cf2631 mantine-UnstyledButton-root" data-variant="gradient" data-size="xs" href="/u/new"><span class="m_80f1301b mantine-Button-inner"><span class="m_811560b9 mantine-Button-label">Зарегистрироваться</span></span></a></div></div></div></div></div><div class="paywalled m_d08caa0 mantine-Typography-root"><hr/>
<p>theme: gaia
class:</p>
<ul>
<li>lead</li>
<li>invert
paginate: true</li>
</ul>
<hr/>
<h1 id="heading-1-1">Dom Testing Library</h1>
<h2 id="heading-2-2">Hexlet</h2>
<hr/>
<!-- -->
<h1 id="heading-1-3">Экосистема Testing Library</h1>
<ul>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">dom testing library</code> — основная библиотека</li>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">user-event</code> — имитация браузерных событий</li>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">jest-dom</code> — кастомные матчеры Jest</li>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">eslint-plugin-testing-library</code> — плагин ESLint для Testing Library</li>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">eslint-plugin-jest-dom</code> — плагин ESLint для Jest DOM</li>
<li>Версии для фреймворков
<ul>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">react testing library</code></li>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">angular testing library</code></li>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">svelte testing library</code></li>
</ul>
</li>
</ul>
<hr/>
<h1 id="heading-1-4">Ключевой руководящий принцип</h1>
<p>Чем лучше ваши тесты имитируют реальное использование вашего приложения, тем больше уверенности они могут вам дать</p>
<hr/>
<ul>
<li>тестируйте UI компоненты с точки зрения пользователя</li>
<li>избегайте проверки деталей реализации</li>
<li>не полагайтесь на конкретный фреймворк для тестирования</li>
<li>не используйте test runner</li>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">DOM Testing Library</code> работает с любым окружением, где есть DOM API
<ul>
<li>Jest, Mocha</li>
<li>JSDOM</li>
<li>реальный браузер</li>
</ul>
</li>
</ul>
<hr/>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">test('greeting', () => {
const h1 = queryByText(/Hello/i)
expect(h1).toHaveTextContent('Hello username!')
expect(queryByText('Goodbye!')).not.toBeInTheDocument()
})</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<hr/>
<h1 id="heading-1-5">Запросы</h1>
<ul>
<li>get, getAll</li>
<li>query, queryAll</li>
<li>find, findAll</li>
</ul>
<hr/>
<div style="--table-min-width:calc(50rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_a100c15 mantine-TableScrollContainer-scrollContainer m_d57069b5 mantine-ScrollArea-root"><div style="overflow-x:hidden;overflow-y:hidden" class="m_c0783ff9 mantine-ScrollArea-viewport" data-offset-scrollbars="x" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><div class="m_62259741 mantine-TableScrollContainer-scrollContainerInner"><table><thead><tr><th></th><th>No Match</th><th>1 Match</th><th>1+ Match</th><th>Await?</th></tr></thead><tbody><tr><td><strong>getBy</strong></td><td>throw</td><td>return</td><td>throw</td><td>No</td></tr><tr><td><strong>findBy</strong></td><td>throw</td><td>return</td><td>throw</td><td>Yes</td></tr><tr><td><strong>queryBy</strong></td><td>null</td><td>return</td><td>throw</td><td>No</td></tr><tr><td><strong>getAllBy</strong></td><td>throw</td><td>array</td><td>array</td><td>No</td></tr><tr><td><strong>findAllBy</strong></td><td>throw</td><td>array</td><td>array</td><td>Yes</td></tr><tr><td><strong>queryAllBy</strong></td><td>[]</td><td>array</td><td>array</td><td>No</td></tr></tbody></table></div></div></div></div>
<hr/>
<h1 id="heading-1-6">ByRole</h1>
<ul>
<li>Селектор элементов по роли</li>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">getByRole</code>, <code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">getAllByRole</code></li>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">queryByRole</code> <code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">queryAllByRole</code></li>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">findByRole</code>, <code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">findAllByRole</code></li>
<li>Доступные роли: link, button, form, heading, document, img, checkbox, radio, listitem, main, navigation, table, textbox</li>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">getByRole(expectedRole, { name: /submit/i })</code></li>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">getByRole('checkbox', { checked: true })</code></li>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">getAllByRole('button', { hidden: true })</code></li>
</ul>
<hr/>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">test('show a required field warning', async () => {
const loginButton = getByRole(container, 'button', { name: 'Login' })
loginButton.click()
expect(await findByText(container, 'User Name Required')).toBeVisible()
expect(await findByText(container, 'Password Required')).toBeVisible()
})</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<hr/>
<h1 id="heading-1-7">ByText</h1>
<div class="m_5cb1b9c8 mantine-CodeHighlightTabs-root"><div style="--sa-corner-width:0px;--sa-corner-height:0px" class="m_7b14120b mantine-CodeHighlightTabs-filesScrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><div class="m_38d99e51 mantine-CodeHighlightTabs-files"><button class="mantine-focus-auto m_5cac2e62 mantine-CodeHighlightTabs-file m_87cf2631 mantine-UnstyledButton-root" data-active="true" type="button"><span>html</span></button><button class="mantine-focus-auto m_5cac2e62 mantine-CodeHighlightTabs-file m_87cf2631 mantine-UnstyledButton-root" type="button"><span>javascript</span></button></div></div></div><div data-orientation="horizontal" class="m_c44ba933 mantine-ScrollArea-scrollbar" data-hidden="true" style="position:absolute;--sa-thumb-width:18px" data-mantine-scrollbar="true"></div><div class="m_c44ba933 mantine-ScrollArea-scrollbar" data-hidden="true" data-orientation="vertical" style="position:absolute;--sa-thumb-height:18px" data-mantine-scrollbar="true"></div></div><div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlightTabs-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlightTabs-controls" data-with-offset="true"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlightTabs-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlightTabs-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlightTabs-pre" data-with-offset="true"><code class="m_5caae6d3 mantine-CodeHighlightTabs-code"><a href="/about">About ℹ️</a></code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlightTabs-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div></div><hr/>
<h1 id="heading-1-8">TextMatch</h1>
<ul>
<li>как строка
<ul>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">screen.getByText("Hello World")</code> - поиск по полной строке</li>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">screen.getByText('llo worl', { exact: false })</code> — поиск по подстроке, игнорируется регистр</li>
</ul>
</li>
<li>как регулярное выражение
<ul>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">screen.getByText(/world/i)</code> — поиск по подстроке, игнорируется регистр</li>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">screen.getByText(/^hello world$/i)</code> — поиск по полной строке, игнорируется регистр</li>
</ul>
</li>
<li>как функция
<ul>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">screen.getByText((content, element) => content.startsWith("Hello"))</code></li>
</ul>
</li>
</ul>
<hr/>
<ul>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">screen.getByLabelText('Username')</code> ищет элемент с соответствющим label</li>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">getByLabelText</code> хорошо подходит для полей формы</li>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">getByPlaceholderText</code> ищет по атрибуту placeholder</li>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">getByTitle</code> ищет по атрибуту title</li>
</ul>
<hr/>
<div class="m_5cb1b9c8 mantine-CodeHighlightTabs-root"><div style="--sa-corner-width:0px;--sa-corner-height:0px" class="m_7b14120b mantine-CodeHighlightTabs-filesScrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><div class="m_38d99e51 mantine-CodeHighlightTabs-files"><button class="mantine-focus-auto m_5cac2e62 mantine-CodeHighlightTabs-file m_87cf2631 mantine-UnstyledButton-root" data-active="true" type="button"><span>html</span></button><button class="mantine-focus-auto m_5cac2e62 mantine-CodeHighlightTabs-file m_87cf2631 mantine-UnstyledButton-root" type="button"><span>javascript</span></button></div></div></div><div data-orientation="horizontal" class="m_c44ba933 mantine-ScrollArea-scrollbar" data-hidden="true" style="position:absolute;--sa-thumb-width:18px" data-mantine-scrollbar="true"></div><div class="m_c44ba933 mantine-ScrollArea-scrollbar" data-hidden="true" data-orientation="vertical" style="position:absolute;--sa-thumb-height:18px" data-mantine-scrollbar="true"></div></div><div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlightTabs-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlightTabs-controls" data-with-offset="true"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlightTabs-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlightTabs-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlightTabs-pre" data-with-offset="true"><code class="m_5caae6d3 mantine-CodeHighlightTabs-code"><div id="app">
<label for="username-input">Username</label>
<input id="username-input" />
</div></code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlightTabs-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div></div><hr/>
<h1 id="heading-1-9">ByTestId</h1>
<div class="m_5cb1b9c8 mantine-CodeHighlightTabs-root"><div style="--sa-corner-width:0px;--sa-corner-height:0px" class="m_7b14120b mantine-CodeHighlightTabs-filesScrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><div class="m_38d99e51 mantine-CodeHighlightTabs-files"><button class="mantine-focus-auto m_5cac2e62 mantine-CodeHighlightTabs-file m_87cf2631 mantine-UnstyledButton-root" data-active="true" type="button"><span>html</span></button><button class="mantine-focus-auto m_5cac2e62 mantine-CodeHighlightTabs-file m_87cf2631 mantine-UnstyledButton-root" type="button"><span>javascript</span></button></div></div></div><div data-orientation="horizontal" class="m_c44ba933 mantine-ScrollArea-scrollbar" data-hidden="true" style="position:absolute;--sa-thumb-width:18px" data-mantine-scrollbar="true"></div><div class="m_c44ba933 mantine-ScrollArea-scrollbar" data-hidden="true" data-orientation="vertical" style="position:absolute;--sa-thumb-height:18px" data-mantine-scrollbar="true"></div></div><div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlightTabs-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlightTabs-controls" data-with-offset="true"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlightTabs-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlightTabs-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlightTabs-pre" data-with-offset="true"><code class="m_5caae6d3 mantine-CodeHighlightTabs-code"><div data-testid="mailbox" /></code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlightTabs-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div></div><ul>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">configure({testIdAttribute: 'data-my-test-attribute'})</code></li>
</ul>
<hr/>
<p>Расширение для браузеров Chrome и Firefox <code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">Testing Playground</code></p>
<hr/>
<h1 id="heading-1-10">Вызов событий</h1>
<hr/>
<p><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">fireEvent(node: HTMLElement, event: Event)</code></p>
<hr/>
<div class="m_5cb1b9c8 mantine-CodeHighlightTabs-root"><div style="--sa-corner-width:0px;--sa-corner-height:0px" class="m_7b14120b mantine-CodeHighlightTabs-filesScrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><div class="m_38d99e51 mantine-CodeHighlightTabs-files"><button class="mantine-focus-auto m_5cac2e62 mantine-CodeHighlightTabs-file m_87cf2631 mantine-UnstyledButton-root" data-active="true" type="button"><span>html</span></button><button class="mantine-focus-auto m_5cac2e62 mantine-CodeHighlightTabs-file m_87cf2631 mantine-UnstyledButton-root" type="button"><span>javascript</span></button></div></div></div><div data-orientation="horizontal" class="m_c44ba933 mantine-ScrollArea-scrollbar" data-hidden="true" style="position:absolute;--sa-thumb-width:18px" data-mantine-scrollbar="true"></div><div class="m_c44ba933 mantine-ScrollArea-scrollbar" data-hidden="true" data-orientation="vertical" style="position:absolute;--sa-thumb-height:18px" data-mantine-scrollbar="true"></div></div><div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlightTabs-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlightTabs-controls" data-with-offset="true"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlightTabs-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlightTabs-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlightTabs-pre" data-with-offset="true"><code class="m_5caae6d3 mantine-CodeHighlightTabs-code"><button>Submit</button></code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlightTabs-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div></div><hr/>
<p><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">fireEvent[eventName](node: HTMLElement, eventProperties: Object)</code></p>
<br/>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">fireEvent.change(getByPlaceholderText(/username/i), { target: { value: 'ruslan' } })
fireEvent.keyDown(getByRole('button'), { key: 'Enter', code: 'Enter' })</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<hr/>
<h1 id="heading-1-11">Асинхронность</h1>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">const button = screen.getByRole('button', { name: 'Login' })
fireEvent.click(button)
await screen.findByText('Hello')</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<hr/>
<p><strong><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">findBy</code> = <code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">getBy</code> + <code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">waitFor</code></strong></p>
<hr/>
<h1 id="heading-1-12">waitFor</h1>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">function waitFor<T>(
callback: () => T | Promise<T>,
options?: {
container?: HTMLElement // document по умолчанию
timeout?: number // 1000мс по умолчанию
interval?: number // 50мс по умолчанию
onTimeout?: (error: Error) => Error // ошибка и состояние контейнера по умолчанию
mutationObserverOptions?: MutationObserverInit // вызов колбека при изменениях
}
): Promise<T></code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<hr/>
<ul>
<li>
<p><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">await waitFor(() => screen.getByRole('alert'))</code></p>
</li>
<li>
<p><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">await waitFor(() => expect(mockAPI).toHaveBeenCalledTimes(1))</code></p>
</li>
<li>
<p>WaitForElementToBeRemoved</p>
</li>
<li>
<p>wrapper on <code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">waitFor</code></p>
</li>
</ul>
<hr/>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">const button = document.querySelector('button');
waitForElementToBeRemoved(document.querySelector('button')).then(() =>
console.log('Element button no longer in DOM');
);
// изменения игнорируются
button.setAttribute('data-is-submit', true);
// логирует строку 'Element button no longer in DOM'
button.parentElement.removeChild(button);</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<hr/>
<ul>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">fireEvent</code> подходит для большинства сценариев, НО</li>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">fireEvent.click</code> не порождает другие события:
<ul>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">fireEvent.mouseOver(element)</code></li>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">fireEvent.mouseMove(element)</code></li>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">fireEvent.mouseDown(element)</code></li>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">element.focus()</code> (если элемент допускает это)</li>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">fireEvent.mouseUp(element)</code></li>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">fireEvent.click(element)</code></li>
</ul>
</li>
</ul>
<hr/>
<h1 id="heading-1-13">Рефакторинг</h1>
<div class="m_5cb1b9c8 mantine-CodeHighlightTabs-root"><div style="--sa-corner-width:0px;--sa-corner-height:0px" class="m_7b14120b mantine-CodeHighlightTabs-filesScrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><div class="m_38d99e51 mantine-CodeHighlightTabs-files"><button class="mantine-focus-auto m_5cac2e62 mantine-CodeHighlightTabs-file m_87cf2631 mantine-UnstyledButton-root" data-active="true" type="button"><span>javascript</span></button><button class="mantine-focus-auto m_5cac2e62 mantine-CodeHighlightTabs-file m_87cf2631 mantine-UnstyledButton-root" type="button"><span>javascript</span></button></div></div></div><div data-orientation="horizontal" class="m_c44ba933 mantine-ScrollArea-scrollbar" data-hidden="true" style="position:absolute;--sa-thumb-width:18px" data-mantine-scrollbar="true"></div><div class="m_c44ba933 mantine-ScrollArea-scrollbar" data-hidden="true" data-orientation="vertical" style="position:absolute;--sa-thumb-height:18px" data-mantine-scrollbar="true"></div></div><div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlightTabs-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlightTabs-controls" data-with-offset="true"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlightTabs-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlightTabs-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlightTabs-pre" data-with-offset="true"><code class="m_5caae6d3 mantine-CodeHighlightTabs-code">// Было
fireEvent.focus(getByText('focus me'))</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlightTabs-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div></div><hr/>
<h1 id="heading-1-14">user-event</h1>
<p>Это вспомогательная библиотека для <code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">Testing Library</code>, которая обеспечивает более совершенное моделирование взаимодействия с браузером, чем встроенный метод fireEvent</p>
<hr/>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">test('types inside textarea', () => {
document.body.innerHTML = `<textarea />`
userEvent.type(screen.getByRole('textbox'), 'Hello, World!')
expect(screen.getByRole('textbox')).toHaveValue('Hello, World!')
})</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<hr/>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">test('click', () => {
render(`
<div>
<label for="checkbox">Check</label>
<input id="checkbox" type="checkbox" />
</div>
`)
userEvent.click(screen.getByText('Check'))
expect(screen.getByLabelText('Check')).toBeChecked()
})</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<hr/>
<h1 id="heading-1-15">user-event API</h1>
<ul>
<li>click / dbclick</li>
<li>hover / unhover</li>
<li>type</li>
<li>upload</li>
<li>selectOptions / deselectOptions</li>
<li>tab</li>
<li>paste</li>
</ul>
<hr/>
<h1 id="heading-1-16">Click</h1>
<p><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">click(element, eventInit, options)</code></p>
<hr/>
<p>Клики по элементу, могут иметь различные побочные эффекты в зависимости от элемента</p>
<div class="m_5cb1b9c8 mantine-CodeHighlightTabs-root"><div style="--sa-corner-width:0px;--sa-corner-height:0px" class="m_7b14120b mantine-CodeHighlightTabs-filesScrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><div class="m_38d99e51 mantine-CodeHighlightTabs-files"><button class="mantine-focus-auto m_5cac2e62 mantine-CodeHighlightTabs-file m_87cf2631 mantine-UnstyledButton-root" data-active="true" type="button"><span>html</span></button><button class="mantine-focus-auto m_5cac2e62 mantine-CodeHighlightTabs-file m_87cf2631 mantine-UnstyledButton-root" type="button"><span>javascript</span></button></div></div></div><div data-orientation="horizontal" class="m_c44ba933 mantine-ScrollArea-scrollbar" data-hidden="true" style="position:absolute;--sa-thumb-width:18px" data-mantine-scrollbar="true"></div><div class="m_c44ba933 mantine-ScrollArea-scrollbar" data-hidden="true" data-orientation="vertical" style="position:absolute;--sa-thumb-height:18px" data-mantine-scrollbar="true"></div></div><div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlightTabs-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlightTabs-controls" data-with-offset="true"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlightTabs-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlightTabs-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlightTabs-pre" data-with-offset="true"><code class="m_5caae6d3 mantine-CodeHighlightTabs-code"><div>
<label htmlFor="checkbox">Check</label>
<input id="checkbox" type="checkbox" />
</div></code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlightTabs-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div></div><hr/>
<ul>
<li>Клик вызовет сначала событие hover
Его можно отключить установив<code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">true</code> для параметра <code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">skipHover</code></li>
<li>Можно также вызывать клик с зажатыми клавишаи, ctrlClick / shiftClick / пр.
<ul>
<li><code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">userEvent.click(elem, { ctrlKey: true, shiftKey: true })</code></li>
</ul>
</li>
</ul>
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