Playwright：用于高效测试的实用程序中的 GraphQL 请求-js教程-PHP中文网

Playwright：用于高效测试的实用程序中的 GraphQL 请求

霞舞

发布： 2024-11-24 08:36:13

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playwright：用于高效测试的实用程序中的 graphql 请求

使用 playwright 等端到端测试框架时，模拟 graphql 请求可以显着提高测试可靠性和速度。受到 jay freestone 优秀博客文章 stubbing graphql requests in playwright 的启发，我决定构建一个可重用的实用函数，允许灵活的 graphql 请求拦截和响应存根。

在这篇文章中，我将引导您完成拦截gql实用程序的实现，并演示如何将其与 playwright 一起使用来模拟 graphql 查询和突变的服务器响应。

interceptgql 实用程序：它是如何工作的

interceptgql 实用程序为后端的所有 graphql 请求注册一个路由处理程序，根据操作名称拦截特定操作。您可以定义每个操作应如何响应并验证请求中传递的变量。

这是实现：

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import { test as basetest, page, route } from '@playwright/test';
import { namedoperations } from '../../src/graphql/autogenerate/operations';

type calledwith = record<string, unknown>;

type operations = keyof (typeof namedoperations)['query'] | keyof (typeof namedoperations)['mutation'];

type interceptconfig = {
  operationname: operations | string;
  res: record<string, unknown>;
};

type interceptedpayloads = {
  [operationname: string]: calledwith[];
};

export async function interceptgql(
  page: page,
  interceptconfigs: interceptconfig[]
): promise<{ reqs: interceptedpayloads }> {
  const reqs: interceptedpayloads = {};

  interceptconfigs.foreach(config => {
    reqs[config.operationname] = [];
  });

  await page.route('**/graphql', (route: route) => {
    const req = route.request().postdatajson();
    const operationconfig = interceptconfigs.find(config => config.operationname === req.operationname);

    if (!operationconfig) {
      return route.continue();
    }

    reqs[req.operationname].push(req.variables);

    return route.fulfill({
      status: 200,
      contenttype: 'application/json',
      body: json.stringify({ data: operationconfig.res }),
    });
  });

  return { reqs };
}

export const test = basetest.extend<{ interceptgql: typeof interceptgql }>({
  interceptgql: async ({ browser }, use) => {
    await use(interceptgql);
  },
});

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示例：测试任务管理仪表板

为了演示该实用程序的实际效果，让我们用它来测试任务管理仪表板。我们将拦截 graphql 查询 (gettasks) 并模拟其响应。

import { expect } from '@playwright/test';
import { namedOperations } from '../../../src/graphql/autogenerate/operations';
import { test } from '../../fixtures';
import { GetTasksMock } from './mocks/GetTasks.mock';

test.describe('Task Management Dashboard', () => {
  test.beforeEach(async ({ page, interceptGQL }) => {
    await page.goto('/tasks');

    await interceptGQL(page, [
      {
        operationName: namedOperations.Query['GetTasks'],
        res: GetTasksMock,
      },
    ]);
  });

  test('Should render a list of tasks', async ({ page }) => {
    const taskDashboardTitle = page.getByTestId('task-dashboard-title');
    await expect(taskDashboardTitle).toHaveText('Task Dashboard');

    const firstTaskTitle = page.getByTestId('0-task-title');
    await expect(firstTaskTitle).toHaveText('Implement authentication flow');

    const firstTaskStatus = page.getByTestId('0-task-status');
    await expect(firstTaskStatus).toHaveText('In Progress');
  });

  test('Should navigate to task details page when a task is clicked', async ({ page }) => {
    await page.getByTestId('0-task-title').click();

    await expect(page.getByTestId('task-details-header')).toHaveText('Task Details');
    await expect(page.getByTestId('task-details-title')).toHaveText('Implement authentication flow');
  });
});

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