chrome-devtools-mcp/tests/tools/console.test.ts at 850c32811e4ebb2c1d393b5c8431bd78dfdd5b8a · ChromeDevTools/chrome-devtools-mcp · GitHub

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/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import assert from 'node:assert';
import {before, describe, it} from 'node:test';

import {loadIssueDescriptions} from '../../src/issue-descriptions.js';
import {
  getConsoleMessage,
  listConsoleMessages,
} from '../../src/tools/console.js';
import {withBrowser} from '../utils.js';

describe('console', () => {
  describe('list_console_messages', () => {
    before(async () => {
      await loadIssueDescriptions();
    });

    it('list messages', async () => {
      await withBrowser(async (response, context) => {
        await listConsoleMessages.handler({params: {}}, response, context);
        assert.ok(response.includeConsoleData);
      });
    });

    it('lists error messages', async () => {
      await withBrowser(async (response, context) => {
        const page = await context.newPage();
        await page.setContent(
          '<script>console.error("This is an error")</script>',
        );
        await listConsoleMessages.handler({params: {}}, response, context);
        const formattedResponse = await response.handle('test', context);
        const textContent = formattedResponse[0] as {text: string};
        assert.ok(
          textContent.text.includes('msgid=1 [error] This is an error'),
        );
      });
    });

    it('lists issues', async () => {
      await withBrowser(async (response, context) => {
        const page = await context.newPage();
        const issuePromise = new Promise<void>(resolve => {
          page.once('issue', () => {
            resolve();
          });
        });
        await page.setContent('<input type="text" name="username" />');
        await issuePromise;
        await listConsoleMessages.handler({params: {}}, response, context);
        const formattedResponse = await response.handle('test', context);
        const textContent = formattedResponse[0] as {text: string};
        assert.ok(
          textContent.text.includes(
            `msgid=1 [issue] An element doesn't have an autocomplete attribute (count: 1)`,
          ),
        );
      });
    });

    it('lists issues after a page reload', async () => {
      await withBrowser(async (response, context) => {
        const page = await context.newPage();
        const issuePromise = new Promise<void>(resolve => {
          page.once('issue', () => {
            resolve();
          });
        });

        await page.setContent('<input type="text" name="username" />');
        await issuePromise;
        await listConsoleMessages.handler({params: {}}, response, context);
        {
          const formattedResponse = await response.handle('test', context);
          const textContent = formattedResponse[0] as {text: string};
          assert.ok(
            textContent.text.includes(
              `msgid=1 [issue] An element doesn't have an autocomplete attribute (count: 1)`,
            ),
          );
        }

        const anotherIssuePromise = new Promise<void>(resolve => {
          page.once('issue', () => {
            resolve();
          });
        });
        await page.reload();
        await page.setContent('<input type="text" name="username" />');
        await anotherIssuePromise;
        {
          const formattedResponse = await response.handle('test', context);
          const textContent = formattedResponse[0] as {text: string};
          assert.ok(
            textContent.text.includes(
              `msgid=2 [issue] An element doesn't have an autocomplete attribute (count: 1)`,
            ),
          );
        }
      });
    });

    it('work with primitive unhandled errors', async () => {
      await withBrowser(async (response, context) => {
        const page = await context.newPage();
        await page.setContent('<script>throw undefined;</script>');
        await listConsoleMessages.handler({params: {}}, response, context);
        const formattedResponse = await response.handle('test', context);
        const textContent = formattedResponse[0] as {text: string};
        assert.ok(
          textContent.text.includes('msgid=1 [error] undefined (0 args)'),
        );
      });
    });
  });

  describe('get_console_message', () => {
    it('gets a specific console message', async () => {
      await withBrowser(async (response, context) => {
        const page = await context.newPage();
        await page.setContent(
          '<script>console.error("This is an error")</script>',
        );
        // The list is needed to populate the console messages in the context.
        await listConsoleMessages.handler({params: {}}, response, context);
        await getConsoleMessage.handler(
          {params: {msgid: 1}},
          response,
          context,
        );
        const formattedResponse = await response.handle('test', context);
        const textContent = formattedResponse[0] as {text: string};
        assert.ok(
          textContent.text.includes('msgid=1 [error] This is an error'),
          'Should contain console message body',
        );
      });
    });
  });
});