2025-07-16 16:40:00 -07:00
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/**
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* Copyright (c) Microsoft Corporation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import { test, expect } from './fixtures.js';
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test('browser_evaluate', async ({ client, server }) => {
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expect(await client.callTool({
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name: 'browser_navigate',
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arguments: { url: server.HELLO_WORLD },
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})).toContainTextContent(`- Page Title: Title`);
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const result = await client.callTool({
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name: 'browser_evaluate',
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arguments: {
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function: '() => document.title',
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},
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});
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expect(result).toContainTextContent(`"Title"`);
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});
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test('browser_evaluate (element)', async ({ client, server }) => {
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server.setContent('/', `
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<body style="background-color: red">Hello, world!</body>
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`, 'text/html');
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await client.callTool({
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name: 'browser_navigate',
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arguments: { url: server.PREFIX },
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});
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expect(await client.callTool({
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name: 'browser_evaluate',
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arguments: {
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function: 'element => element.style.backgroundColor',
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element: 'body',
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ref: 'e1',
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},
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})).toContainTextContent(`- Result: "red"`);
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});
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2025-07-18 18:49:06 +00:00
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2025-07-18 19:52:18 +00:00
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test('browser_evaluate (error)', async ({ client, server, mcpBrowser }) => {
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2025-07-18 18:49:06 +00:00
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expect(await client.callTool({
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name: 'browser_navigate',
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arguments: { url: server.HELLO_WORLD },
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})).toContainTextContent(`- Page Title: Title`);
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// Test with a bogus expression that will cause a JavaScript error
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const result = await client.callTool({
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name: 'browser_evaluate',
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arguments: {
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function: '() => { undefinedVariable.nonExistentMethod(); }',
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},
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});
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// Check that error MCP response is returned
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expect(result.isError).toBe(true);
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// Check that JavaScript error details are contained in the response
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2025-07-18 19:52:18 +00:00
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if (mcpBrowser === 'webkit') {
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// Webkit has different error message format
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expect(result.content?.[0].text).toContain('undefinedVariable is not defined');
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} else {
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// Chrome, Firefox, etc. include the Playwright evaluation context
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expect(result.content?.[0].text).toContain('page._evaluateFunction');
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expect(result.content?.[0].text).toContain('undefinedVariable is not defined');
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}
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2025-07-18 18:49:06 +00:00
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});
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