chrome-devtools-mcp/tests/tools/script.test.ts at 5a9de2d2a9e49ca3503959bba8337b803fd011e2 · ChromeDevTools/chrome-devtools-mcp · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import assert from 'node:assert';
import {describe, it} from 'node:test';

import {evaluateScript} from '../../src/tools/script.js';
import {serverHooks} from '../server.js';
import {html, withBrowser} from '../utils.js';

describe('script', () => {
  const server = serverHooks();

  describe('browser_evaluate_script', () => {
    it('evaluates', async () => {
      await withBrowser(async (response, context) => {
        await evaluateScript.handler(
          {params: {function: String(() => 2 * 5)}},
          response,
          context,
        );
        const lineEvaluation = response.responseLines.at(2)!;
        assert.strictEqual(JSON.parse(lineEvaluation), 10);
      });
    });
    it('runs in selected page', async () => {
      await withBrowser(async (response, context) => {
        await evaluateScript.handler(
          {params: {function: String(() => document.title)}},
          response,
          context,
        );

        let lineEvaluation = response.responseLines.at(2)!;
        assert.strictEqual(JSON.parse(lineEvaluation), '');

        const page = await context.newPage();
        await page.setContent(`
          <head>
            <title>New Page</title>
          </head>
        `);

        response.resetResponseLineForTesting();
        await evaluateScript.handler(
          {params: {function: String(() => document.title)}},
          response,
          context,
        );

        lineEvaluation = response.responseLines.at(2)!;
        assert.strictEqual(JSON.parse(lineEvaluation), 'New Page');
      });
    });

    it('work for complex objects', async () => {
      await withBrowser(async (response, context) => {
        const page = context.getSelectedPage();

        await page.setContent(html`<script src="./scripts.js"></script> `);

        await evaluateScript.handler(
          {
            params: {
              function: String(() => {
                const scripts = Array.from(
                  document.head.querySelectorAll('script'),
                ).map(s => ({src: s.src, async: s.async, defer: s.defer}));

                return {scripts};
              }),
            },
          },
          response,
          context,
        );
        const lineEvaluation = response.responseLines.at(2)!;
        assert.deepEqual(JSON.parse(lineEvaluation), {
          scripts: [],
        });
      });
    });

    it('work for async functions', async () => {
      await withBrowser(async (response, context) => {
        const page = context.getSelectedPage();

        await page.setContent(html`<script src="./scripts.js"></script> `);

        await evaluateScript.handler(
          {
            params: {
              function: String(async () => {
                await new Promise(res => setTimeout(res, 0));
                return 'Works';
              }),
            },
          },
          response,
          context,
        );
        const lineEvaluation = response.responseLines.at(2)!;
        assert.strictEqual(JSON.parse(lineEvaluation), 'Works');
      });
    });

    it('work with one argument', async () => {
      await withBrowser(async (response, context) => {
        const page = context.getSelectedPage();

        await page.setContent(html`<button id="test">test</button>`);

        await context.createTextSnapshot();

        await evaluateScript.handler(
          {
            params: {
              function: String(async (el: Element) => {
                return el.id;
              }),
              args: [{uid: '1_1'}],
            },
          },
          response,
          context,
        );
        const lineEvaluation = response.responseLines.at(2)!;
        assert.strictEqual(JSON.parse(lineEvaluation), 'test');
      });
    });

    it('work with multiple args', async () => {
      await withBrowser(async (response, context) => {
        const page = context.getSelectedPage();

        await page.setContent(html`<button id="test">test</button>`);

        await context.createTextSnapshot();

        await evaluateScript.handler(
          {
            params: {
              function: String((container: Element, child: Element) => {
                return container.contains(child);
              }),
              args: [{uid: '1_0'}, {uid: '1_1'}],
            },
          },
          response,
          context,
        );
        const lineEvaluation = response.responseLines.at(2)!;
        assert.strictEqual(JSON.parse(lineEvaluation), true);
      });
    });

    it('work for elements inside iframes', async () => {
      server.addHtmlRoute(
        '/iframe',
        html`<main><button>I am iframe button</button></main>`,
      );
      server.addHtmlRoute('/main', html`<iframe src="/iframe"></iframe>`);

      await withBrowser(async (response, context) => {
        const page = context.getSelectedPage();
        await page.goto(server.getRoute('/main'));
        await context.createTextSnapshot();
        await evaluateScript.handler(
          {
            params: {
              function: String((element: Element) => {
                return element.textContent;
              }),
              args: [{uid: '1_3'}],
            },
          },
          response,
          context,
        );
        const lineEvaluation = response.responseLines.at(2)!;
        assert.strictEqual(JSON.parse(lineEvaluation), 'I am iframe button');
      });
    });
  });
});