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* @license
* Copyright 2026 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import { describe, it, expect, beforeEach, afterEach } from 'vitest';
import { TestRig, assertModelHasOutput } from './test-helper.js';
import { dirname, join } from 'node:path';
import { fileURLToPath } from 'node:url';
const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);
describe('browser-agent-localhost', () => {
let rig: TestRig;
const browserSettings = {
agents: {
overrides: {
browser_agent: {
enabled: true,
},
},
browser: {
headless: true,
sessionMode: 'isolated' as const,
},
},
};
beforeEach(() => {
rig = new TestRig();
});
afterEach(async () => {
await rig.cleanup();
});
it('should navigate to localhost fixture and read page content', async () => {
rig.setup('localhost-navigate', {
fakeResponsesPath: join(
__dirname,
'browser-agent-localhost.navigate.responses',
),
settings: browserSettings,
});
const result = await rig.run({
args: 'Navigate to http://127.0.0.1:18923/index.html and tell me the page title and list all links.',
});
assertModelHasOutput(result);
const toolLogs = rig.readToolLogs();
const browserAgentCall = toolLogs.find(
(t) =>
t.toolRequest.name === 'invoke_agent' &&
JSON.parse(t.toolRequest.args).agent_name === 'browser_agent',
);
expect(
browserAgentCall,
'Expected browser_agent to be called',
).toBeDefined();
});
it('should fill out and submit a form on localhost', async () => {
rig.setup('localhost-form', {
fakeResponsesPath: join(
__dirname,
'browser-agent-localhost.form.responses',
),
settings: browserSettings,
});
const result = await rig.run({
args: "Navigate to http://127.0.0.1:18923/form.html, fill in name='Test User', email='test@example.com', message='Hello World', and submit the form.",
});
assertModelHasOutput(result);
const toolLogs = rig.readToolLogs();
const browserAgentCall = toolLogs.find(
(t) =>
t.toolRequest.name === 'invoke_agent' &&
JSON.parse(t.toolRequest.args).agent_name === 'browser_agent',
);
expect(
browserAgentCall,
'Expected browser_agent to be called',
).toBeDefined();
});
it('should navigate through a multi-step flow', async () => {
rig.setup('localhost-multistep', {
fakeResponsesPath: join(
__dirname,
'browser-agent-localhost.multistep.responses',
),
settings: browserSettings,
});
const result = await rig.run({
args: "Go to http://127.0.0.1:18923/multi-step/step1.html, fill in 'testuser' as username, click Next, then click Finish on step 2. Report the result.",
});
assertModelHasOutput(result);
const toolLogs = rig.readToolLogs();
const browserAgentCall = toolLogs.find(
(t) =>
t.toolRequest.name === 'invoke_agent' &&
JSON.parse(t.toolRequest.args).agent_name === 'browser_agent',
);
expect(
browserAgentCall,
'Expected browser_agent to be called',
).toBeDefined();
});
it('should handle dynamically loaded content', async () => {
rig.setup('localhost-dynamic', {
fakeResponsesPath: join(
__dirname,
'browser-agent-localhost.dynamic.responses',
),
settings: browserSettings,
});
const result = await rig.run({
args: 'Navigate to http://127.0.0.1:18923/dynamic.html, wait for content to load, and tell me what items appear.',
});
assertModelHasOutput(result);
const toolLogs = rig.readToolLogs();
const browserAgentCall = toolLogs.find(
(t) =>
t.toolRequest.name === 'invoke_agent' &&
JSON.parse(t.toolRequest.args).agent_name === 'browser_agent',
);
expect(
browserAgentCall,
'Expected browser_agent to be called',
).toBeDefined();
});
it('should take a screenshot of localhost page', async () => {
rig.setup('localhost-screenshot', {
fakeResponsesPath: join(
__dirname,
'browser-agent-localhost.screenshot.responses',
),
settings: browserSettings,
});
const result = await rig.run({
args: 'Navigate to http://127.0.0.1:18923/index.html and take a screenshot.',
});
assertModelHasOutput(result);
const toolLogs = rig.readToolLogs();
const browserCalls = toolLogs.filter(
(t) =>
t.toolRequest.name === 'invoke_agent' &&
JSON.parse(t.toolRequest.args).agent_name === 'browser_agent',
);
expect(browserCalls.length).toBeGreaterThan(0);
});
});
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