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164 lines
4.8 KiB
Python
164 lines
4.8 KiB
Python
import pytest
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from pytest_httpserver import HTTPServer
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from browser_use.agent.service import Agent
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from browser_use.browser.events import NavigateToUrlEvent
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from browser_use.browser.profile import BrowserProfile
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from browser_use.browser.session import BrowserSession
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from tests.ci.conftest import create_mock_llm
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@pytest.fixture(scope='session')
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def http_server():
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"""Create and provide a test HTTP server for screenshot tests."""
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server = HTTPServer()
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server.start()
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# Route: Page with visible content for screenshot testing
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server.expect_request('/screenshot-page').respond_with_data(
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"""
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<!DOCTYPE html>
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<html>
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<head>
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<title>Screenshot Test Page</title>
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<style>
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body { font-family: Arial; padding: 20px; background: #f0f0f0; }
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h1 { color: #333; font-size: 32px; }
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.content { background: white; padding: 20px; border-radius: 8px; margin: 10px 0; }
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</style>
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</head>
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<body>
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<h1>Screenshot Test Page</h1>
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<div class="content">
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<p>This page is used to test screenshot capture with vision enabled.</p>
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<p>The agent should capture a screenshot when navigating to this page.</p>
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</div>
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</body>
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</html>
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""",
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content_type='text/html',
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)
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yield server
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server.stop()
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@pytest.fixture(scope='session')
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def base_url(http_server):
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"""Return the base URL for the test HTTP server."""
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return f'http://{http_server.host}:{http_server.port}'
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@pytest.fixture(scope='function')
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async def browser_session():
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session = BrowserSession(browser_profile=BrowserProfile(headless=True))
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await session.start()
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yield session
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await session.kill()
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@pytest.mark.asyncio
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async def test_basic_screenshots(browser_session: BrowserSession, httpserver):
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"""Navigate to a local page and ensure screenshot helpers return bytes."""
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html = """
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<html><body><h1 id='title'>Hello</h1><p>Screenshot demo.</p></body></html>
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"""
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httpserver.expect_request('/demo').respond_with_data(html, content_type='text/html')
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url = httpserver.url_for('/demo')
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nav = browser_session.event_bus.dispatch(NavigateToUrlEvent(url=url, new_tab=False))
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await nav
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data = await browser_session.take_screenshot(full_page=False)
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assert data, 'Viewport screenshot returned no data'
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element = await browser_session.screenshot_element('h1')
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assert element, 'Element screenshot returned no data'
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async def test_agent_screenshot_with_vision_enabled(browser_session, base_url):
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"""Test that agent captures screenshots when vision is enabled.
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This integration test verifies that:
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1. Agent with vision=True navigates to a page
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2. After prepare_context/update message manager, screenshot is captured
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3. Screenshot is included in the agent's history state
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"""
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# Create mock LLM actions
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actions = [
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f"""
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{{
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"thinking": "I'll navigate to the screenshot test page",
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"evaluation_previous_goal": "Starting task",
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"memory": "Navigating to page",
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"next_goal": "Navigate to test page",
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"action": [
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{{
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"navigate": {{
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"url": "{base_url}/screenshot-page",
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"new_tab": false
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}}
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}}
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]
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}}
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""",
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"""
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{
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"thinking": "Page loaded, completing task",
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"evaluation_previous_goal": "Page loaded",
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"memory": "Task completed",
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"next_goal": "Complete task",
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"action": [
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{
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"done": {
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"text": "Successfully navigated and captured screenshot",
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"success": true
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}
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}
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]
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}
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""",
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]
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mock_llm = create_mock_llm(actions=actions)
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# Create agent with vision enabled
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agent = Agent(
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task=f'Navigate to {base_url}/screenshot-page',
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llm=mock_llm,
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browser_session=browser_session,
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use_vision=True, # Enable vision/screenshots
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)
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# Run agent
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history = await agent.run(max_steps=2)
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# Verify agent completed successfully
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assert len(history) >= 1, 'Agent should have completed at least 1 step'
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final_result = history.final_result()
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assert final_result is not None, 'Agent should return a final result'
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# Verify screenshots were captured in the history
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screenshot_found = False
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for i, step in enumerate(history.history):
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# Check if browser state has screenshot path
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if step.state and hasattr(step.state, 'screenshot_path') and step.state.screenshot_path:
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screenshot_found = True
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print(f'\n✅ Step {i + 1}: Screenshot captured at {step.state.screenshot_path}')
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# Verify screenshot file exists (it should be saved to disk)
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import os
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assert os.path.exists(step.state.screenshot_path), f'Screenshot file should exist at {step.state.screenshot_path}'
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# Verify screenshot file has content
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screenshot_size = os.path.getsize(step.state.screenshot_path)
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assert screenshot_size > 0, f'Screenshot file should have content, got {screenshot_size} bytes'
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print(f' Screenshot size: {screenshot_size} bytes')
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assert screenshot_found, 'At least one screenshot should be captured when vision is enabled'
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print('\n🎉 Integration test passed: Screenshots are captured correctly with vision enabled')
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