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feat: add capability to load prompt instructions from a file #74

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915953d
feat: add capability to load prompt instructions from a file
Seburan Oct 10, 2025
f51cfcf
Merge branch 'main' into demos
Seburan Oct 14, 2025
ae68374
Merge branch 'main' into demos
Seburan Oct 24, 2025
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26 changes: 22 additions & 4 deletions main.py
View file
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Original file line number Diff line number Diff line change
Expand Up @@ -23,13 +23,19 @@

def main() -> int:
parser = argparse.ArgumentParser(description="Run the browser agent with a query.")
parser.add_argument(
query_group = parser.add_mutually_exclusive_group(required=True)
query_group.add_argument(
"--query",
type=str,
required=True,
help="The query for the browser agent to execute.",
)

query_group.add_argument(
"--query_file",
type=argparse.FileType("r", encoding="utf-8"),
help=(
"Path to a file containing the query for the browser agent to execute."
),
)
parser.add_argument(
"--env",
type=str,
Expand All @@ -56,6 +62,18 @@ def main() -> int:
)
args = parser.parse_args()

if args.query_file:
with args.query_file as f:
filename = f.name
query = f.read()
if not query.strip():
raise ValueError(
f"Query file '{filename}' is empty or contains only whitespace."
)
else:
# This branch is taken if --query is used.
query = args.query

if args.env == "playwright":
env = PlaywrightComputer(
screen_size=PLAYWRIGHT_SCREEN_SIZE,
Expand All @@ -73,7 +91,7 @@ def main() -> int:
with env as browser_computer:
agent = BrowserAgent(
browser_computer=browser_computer,
query=args.query,
query=query,
model_name=args.model,
)
agent.agent_loop()
Expand Down
65 changes: 62 additions & 3 deletions test_main.py
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Original file line number Diff line number Diff line change
Expand Up @@ -13,7 +13,7 @@
# limitations under the License.

import unittest
from unittest.mock import patch, MagicMock
from unittest.mock import patch, MagicMock, mock_open
import main

class TestMain(unittest.TestCase):
Expand All @@ -27,6 +27,7 @@ def test_main_playwright(self, mock_browser_agent, mock_playwright_computer, moc
mock_args.initial_url = 'test_url'
mock_args.highlight_mouse = True
mock_args.query = 'test_query'
mock_args.query_file = None
mock_args.model = 'test_model'
mock_args.api_server = None
mock_args.api_server_key = None
Expand All @@ -39,7 +40,11 @@ def test_main_playwright(self, mock_browser_agent, mock_playwright_computer, moc
initial_url='test_url',
highlight_mouse=True
)
mock_browser_agent.assert_called_once()
mock_browser_agent.assert_called_once_with(
browser_computer=mock_playwright_computer.return_value.__enter__.return_value,
query='test_query',
model_name='test_model',
)
mock_browser_agent.return_value.agent_loop.assert_called_once()

@patch('main.argparse.ArgumentParser')
Expand All @@ -49,6 +54,7 @@ def test_main_browserbase(self, mock_browser_agent, mock_browserbase_computer, m
mock_args = MagicMock()
mock_args.env = 'browserbase'
mock_args.query = 'test_query'
mock_args.query_file = None
mock_args.model = 'test_model'
mock_args.api_server = None
mock_args.api_server_key = None
Expand All @@ -62,8 +68,61 @@ def test_main_browserbase(self, mock_browser_agent, mock_browserbase_computer, m
screen_size=main.PLAYWRIGHT_SCREEN_SIZE,
initial_url='test_url'
)
mock_browser_agent.assert_called_once()
mock_browser_agent.assert_called_once_with(
browser_computer=mock_browserbase_computer.return_value.__enter__.return_value,
query='test_query',
model_name='test_model',
)
mock_browser_agent.return_value.agent_loop.assert_called_once()

@patch('main.argparse.ArgumentParser')
@patch('main.PlaywrightComputer')
@patch('main.BrowserAgent')
def test_main_with_query_file(self, mock_browser_agent, mock_playwright_computer, mock_arg_parser):
mock_args = MagicMock()
mock_args.env = 'playwright'
mock_args.initial_url = 'test_url'
mock_args.highlight_mouse = False
mock_args.query = None
# mock_open is used to simulate opening a file
m = mock_open(read_data='query from file')
# The file object needs a 'name' attribute for the error message
m.return_value.name = 'test_query.txt'
mock_args.query_file = m()
mock_args.model = 'test_model'
mock_args.api_server = None
mock_args.api_server_key = None
mock_arg_parser.return_value.parse_args.return_value = mock_args

main.main()

mock_playwright_computer.assert_called_once_with(
screen_size=main.PLAYWRIGHT_SCREEN_SIZE,
initial_url='test_url',
highlight_mouse=False
)
mock_browser_agent.assert_called_once_with(
browser_computer=mock_playwright_computer.return_value.__enter__.return_value,
query='query from file',
model_name='test_model',
)
mock_browser_agent.return_value.agent_loop.assert_called_once()

@patch('main.argparse.ArgumentParser')
def test_main_with_empty_query_file(self, mock_arg_parser):
mock_args = MagicMock()
mock_args.query = None
# Simulate an empty file
m = mock_open(read_data=' ')
m.return_value.name = 'empty.txt'
mock_args.query_file = m()
mock_arg_parser.return_value.parse_args.return_value = mock_args

with self.assertRaisesRegex(
ValueError, "Query file 'empty.txt' is empty or contains only whitespace."
):
main.main()


if __name__ == '__main__':
unittest.main()