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"""Test the bash utility."""
import re
import subprocess
import sys
from pathlib import Path
import pytest
from langchain_experimental.llm_bash.bash import BashProcess
@pytest.mark.skipif(
sys.platform.startswith("win"), reason="Test not supported on Windows"
)
def test_pwd_command() -> None:
"""Test correct functionality."""
session = BashProcess()
commands = ["pwd"]
output = session.run(commands)
assert output == subprocess.check_output("pwd", shell=True).decode()
@pytest.mark.skip(reason="flaky on GHA, TODO to fix")
@pytest.mark.skipif(
sys.platform.startswith("win"), reason="Test not supported on Windows"
)
def test_pwd_command_persistent() -> None:
"""Test correct functionality when the bash process is persistent."""
session = BashProcess(persistent=True, strip_newlines=True)
commands = ["pwd"]
output = session.run(commands)
assert subprocess.check_output("pwd", shell=True).decode().strip() in output
session.run(["cd .."])
new_output = session.run(["pwd"])
# Assert that the new_output is a parent of the old output
assert Path(output).parent == Path(new_output)
@pytest.mark.skipif(
sys.platform.startswith("win"), reason="Test not supported on Windows"
)
def test_incorrect_command() -> None:
"""Test handling of incorrect command."""
session = BashProcess()
output = session.run(["invalid_command"])
assert output == "Command 'invalid_command' returned non-zero exit status 127."
@pytest.mark.skipif(
sys.platform.startswith("win"), reason="Test not supported on Windows"
)
def test_incorrect_command_return_err_output() -> None:
"""Test optional returning of shell output on incorrect command."""
session = BashProcess(return_err_output=True)
output = session.run(["invalid_command"])
assert re.match(
r"^/bin/sh:.*invalid_command.*(?:not found|Permission denied).*$", output
)
@pytest.mark.skipif(
sys.platform.startswith("win"), reason="Test not supported on Windows"
)
def test_create_directory_and_files(tmp_path: Path) -> None:
"""Test creation of a directory and files in a temporary directory."""
session = BashProcess(strip_newlines=True)
# create a subdirectory in the temporary directory
temp_dir = tmp_path / "test_dir"
temp_dir.mkdir()
# run the commands in the temporary directory
commands = [
f"touch {temp_dir}/file1.txt",
f"touch {temp_dir}/file2.txt",
f"echo 'hello world' > {temp_dir}/file2.txt",
f"cat {temp_dir}/file2.txt",
]
output = session.run(commands)
assert output == "hello world"
# check that the files were created in the temporary directory
output = session.run([f"ls {temp_dir}"])
assert output == "file1.txt\nfile2.txt"
@pytest.mark.skip(reason="flaky on GHA, TODO to fix")
@pytest.mark.skipif(
sys.platform.startswith("win"), reason="Test not supported on Windows"
)
def test_create_bash_persistent() -> None:
"""Test the pexpect persistent bash terminal"""
session = BashProcess(persistent=True)
response = session.run("echo hello")
response += session.run("echo world")
assert "hello" in response
assert "world" in response
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