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import os.path

import re

import sys

from unittest import mock

import pytest

from pre_commit import error_handler

from pre_commit.util import CalledProcessError

from testing.util import cmd_output_mocked_pre_commit_home

@pytest.fixture

def mocked_log_and_exit():

with mock.patch.object(error_handler, '_log_and_exit') as log_and_exit:

yield log_and_exit

def test_error_handler_no_exception(mocked_log_and_exit):

with error_handler.error_handler():

pass

assert mocked_log_and_exit.call_count == 0

def test_error_handler_fatal_error(mocked_log_and_exit):

exc = error_handler.FatalError('just a test')

with error_handler.error_handler():

raise exc

mocked_log_and_exit.assert_called_once_with(

'An error has occurred',

exc,

# Tested below

mock.ANY,

)

assert re.match(

r'Traceback \(most recent call last\):\n'

r' File ".+pre_commit.error_handler.py", line \d+, in error_handler\n'

r' yield\n'

r' File ".+tests.error_handler_test.py", line \d+, '

r'in test_error_handler_fatal_error\n'

r' raise exc\n'

r'(pre_commit\.error_handler\.)?FatalError: just a test\n',

mocked_log_and_exit.call_args[0][2],

)

def test_error_handler_uncaught_error(mocked_log_and_exit):

exc = ValueError('another test')

with error_handler.error_handler():

raise exc

mocked_log_and_exit.assert_called_once_with(

'An unexpected error has occurred',

exc,

# Tested below

mock.ANY,

)

assert re.match(

r'Traceback \(most recent call last\):\n'

r' File ".+pre_commit.error_handler.py", line \d+, in error_handler\n'

r' yield\n'

r' File ".+tests.error_handler_test.py", line \d+, '

r'in test_error_handler_uncaught_error\n'

r' raise exc\n'

r'ValueError: another test\n',

mocked_log_and_exit.call_args[0][2],

)

def test_error_handler_keyboardinterrupt(mocked_log_and_exit):

exc = KeyboardInterrupt()

with error_handler.error_handler():

raise exc

mocked_log_and_exit.assert_called_once_with(

'Interrupted (^C)',

exc,

# Tested below

mock.ANY,

)

assert re.match(

r'Traceback \(most recent call last\):\n'

r' File ".+pre_commit.error_handler.py", line \d+, in error_handler\n'

r' yield\n'

r' File ".+tests.error_handler_test.py", line \d+, '

r'in test_error_handler_keyboardinterrupt\n'

r' raise exc\n'

r'KeyboardInterrupt\n',

mocked_log_and_exit.call_args[0][2],

)

def test_log_and_exit(cap_out, mock_store_dir):

with pytest.raises(SystemExit):

error_handler._log_and_exit(

'msg', error_handler.FatalError('hai'), "I'm a stacktrace",

)

printed = cap_out.get()

log_file = os.path.join(mock_store_dir, 'pre-commit.log')

assert printed == f'msg: FatalError: hai\nCheck the log at {log_file}\n'

assert os.path.exists(log_file)

with open(log_file) as f:

logged = f.read()

expected = (

r'^### version information\n'

r'\n'

r'```\n'

r'pre-commit version: \d+\.\d+\.\d+\n'

r'sys.version:\n'

r'( .*\n)*'

r'sys.executable: .*\n'

r'os.name: .*\n'

r'sys.platform: .*\n'

r'```\n'

r'\n'

r'### error information\n'

r'\n'

r'```\n'

r'msg: FatalError: hai\n'

r'```\n'

r'\n'

r'```\n'

r"I'm a stacktrace\n"

r'```\n'

)

assert re.match(expected, logged)

def test_error_handler_non_ascii_exception(mock_store_dir):

with pytest.raises(SystemExit):

with error_handler.error_handler():

raise ValueError('☃')

def test_error_handler_non_utf8_exception(mock_store_dir):

with pytest.raises(SystemExit):

with error_handler.error_handler():

raise CalledProcessError(1, ('exe',), 0, b'error: \xa0\xe1', b'')

def test_error_handler_non_stringable_exception(mock_store_dir):

class C(Exception):

def __str__(self):

raise RuntimeError('not today!')

with pytest.raises(SystemExit):

with error_handler.error_handler():

raise C()

def test_error_handler_no_tty(tempdir_factory):

pre_commit_home = tempdir_factory.get()

ret, out, _ = cmd_output_mocked_pre_commit_home(

sys.executable,

'-c',

'from pre_commit.error_handler import error_handler\n'

'with error_handler():\n'

' raise ValueError("\\u2603")\n',

retcode=1,

tempdir_factory=tempdir_factory,

pre_commit_home=pre_commit_home,

)

log_file = os.path.join(pre_commit_home, 'pre-commit.log')

out_lines = out.splitlines()

assert out_lines[-2] == 'An unexpected error has occurred: ValueError: ☃'

assert out_lines[-1] == f'Check the log at {log_file}'

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