404 lines
15 KiB
Python
404 lines
15 KiB
Python
# Copyright (c) 2006-2014 LOGILAB S.A. (Paris, FRANCE) <contact@logilab.fr>
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# Copyright (c) 2014 Google, Inc.
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# Copyright (c) 2014-2016 Claudiu Popa <pcmanticore@gmail.com>
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# Licensed under the GPL: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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# For details: https://github.com/PyCQA/pylint/blob/master/COPYING
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import contextlib
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import json
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import re
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import sys
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import os
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from os.path import join, dirname, abspath
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import tempfile
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import textwrap
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import six
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from pylint.lint import Run
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from pylint.reporters import BaseReporter
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from pylint.reporters.text import *
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from pylint.reporters.json import JSONReporter
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import pytest
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HERE = abspath(dirname(__file__))
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@contextlib.contextmanager
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def _patch_streams(out):
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sys.stderr = sys.stdout = out
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try:
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yield
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finally:
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sys.stderr = sys.__stderr__
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sys.stdout = sys.__stdout__
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@contextlib.contextmanager
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def _configure_lc_ctype(lc_ctype):
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lc_ctype_env = 'LC_CTYPE'
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original_lctype = os.environ.get(lc_ctype_env)
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os.environ[lc_ctype_env] = lc_ctype
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try:
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yield
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finally:
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os.environ.pop(lc_ctype_env)
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if original_lctype:
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os.environ[lc_ctype_env] = original_lctype
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class MultiReporter(BaseReporter):
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def __init__(self, reporters):
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self._reporters = reporters
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self.path_strip_prefix = os.getcwd() + os.sep
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def on_set_current_module(self, *args, **kwargs):
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for rep in self._reporters:
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rep.on_set_current_module(*args, **kwargs)
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def handle_message(self, msg):
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for rep in self._reporters:
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rep.handle_message(msg)
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def display_reports(self, layout):
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pass
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@property
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def out(self):
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return self._reporters[0].out
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@property
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def linter(self):
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return self._linter
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@linter.setter
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def linter(self, value):
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self._linter = value
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for rep in self._reporters:
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rep.linter = value
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class TestRunTC(object):
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def _runtest(self, args, reporter=None, out=None, code=28):
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if out is None:
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out = six.StringIO()
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pylint_code = self._run_pylint(args, reporter=reporter, out=out)
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if reporter:
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output = reporter.out.getvalue()
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elif hasattr(out, 'getvalue'):
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output = out.getvalue()
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else:
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output = None
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msg = 'expected output status %s, got %s' % (code, pylint_code)
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if output is not None:
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msg = '%s. Below pylint output: \n%s' % (msg, output)
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assert pylint_code == code, msg
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def _run_pylint(self, args, out, reporter=None):
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args = args + ['--persistent=no']
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with _patch_streams(out):
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with pytest.raises(SystemExit) as cm:
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with warnings.catch_warnings():
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warnings.simplefilter("ignore")
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Run(args, reporter=reporter)
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return cm.value.code
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def _test_output(self, args, expected_output):
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out = six.StringIO()
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self._run_pylint(args, out=out)
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actual_output = out.getvalue()
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assert expected_output.strip() in actual_output.strip()
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def test_pkginfo(self):
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"""Make pylint check itself."""
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self._runtest(['pylint.__pkginfo__'], reporter=TextReporter(six.StringIO()),
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code=0)
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def test_all(self):
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"""Make pylint check itself."""
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reporters = [
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TextReporter(six.StringIO()),
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ColorizedTextReporter(six.StringIO()),
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JSONReporter(six.StringIO())
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]
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self._runtest(['pylint/test/functional/arguments.py'],
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reporter=MultiReporter(reporters), code=1)
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def test_no_ext_file(self):
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self._runtest([join(HERE, 'input', 'noext')], code=0)
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def test_w0704_ignored(self):
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self._runtest([join(HERE, 'input', 'ignore_except_pass_by_default.py')], code=0)
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def test_generate_config_option(self):
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self._runtest(['--generate-rcfile'], code=0)
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def test_generate_config_option_order(self):
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out1 = six.StringIO()
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out2 = six.StringIO()
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self._runtest(['--generate-rcfile'], code=0, out=out1)
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self._runtest(['--generate-rcfile'], code=0, out=out2)
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output1 = out1.getvalue()
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output2 = out2.getvalue()
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assert output1 == output2
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def test_generate_config_disable_symbolic_names(self):
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# Test that --generate-rcfile puts symbolic names in the --disable
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# option.
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out = six.StringIO()
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self._run_pylint(["--generate-rcfile", "--rcfile="], out=out)
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output = out.getvalue()
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# Get rid of the pesky messages that pylint emits if the
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# configuration file is not found.
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master = re.search(r"\[MASTER", output)
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out = six.StringIO(output[master.start():])
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parser = six.moves.configparser.RawConfigParser()
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parser.readfp(out)
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messages = parser.get('MESSAGES CONTROL', 'disable').split(",")
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assert 'suppressed-message' in messages
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def test_generate_rcfile_no_obsolete_methods(self):
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out = six.StringIO()
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self._run_pylint(["--generate-rcfile"], out=out)
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output = out.getvalue()
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assert "profile" not in output
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def test_help_message_option(self):
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self._runtest(['--help-msg', 'W0101'], code=0)
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def test_error_help_message_option(self):
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self._runtest(['--help-msg', 'WX101'], code=0)
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def test_error_missing_arguments(self):
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self._runtest([], code=32)
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def test_no_out_encoding(self):
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"""test redirection of stdout with non ascii caracters
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"""
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#This test reproduces bug #48066 ; it happens when stdout is redirected
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# through '>' : the sys.stdout.encoding becomes then None, and if the
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# output contains non ascii, pylint will crash
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if sys.version_info < (3, 0):
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strio = tempfile.TemporaryFile()
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else:
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strio = six.StringIO()
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assert strio.encoding is None
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self._runtest([join(HERE, 'regrtest_data/no_stdout_encoding.py'),
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'--enable=all'],
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out=strio, code=28)
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def test_parallel_execution(self):
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self._runtest(['-j 2', 'pylint/test/functional/arguments.py',
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'pylint/test/functional/bad_continuation.py'], code=1)
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def test_parallel_execution_missing_arguments(self):
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self._runtest(['-j 2', 'not_here', 'not_here_too'], code=1)
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def test_py3k_option(self):
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# Test that --py3k flag works.
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rc_code = 2 if six.PY2 else 0
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self._runtest([join(HERE, 'functional', 'unpacked_exceptions.py'),
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'--py3k'],
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code=rc_code)
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def test_py3k_jobs_option(self):
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rc_code = 2 if six.PY2 else 0
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self._runtest([join(HERE, 'functional', 'unpacked_exceptions.py'),
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'--py3k', '-j 2'],
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code=rc_code)
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@pytest.mark.skipif(sys.version_info[0] > 2, reason="Requires the --py3k flag.")
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def test_py3k_commutative_with_errors_only(self):
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# Test what gets emitted with -E only
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module = join(HERE, 'regrtest_data', 'py3k_error_flag.py')
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expected = textwrap.dedent("""
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************* Module py3k_error_flag
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Explicit return in __init__
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""")
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self._test_output([module, "-E", "--msg-template='{msg}'"],
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expected_output=expected)
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# Test what gets emitted with -E --py3k
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expected = textwrap.dedent("""
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************* Module py3k_error_flag
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Use raise ErrorClass(args) instead of raise ErrorClass, args.
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""")
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self._test_output([module, "-E", "--py3k", "--msg-template='{msg}'"],
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expected_output=expected)
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# Test what gets emitted with --py3k -E
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self._test_output([module, "--py3k", "-E", "--msg-template='{msg}'"],
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expected_output=expected)
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def test_abbreviations_are_not_supported(self):
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expected = "no such option: --load-plugin"
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self._test_output([".", "--load-plugin"], expected_output=expected)
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def test_enable_all_works(self):
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module = join(HERE, 'data', 'clientmodule_test.py')
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expected = textwrap.dedent("""
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************* Module data.clientmodule_test
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W: 10, 8: Unused variable 'local_variable' (unused-variable)
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C: 18, 4: Missing method docstring (missing-docstring)
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C: 22, 0: Missing class docstring (missing-docstring)
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""")
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self._test_output([module, "--disable=all", "--enable=all", "-rn"],
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expected_output=expected)
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def test_wrong_import_position_when_others_disabled(self):
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expected_output = textwrap.dedent('''
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************* Module wrong_import_position
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C: 11, 0: Import "import os" should be placed at the top of the module (wrong-import-position)
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''')
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module1 = join(HERE, 'regrtest_data', 'import_something.py')
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module2 = join(HERE, 'regrtest_data', 'wrong_import_position.py')
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args = [module2, module1,
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"--disable=all", "--enable=wrong-import-position",
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"-rn", "-sn"]
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out = six.StringIO()
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self._run_pylint(args, out=out)
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actual_output = out.getvalue().strip()
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to_remove = "No config file found, using default configuration"
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if to_remove in actual_output:
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actual_output = actual_output[len(to_remove):]
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assert expected_output.strip() == actual_output.strip()
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def test_import_itself_not_accounted_for_relative_imports(self):
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expected = 'Your code has been rated at 10.00/10'
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package = join(HERE, 'regrtest_data', 'dummy')
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self._test_output([package, '--disable=locally-disabled', '-rn'],
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expected_output=expected)
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def test_reject_empty_indent_strings(self):
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expected = "indent string can't be empty"
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module = join(HERE, 'data', 'clientmodule_test.py')
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self._test_output([module, '--indent-string='],
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expected_output=expected)
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def test_json_report_when_file_has_syntax_error(self):
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out = six.StringIO()
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module = join(HERE, 'regrtest_data', 'syntax_error.py')
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self._runtest([module], code=2, reporter=JSONReporter(out))
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output = json.loads(out.getvalue())
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assert isinstance(output, list)
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assert len(output) == 1
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assert isinstance(output[0], dict)
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expected = {
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"obj": "",
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"column": 0,
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"line": 1,
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"type": "error",
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"symbol": "syntax-error",
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"module": "syntax_error"
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}
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message = output[0]
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for key, value in expected.items():
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assert key in message
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assert message[key] == value
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assert 'invalid syntax' in message['message'].lower()
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def test_json_report_when_file_is_missing(self):
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out = six.StringIO()
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module = join(HERE, 'regrtest_data', 'totally_missing.py')
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self._runtest([module], code=1, reporter=JSONReporter(out))
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output = json.loads(out.getvalue())
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assert isinstance(output, list)
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assert len(output) == 1
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assert isinstance(output[0], dict)
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expected = {
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"obj": "",
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"column": 0,
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"line": 1,
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"type": "fatal",
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"symbol": "fatal",
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"module": module
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}
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message = output[0]
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for key, value in expected.items():
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assert key in message
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assert message[key] == value
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assert message['message'].startswith("No module named")
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def test_information_category_disabled_by_default(self):
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expected = 'Your code has been rated at 10.00/10'
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path = join(HERE, 'regrtest_data', 'meta.py')
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self._test_output([path], expected_output=expected)
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def test_error_mode_shows_no_score(self):
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expected_output = textwrap.dedent('''
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************* Module application_crash
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E: 1, 6: Undefined variable 'something_undefined' (undefined-variable)
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''')
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module = join(HERE, 'regrtest_data', 'application_crash.py')
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self._test_output([module, "-E"], expected_output=expected_output)
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def test_evaluation_score_shown_by_default(self):
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expected_output = 'Your code has been rated at '
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module = join(HERE, 'regrtest_data', 'application_crash.py')
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self._test_output([module], expected_output=expected_output)
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def test_confidence_levels(self):
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expected = 'Your code has been rated at'
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path = join(HERE, 'regrtest_data', 'meta.py')
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self._test_output([path, "--confidence=HIGH,INFERENCE"],
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expected_output=expected)
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def test_bom_marker(self):
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path = join(HERE, 'regrtest_data', 'meta.py')
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config_path = join(HERE, 'regrtest_data', '.pylintrc')
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expected = 'Your code has been rated at 10.00/10'
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self._test_output([path, "--rcfile=%s" % config_path, "-rn"],
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expected_output=expected)
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def test_pylintrc_plugin_duplicate_options(self):
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dummy_plugin_path = join(HERE, 'regrtest_data', 'dummy_plugin')
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# Enable --load-plugins=dummy_plugin
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sys.path.append(dummy_plugin_path)
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config_path = join(HERE, 'regrtest_data', 'dummy_plugin.rc')
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expected = (
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":dummy-message-01 (I9061): *Dummy short desc 01*\n"
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" Dummy long desc This message belongs to the dummy_plugin checker.\n\n"
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":dummy-message-02 (I9060): *Dummy short desc 02*\n"
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" Dummy long desc This message belongs to the dummy_plugin checker.")
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self._test_output(["--rcfile=%s" % config_path,
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"--help-msg=dummy-message-01,dummy-message-02"],
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expected_output=expected)
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expected = (
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"[DUMMY_PLUGIN]\n\n# Dummy option 1\ndummy_option_1=dummy value 1\n\n"
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"# Dummy option 2\ndummy_option_2=dummy value 2")
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self._test_output(["--rcfile=%s" % config_path, "--generate-rcfile"],
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expected_output=expected)
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sys.path.remove(dummy_plugin_path)
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def test_pylintrc_comments_in_values(self):
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path = join(HERE, 'regrtest_data', 'test_pylintrc_comments.py')
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config_path = join(HERE, 'regrtest_data', 'comments_pylintrc')
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expected = textwrap.dedent('''
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************* Module test_pylintrc_comments
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W: 2, 0: Bad indentation. Found 1 spaces, expected 4 (bad-indentation)
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C: 1, 0: Missing module docstring (missing-docstring)
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C: 1, 0: Missing function docstring (missing-docstring)
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''')
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self._test_output([path, "--rcfile=%s" % config_path, "-rn"],
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expected_output=expected)
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def test_no_crash_with_formatting_regex_defaults(self):
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self._runtest(["--ignore-patterns=a"], reporter=TextReporter(six.StringIO()),
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code=32)
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def test_getdefaultencoding_crashes_with_lc_ctype_utf8(self):
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expected_output = textwrap.dedent('''
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************* Module application_crash
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E: 1, 6: Undefined variable 'something_undefined' (undefined-variable)
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''')
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module = join(HERE, 'regrtest_data', 'application_crash.py')
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with _configure_lc_ctype('UTF-8'):
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self._test_output([module, '-E'], expected_output=expected_output)
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