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#!/usr/bin/env python
#
# Copyright 2008, Google Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
"""Tests the text output of Google C++ Testing Framework.
SYNOPSIS
gtest_output_test.py --build_dir=BUILD/DIR --gengolden
# where BUILD/DIR contains the built gtest_output_test_ file.
gtest_output_test.py --gengolden
gtest_output_test.py
"""
__author__ = 'wan@google.com (Zhanyong Wan)'
import os
import re
import sys
import gtest_test_utils
# The flag for generating the golden file
GENGOLDEN_FLAG = '--gengolden'
CATCH_EXCEPTIONS_ENV_VAR_NAME = 'GTEST_CATCH_EXCEPTIONS'
IS_WINDOWS = os.name == 'nt'
# TODO(vladl@google.com): remove the _lin suffix.
GOLDEN_NAME = 'gtest_output_test_golden_lin.txt'
PROGRAM_PATH = gtest_test_utils.GetTestExecutablePath('gtest_output_test_')
# At least one command we exercise must not have the
# --gtest_internal_skip_environment_and_ad_hoc_tests flag.
COMMAND_LIST_TESTS = ({}, [PROGRAM_PATH, '--gtest_list_tests'])
COMMAND_WITH_COLOR = ({}, [PROGRAM_PATH, '--gtest_color=yes'])
COMMAND_WITH_TIME = ({}, [PROGRAM_PATH,
'--gtest_print_time',
'--gtest_internal_skip_environment_and_ad_hoc_tests',
'--gtest_filter=FatalFailureTest.*:LoggingTest.*'])
COMMAND_WITH_DISABLED = (
{}, [PROGRAM_PATH,
'--gtest_also_run_disabled_tests',
'--gtest_internal_skip_environment_and_ad_hoc_tests',
'--gtest_filter=*DISABLED_*'])
COMMAND_WITH_SHARDING = (
{'GTEST_SHARD_INDEX': '1', 'GTEST_TOTAL_SHARDS': '2'},
[PROGRAM_PATH,
'--gtest_internal_skip_environment_and_ad_hoc_tests',
'--gtest_filter=PassingTest.*'])
GOLDEN_PATH = os.path.join(gtest_test_utils.GetSourceDir(), GOLDEN_NAME)
def ToUnixLineEnding(s):
"""Changes all Windows/Mac line endings in s to UNIX line endings."""
return s.replace('\r\n', '\n').replace('\r', '\n')
def RemoveLocations(test_output):
"""Removes all file location info from a Google Test program's output.
Args:
test_output: the output of a Google Test program.
Returns:
output with all file location info (in the form of
'DIRECTORY/FILE_NAME:LINE_NUMBER: 'or
'DIRECTORY\\FILE_NAME(LINE_NUMBER): ') replaced by
'FILE_NAME:#: '.
"""
return re.sub(r'.*[/\\](.+)(\:\d+|\(\d+\))\: ', r'\1:#: ', test_output)
def RemoveStackTraceDetails(output):
"""Removes all stack traces from a Google Test program's output."""
# *? means "find the shortest string that matches".
return re.sub(r'Stack trace:(.|\n)*?\n\n',
'Stack trace: (omitted)\n\n', output)
def RemoveStackTraces(output):
"""Removes all traces of stack traces from a Google Test program's output."""
# *? means "find the shortest string that matches".
return re.sub(r'Stack trace:(.|\n)*?\n\n', '', output)
def RemoveTime(output):
"""Removes all time information from a Google Test program's output."""
return re.sub(r'\(\d+ ms', '(? ms', output)
def RemoveTypeInfoDetails(test_output):
"""Removes compiler-specific type info from Google Test program's output.
Args:
test_output: the output of a Google Test program.
Returns:
output with type information normalized to canonical form.
"""
# some compilers output the name of type 'unsigned int' as 'unsigned'
return re.sub(r'unsigned int', 'unsigned', test_output)
def NormalizeToCurrentPlatform(test_output):
"""Normalizes platform specific output details for easier comparison."""
if IS_WINDOWS:
# Removes the color information that is not present on Windows.
test_output = re.sub('\x1b\\[(0;3\d)?m', '', test_output)
# Changes failure message headers into the Windows format.
test_output = re.sub(r': Failure\n', r': error: ', test_output)
# Changes file(line_number) to file:line_number.
test_output = re.sub(r'((\w|\.)+)\((\d+)\):', r'\1:\3:', test_output)
return test_output
def RemoveTestCounts(output):
"""Removes test counts from a Google Test program's output."""
output = re.sub(r'\d+ tests?, listed below',
'? tests, listed below', output)
output = re.sub(r'\d+ FAILED TESTS',
'? FAILED TESTS', output)
output = re.sub(r'\d+ tests? from \d+ test cases?',
'? tests from ? test cases', output)
output = re.sub(r'\d+ tests? from ([a-zA-Z_])',
r'? tests from \1', output)
return re.sub(r'\d+ tests?\.', '? tests.', output)
def RemoveMatchingTests(test_output, pattern):
"""Removes output of specified tests from a Google Test program's output.
This function strips not only the beginning and the end of a test but also
all output in between.
Args:
test_output: A string containing the test output.
pattern: A regex string that matches names of test cases or
tests to remove.
Returns:
Contents of test_output with tests whose names match pattern removed.
"""
test_output = re.sub(
r'.*\[ RUN \] .*%s(.|\n)*?\[( FAILED | OK )\] .*%s.*\n' % (
pattern, pattern),
'',
test_output)
return re.sub(r'.*%s.*\n' % pattern, '', test_output)
def NormalizeOutput(output):
"""Normalizes output (the output of gtest_output_test_.exe)."""
output = ToUnixLineEnding(output)
output = RemoveLocations(output)
output = RemoveStackTraceDetails(output)
output = RemoveTime(output)
return output
def GetShellCommandOutput(env_cmd):
"""Runs a command in a sub-process, and returns its output in a string.
Args:
env_cmd: The shell command. A 2-tuple where element 0 is a dict of extra
environment variables to set, and element 1 is a string with
the command and any flags.
Returns:
A string with the command's combined standard and diagnostic output.
"""
# Spawns cmd in a sub-process, and gets its standard I/O file objects.
# Set and save the environment properly.
environ = os.environ.copy()
environ.update(env_cmd[0])
p = gtest_test_utils.Subprocess(env_cmd[1], env=environ)
return p.output
def GetCommandOutput(env_cmd):
"""Runs a command and returns its output with all file location
info stripped off.
Args:
env_cmd: The shell command. A 2-tuple where element 0 is a dict of extra
environment variables to set, and element 1 is a string with
the command and any flags.
"""
# Disables exception pop-ups on Windows.
environ, cmdline = env_cmd
environ = dict(environ) # Ensures we are modifying a copy.
environ[CATCH_EXCEPTIONS_ENV_VAR_NAME] = '1'
return NormalizeOutput(GetShellCommandOutput((environ, cmdline)))
def GetOutputOfAllCommands():
"""Returns concatenated output from several representative commands."""
return (GetCommandOutput(COMMAND_WITH_COLOR) +
GetCommandOutput(COMMAND_WITH_TIME) +
GetCommandOutput(COMMAND_WITH_DISABLED) +
GetCommandOutput(COMMAND_WITH_SHARDING))
test_list = GetShellCommandOutput(COMMAND_LIST_TESTS)
SUPPORTS_DEATH_TESTS = 'DeathTest' in test_list
SUPPORTS_TYPED_TESTS = 'TypedTest' in test_list
SUPPORTS_THREADS = 'ExpectFailureWithThreadsTest' in test_list
SUPPORTS_STACK_TRACES = False
CAN_GENERATE_GOLDEN_FILE = (SUPPORTS_DEATH_TESTS and
SUPPORTS_TYPED_TESTS and
SUPPORTS_THREADS)
class GTestOutputTest(gtest_test_utils.TestCase):
def RemoveUnsupportedTests(self, test_output):
if not SUPPORTS_DEATH_TESTS:
test_output = RemoveMatchingTests(test_output, 'DeathTest')
if not SUPPORTS_TYPED_TESTS:
test_output = RemoveMatchingTests(test_output, 'TypedTest')
test_output = RemoveMatchingTests(test_output, 'TypedDeathTest')
test_output = RemoveMatchingTests(test_output, 'TypeParamDeathTest')
if not SUPPORTS_THREADS:
test_output = RemoveMatchingTests(test_output,
'ExpectFailureWithThreadsTest')
test_output = RemoveMatchingTests(test_output,
'ScopedFakeTestPartResultReporterTest')
test_output = RemoveMatchingTests(test_output,
'WorksConcurrently')
if not SUPPORTS_STACK_TRACES:
test_output = RemoveStackTraces(test_output)
return test_output
def testOutput(self):
output = GetOutputOfAllCommands()
golden_file = open(GOLDEN_PATH, 'rb')
# A mis-configured source control system can cause \r appear in EOL
# sequences when we read the golden file irrespective of an operating
# system used. Therefore, we need to strip those \r's from newlines
# unconditionally.
golden = ToUnixLineEnding(golden_file.read())
golden_file.close()
# We want the test to pass regardless of certain features being
# supported or not.
# We still have to remove type name specifics in all cases.
normalized_actual = RemoveTypeInfoDetails(output)
normalized_golden = RemoveTypeInfoDetails(golden)
if CAN_GENERATE_GOLDEN_FILE:
self.assertEqual(normalized_golden, normalized_actual)
else:
normalized_actual = NormalizeToCurrentPlatform(
RemoveTestCounts(normalized_actual))
normalized_golden = NormalizeToCurrentPlatform(
RemoveTestCounts(self.RemoveUnsupportedTests(normalized_golden)))
# This code is very handy when debugging golden file differences:
if os.getenv('DEBUG_GTEST_OUTPUT_TEST'):
open(os.path.join(
gtest_test_utils.GetSourceDir(),
'_gtest_output_test_normalized_actual.txt'), 'wb').write(
normalized_actual)
open(os.path.join(
gtest_test_utils.GetSourceDir(),
'_gtest_output_test_normalized_golden.txt'), 'wb').write(
normalized_golden)
self.assertEqual(normalized_golden, normalized_actual)
if __name__ == '__main__':
if sys.argv[1:] == [GENGOLDEN_FLAG]:
if CAN_GENERATE_GOLDEN_FILE:
output = GetOutputOfAllCommands()
golden_file = open(GOLDEN_PATH, 'wb')
golden_file.write(output)
golden_file.close()
else:
message = (
"""Unable to write a golden file when compiled in an environment
that does not support all the required features (death tests, typed tests,
and multiple threads). Please generate the golden file using a binary built
with those features enabled.""")
sys.stderr.write(message)
sys.exit(1)
else:
gtest_test_utils.Main()
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