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Testing Color Output Configuration in DrKLO/Telegram Google Test Implementation

This test suite validates Google Test’s color output functionality, ensuring proper color determination based on terminal type, environment variables, and command line flags. The tests verify the interaction between GTEST_COLOR environment variable and –gtest_color flag across different terminal environments.

Test Coverage Overview

The test suite provides comprehensive coverage of Google Test’s color output determination logic.

Key areas tested include:

Default color behavior with no environment variables or flags
Color handling with –gtest_color flag only
Color handling with GTEST_COLOR environment variable only
Combined behavior of environment variables and command line flags
Support for various terminal types (xterm, linux, cygwin, etc.)

Implementation Analysis

The testing approach utilizes Python’s unittest framework with systematic test cases for color output scenarios. The implementation employs helper functions for environment variable manipulation and process execution, following a clear pattern of setting up test conditions and verifying color output behavior.

Framework features utilized include:

TestCase inheritance for test organization
Custom assertions for boolean conditions
Test utilities for process management
Cross-platform compatibility handling

Technical Details

Testing tools and configuration:

Python unittest framework for test structure
Custom gtest_test_utils for test execution
Environment variable manipulation for test setup
Subprocess handling for command execution
Platform-specific condition handling (Windows vs non-Windows)

Best Practices Demonstrated

The test suite exemplifies several testing best practices for system integration testing.

Notable practices include:

Isolation of test environment through controlled environment variables
Comprehensive test cases covering all combination scenarios
Clear test method naming reflecting test purpose
Modular helper functions for common operations
Platform-specific condition handling

drklo/telegram

TMessagesProj/jni/boringssl/third_party/googletest/test/googletest-color-test.py

            
#!/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.

"""Verifies that Google Test correctly determines whether to use colors."""

import os
import gtest_test_utils

IS_WINDOWS = os.name == 'nt'

COLOR_ENV_VAR = 'GTEST_COLOR'
COLOR_FLAG = 'gtest_color'
COMMAND = gtest_test_utils.GetTestExecutablePath('googletest-color-test_')


def SetEnvVar(env_var, value):
  """Sets the env variable to 'value'; unsets it when 'value' is None."""

  if value is not None:
    os.environ[env_var] = value
  elif env_var in os.environ:
    del os.environ[env_var]


def UsesColor(term, color_env_var, color_flag):
  """Runs googletest-color-test_ and returns its exit code."""

  SetEnvVar('TERM', term)
  SetEnvVar(COLOR_ENV_VAR, color_env_var)

  if color_flag is None:
    args = []
  else:
    args = ['--%s=%s' % (COLOR_FLAG, color_flag)]
  p = gtest_test_utils.Subprocess([COMMAND] + args)
  return not p.exited or p.exit_code


class GTestColorTest(gtest_test_utils.TestCase):
  def testNoEnvVarNoFlag(self):
    """Tests the case when there's neither GTEST_COLOR nor --gtest_color."""

    if not IS_WINDOWS:
      self.assert_(not UsesColor('dumb', None, None))
      self.assert_(not UsesColor('emacs', None, None))
      self.assert_(not UsesColor('xterm-mono', None, None))
      self.assert_(not UsesColor('unknown', None, None))
      self.assert_(not UsesColor(None, None, None))
    self.assert_(UsesColor('linux', None, None))
    self.assert_(UsesColor('cygwin', None, None))
    self.assert_(UsesColor('xterm', None, None))
    self.assert_(UsesColor('xterm-color', None, None))
    self.assert_(UsesColor('xterm-256color', None, None))

  def testFlagOnly(self):
    """Tests the case when there's --gtest_color but not GTEST_COLOR."""

    self.assert_(not UsesColor('dumb', None, 'no'))
    self.assert_(not UsesColor('xterm-color', None, 'no'))
    if not IS_WINDOWS:
      self.assert_(not UsesColor('emacs', None, 'auto'))
    self.assert_(UsesColor('xterm', None, 'auto'))
    self.assert_(UsesColor('dumb', None, 'yes'))
    self.assert_(UsesColor('xterm', None, 'yes'))

  def testEnvVarOnly(self):
    """Tests the case when there's GTEST_COLOR but not --gtest_color."""

    self.assert_(not UsesColor('dumb', 'no', None))
    self.assert_(not UsesColor('xterm-color', 'no', None))
    if not IS_WINDOWS:
      self.assert_(not UsesColor('dumb', 'auto', None))
    self.assert_(UsesColor('xterm-color', 'auto', None))
    self.assert_(UsesColor('dumb', 'yes', None))
    self.assert_(UsesColor('xterm-color', 'yes', None))

  def testEnvVarAndFlag(self):
    """Tests the case when there are both GTEST_COLOR and --gtest_color."""

    self.assert_(not UsesColor('xterm-color', 'no', 'no'))
    self.assert_(UsesColor('dumb', 'no', 'yes'))
    self.assert_(UsesColor('xterm-color', 'no', 'auto'))

  def testAliasesOfYesAndNo(self):
    """Tests using aliases in specifying --gtest_color."""

    self.assert_(UsesColor('dumb', None, 'true'))
    self.assert_(UsesColor('dumb', None, 'YES'))
    self.assert_(UsesColor('dumb', None, 'T'))
    self.assert_(UsesColor('dumb', None, '1'))

    self.assert_(not UsesColor('xterm', None, 'f'))
    self.assert_(not UsesColor('xterm', None, 'false'))
    self.assert_(not UsesColor('xterm', None, '0'))
    self.assert_(not UsesColor('xterm', None, 'unknown'))


if __name__ == '__main__':
  gtest_test_utils.Main()