1    :  // Copyright 2012 Google Inc. All Rights Reserved.
   2    :  //
   3    :  // Licensed under the Apache License, Version 2.0 (the "License");
   4    :  // you may not use this file except in compliance with the License.
   5    :  // You may obtain a copy of the License at
   6    :  //
   7    :  //     http://www.apache.org/licenses/LICENSE-2.0
   8    :  //
   9    :  // Unless required by applicable law or agreed to in writing, software
  10    :  // distributed under the License is distributed on an "AS IS" BASIS,
  11    :  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12    :  // See the License for the specific language governing permissions and
  13    :  // limitations under the License.
  14    :  //
  15    :  // Defines some unittest helper functions.
  16    :  
  17    :  #include "syzygy/common/unittest_util.h"
  18    :  #include "gtest/gtest.h"
  19    :  
  20    :  namespace testing {
  21    :  
  22  E :  TEST(CommonUnitTestUtil, ScopedLogLevelSaver) {
  23  E :    int old_level = logging::GetMinLogLevel();
  24  E :    int new_level = old_level - 1;
  25    :  
  26    :    {
  27  E :      ScopedLogLevelSaver log_level_saver;
  28  E :      logging::SetMinLogLevel(new_level);
  29  E :      ASSERT_EQ(new_level, logging::GetMinLogLevel());
  30  E :    }
  31    :  
  32  E :    ASSERT_EQ(old_level, logging::GetMinLogLevel());
  33  E :  }
  34    :  
  35    :  namespace {
  36    :  
  37  E :  void ScopedEnvironmentVariableTestImpl(bool is_variable_set) {
  38  E :    const char kVariableName[] = "ScopedEnvironmentVariableTestVarName";
  39  E :    const char kVariableValue[] = "initial";
  40  E :    const char kVariableOverrideValue[] = "override";
  41    :  
  42  E :    std::unique_ptr<base::Environment> env(base::Environment::Create());
  43    :  
  44    :    // Ensure the variable isn't set.
  45  E :    std::string initial_value;
  46  E :    ASSERT_FALSE(env->GetVar(kVariableName, &initial_value));
  47    :  
  48    :    // Set it if necessary.
  49  E :    if (is_variable_set)
  50  E :      ASSERT_TRUE(env->SetVar(kVariableName, kVariableValue));
  51    :  
  52    :    // Override the variable.
  53  E :    std::unique_ptr<ScopedEnvironmentVariable> override(
  54    :        new ScopedEnvironmentVariable(kVariableName, kVariableOverrideValue));
  55  E :    std::string retrieved_value;
  56  E :    ASSERT_TRUE(env->GetVar(kVariableName, &retrieved_value));
  57  E :    ASSERT_EQ(kVariableOverrideValue, retrieved_value);
  58    :  
  59    :    // Delete the override.
  60  E :    override.reset();
  61  E :    if (is_variable_set) {
  62  E :      ASSERT_TRUE(env->GetVar(kVariableName, &retrieved_value));
  63  E :      ASSERT_EQ(kVariableValue, retrieved_value);
  64  E :    } else {
  65  E :      ASSERT_FALSE(env->GetVar(kVariableName, &retrieved_value));
  66    :    }
  67  E :  }
  68    :  
  69    :  }  // namespace
  70    :  
  71  E :  TEST(CommonUnitTestUtil, ScopedEnvironmentVariableNotSetCase) {
  72  E :    ScopedEnvironmentVariableTestImpl(false);
  73  E :  }
  74    :  
  75  E :  TEST(CommonUnitTestUtil, ScopedEnvironmentVariableSetCase) {
  76  E :    ScopedEnvironmentVariableTestImpl(true);
  77  E :  }
  78    :  
  79    :  }  // namespace testing