base/env_var_unittest.cc

// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "base/env_var.h"
#include "base/scoped_ptr.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "testing/platform_test.h"

typedef PlatformTest EnvVarTest;

TEST_F(EnvVarTest, GetEnvVar) {
  // Every setup should have non-empty PATH...
  scoped_ptr<base::EnvVarGetter> env(base::EnvVarGetter::Create());
  std::string env_value;
  EXPECT_TRUE(env->GetEnv("PATH", &env_value));
  EXPECT_NE(env_value, "");
}

TEST_F(EnvVarTest, HasEnvVar) {
  // Every setup should have PATH...
  scoped_ptr<base::EnvVarGetter> env(base::EnvVarGetter::Create());
  EXPECT_TRUE(env->HasEnv("PATH"));
}

TEST_F(EnvVarTest, SetEnvVar) {
  scoped_ptr<base::EnvVarGetter> env(base::EnvVarGetter::Create());

  const char kFooUpper[] = "FOO";
  const char kFooLower[] = "foo";
  EXPECT_TRUE(env->SetEnv(kFooUpper, kFooLower));

  // Now verify that the environment has the new variable.
  EXPECT_TRUE(env->HasEnv(kFooUpper));

  std::string var_value;
  EXPECT_TRUE(env->GetEnv(kFooUpper, &var_value));
  EXPECT_EQ(var_value, kFooLower);
}

TEST_F(EnvVarTest, UnSetEnvVar) {
  scoped_ptr<base::EnvVarGetter> env(base::EnvVarGetter::Create());

  const char kFooUpper[] = "FOO";
  const char kFooLower[] = "foo";
  // First set some environment variable.
  EXPECT_TRUE(env->SetEnv(kFooUpper, kFooLower));

  // Now verify that the environment has the new variable.
  EXPECT_TRUE(env->HasEnv(kFooUpper));

  // Finally verify that the environment variable was erased.
  EXPECT_TRUE(env->UnSetEnv(kFooUpper));

  // And check that the variable has been unset.
  EXPECT_FALSE(env->HasEnv(kFooUpper));
}