Add the reverse test to EnvironmentTest.

base/environment_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/environment.h"
 #include "base/scoped_ptr.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
 
 typedef PlatformTest EnvironmentTest;
 
 TEST_F(EnvironmentTest, GetVar) {
   // Every setup should have non-empty PATH...
   scoped_ptr<base::Environment> env(base::Environment::Create());
   std::string env_value;
   EXPECT_TRUE(env->GetVar("PATH", &env_value));
   EXPECT_NE(env_value, "");
 }
 
+TEST_F(EnvironmentTest, GetVarReverse) {
+  scoped_ptr<base::Environment> env(base::Environment::Create());
+  const char* kFooUpper = "FOO";
+  const char* kFooLower = "foo";
+
+  // Set a variable in UPPER case.
+  EXPECT_TRUE(env->SetVar(kFooUpper, kFooLower));
+
+  // And then try to get this variable passing the lower case.
+  std::string env_value;
+  EXPECT_TRUE(env->GetVar(kFooLower, &env_value));
+
+  EXPECT_STREQ(env_value.c_str(), kFooLower);
+
+  EXPECT_TRUE(env->UnSetVar(kFooUpper));
+
+  const char* kBar = "bar";
+  // Now do the opposite, set the variable in the lower case.
+  EXPECT_TRUE(env->SetVar(kFooLower, kBar));
+
+  // And then try to get this variable passing the UPPER case.
+  EXPECT_TRUE(env->GetVar(kFooUpper, &env_value));
+
+  EXPECT_STREQ(env_value.c_str(), kBar);
+
+  EXPECT_TRUE(env->UnSetVar(kFooLower));
+}
+
 TEST_F(EnvironmentTest, HasVar) {
   // Every setup should have PATH...
   scoped_ptr<base::Environment> env(base::Environment::Create());
   EXPECT_TRUE(env->HasVar("PATH"));
 }
 
 TEST_F(EnvironmentTest, SetVar) {
   scoped_ptr<base::Environment> env(base::Environment::Create());
 
   const char* kFooUpper = "FOO";
@@ skipping 18 matching lines @@
 
   // Now verify that the environment has the new variable.
   EXPECT_TRUE(env->HasVar(kFooUpper));
 
   // Finally verify that the environment variable was erased.
   EXPECT_TRUE(env->UnSetVar(kFooUpper));
 
   // And check that the variable has been unset.
   EXPECT_FALSE(env->HasVar(kFooUpper));
 }