Unpack extensions inside chrome's directory.

base/scoped_temp_dir_unittest.cc

 // Copyright (c) 2009 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/file_util.h"
 #include "base/scoped_temp_dir.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 TEST(ScopedTempDir, FullPath) {
   FilePath test_path;
@@ skipping 37 matching lines @@
     ScopedTempDir dir;
     EXPECT_TRUE(dir.CreateUniqueTempDir());
     test_path = dir.path();
     EXPECT_TRUE(file_util::DirectoryExists(test_path));
     FilePath tmp_dir;
     EXPECT_TRUE(file_util::GetTempDir(&tmp_dir));
     EXPECT_TRUE(test_path.value().find(tmp_dir.value()) != std::string::npos);
   }
   EXPECT_FALSE(file_util::DirectoryExists(test_path));
 }
+
+TEST(ScopedTempDir, UniqueTempDirUnderPath) {
+  // Create a path which will contain a unique temp path.
+  FilePath base_path;
+  file_util::CreateNewTempDirectory(FILE_PATH_LITERAL("base_dir"),
+                                    &base_path);
+
+  FilePath test_path;
+  {
+    ScopedTempDir dir;
+    EXPECT_TRUE(dir.CreateUniqueTempDirUnderPath(base_path));
+    test_path = dir.path();
+    EXPECT_TRUE(file_util::DirectoryExists(test_path));
+    EXPECT_TRUE(base_path.IsParent(test_path));
+    EXPECT_TRUE(test_path.value().find(base_path.value()) != std::string::npos);
+  }
+  EXPECT_FALSE(file_util::DirectoryExists(test_path));
+}