Add infrastructure enabling tests of installer upgrade scenarios....

chrome/installer/test/upgrade_test.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/file_path.h"
+#include "base/file_util.h"
+#include "chrome/installer/test/alternate_version_generator.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace {
+  const wchar_t kMiniInstallerExe[] = L"mini_installer.exe";
+}  // namespace
+
+// Boilerplate for a future upgrade scenario test.
+class UpgradeTest : public testing::Test {
+ public:
+  // Generate a newer version of mini_installer.exe.
+  static void SetUpTestCase() {
+    ASSERT_TRUE(file_util::CreateTemporaryFile(&next_mini_installer_path_));
+    ASSERT_TRUE(
+        upgrade_test::GenerateNextVersion(FilePath(&kMiniInstallerExe[0]),
+                                          next_mini_installer_path_));
+  }
+
+  // Clean up by deleting the created newer version of mini_installer.exe.
+  static void TearDownTestCase() {
+    EXPECT_TRUE(file_util::Delete(next_mini_installer_path_, false));
+  }
+ private:
+  static FilePath next_mini_installer_path_;
+};  // class UpgradeTest
+
+FilePath UpgradeTest::next_mini_installer_path_;
+
+TEST_F(UpgradeTest, DoNothing) {
+}