Force COM machinery to notice that the path to the DelegateExecute verb handler has changed.

chrome/installer/util/callback_work_item_unittest.cc

+// Copyright (c) 2012 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/bind.h"
+#include "chrome/installer/util/callback_work_item.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace {
+
+// A callback that always fails (returns false).
+bool TestFailureCallback(const CallbackWorkItem& work_item) {
+  return false;
+}
+
+}  // namespace
+
+// Test that the work item returns false when a callback returns failure.
+TEST(CallbackWorkItemTest, TestFailure) {
+  CallbackWorkItem work_item(base::Bind(&TestFailureCallback));
+
+  EXPECT_FALSE(work_item.Do());
+}
+
+namespace {
+
+enum TestCallbackState {
+  TCS_UNDEFINED,
+  TCS_CALLED_FORWARD,
+  TCS_CALLED_ROLLBACK,
+};
+
+// A callback that sets |state| according to whether it is rolling forward or
+// backward.
+bool TestForwardBackwardCallback(TestCallbackState* state,
+                                 const CallbackWorkItem& work_item) {
+  *state = work_item.IsRollback() ? TCS_CALLED_ROLLBACK : TCS_CALLED_FORWARD;
+  return true;
+}
+
+}  // namespace
+
+// Test that the callback is invoked correclty during Do() and Rollback().
+TEST(CallbackWorkItemTest, TestForwardBackward) {
+  TestCallbackState state = TCS_UNDEFINED;
+
+  CallbackWorkItem work_item(base::Bind(&TestForwardBackwardCallback, &state));
+
+  EXPECT_TRUE(work_item.Do());
+  EXPECT_EQ(TCS_CALLED_FORWARD, state);
+
+  work_item.Rollback();
+  EXPECT_EQ(TCS_CALLED_ROLLBACK, state);
+}