Fixed channel switch when user decides to switch to another channel in

chrome/browser/ui/webui/help/version_updater_chromeos_unittest.cc

Index: chrome/browser/ui/webui/help/version_updater_chromeos_unittest.cc
diff --git a/chrome/browser/ui/webui/help/version_updater_chromeos_unittest.cc b/chrome/browser/ui/webui/help/version_updater_chromeos_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..d8e87aca3d32d1465b3fd803010b1ba6d10252a6
--- /dev/null
+++ b/chrome/browser/ui/webui/help/version_updater_chromeos_unittest.cc
@@ -0,0 +1,130 @@
+// Copyright 2014 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 "chrome/browser/ui/webui/help/version_updater_chromeos.h"
+
+#include "base/bind.h"
+#include "base/compiler_specific.h"
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "chrome/browser/chromeos/login/users/mock_user_manager.h"
+#include "chrome/browser/chromeos/login/users/scoped_user_manager_enabler.h"
+#include "chromeos/dbus/dbus_thread_manager.h"
+#include "chromeos/dbus/fake_update_engine_client.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+using ::testing::AtLeast;
+using ::testing::Return;
+
+namespace chromeos {
+
+namespace {
+
+void CheckNotification(VersionUpdater::Status /* status */,
+                       int /* progress */,
+                       const base::string16& /* message */) {
+}
+
+class VersionUpdaterCrosTestImpl : public VersionUpdaterCros {
+ public:
+  // VersionUpdaterCros overrides:
+  virtual bool EnsureCanUpdate(const StatusCallback& /* callback */) OVERRIDE {
+    return true;
+  }
+};
+
+}  // namespace
+
+class VersionUpdaterCrosTest : public ::testing::Test {
+ protected:
+  VersionUpdaterCrosTest()
+      : fake_update_engine_client_(NULL),
+        mock_user_manager_(new MockUserManager()),
+        user_manager_enabler_(mock_user_manager_) {}
+
+  virtual ~VersionUpdaterCrosTest() {}
+
+  virtual void SetUp() OVERRIDE {
+    fake_update_engine_client_ = new FakeUpdateEngineClient();
+    scoped_ptr<DBusThreadManagerSetter> dbus_setter =
+        DBusThreadManager::GetSetterForTesting();
+    dbus_setter->SetUpdateEngineClient(
+        scoped_ptr<UpdateEngineClient>(fake_update_engine_client_).Pass());
+
+    EXPECT_CALL(*mock_user_manager_, IsCurrentUserOwner())
+        .WillRepeatedly(Return(false));
+    EXPECT_CALL(*mock_user_manager_, Shutdown()).Times(AtLeast(0));
+  }
+
+  VersionUpdaterCrosTestImpl version_updater_;
+  FakeUpdateEngineClient* fake_update_engine_client_;  // Not owned.
+
+  MockUserManager* mock_user_manager_;  // Not owned.
+  ScopedUserManagerEnabler user_manager_enabler_;
+
+  DISALLOW_COPY_AND_ASSIGN(VersionUpdaterCrosTest);
+};
+
+// The test checks following behaviour:
+// 1. The device is currently on the dev channel and an user decides to switch
+// to the beta channel.
+// 2. In the middle of channel switch the user decides to switch to the stable
+// channel.
+// 3. Update engine reports an error because downloading channel (beta) is not
+// equal
+// to the target channel (stable).
+// 4. When update engine becomes idle downloading of the stable channel is
+// initiated.
+TEST_F(VersionUpdaterCrosTest, TwoOverlappingSetChannelRequests) {
+  version_updater_.SetChannel("beta-channel", true);
+
+  {
+    UpdateEngineClient::Status status;
+    status.status = UpdateEngineClient::UPDATE_STATUS_IDLE;
+    fake_update_engine_client_->set_default_status(status);
+    fake_update_engine_client_->NotifyObserversThatStatusChanged(status);
+  }
+
+  EXPECT_EQ(0, fake_update_engine_client_->request_update_check_call_count());
+
+  // IDLE -> DOWNLOADING transition after update check.
+  version_updater_.CheckForUpdate(base::Bind(&CheckNotification));
+  EXPECT_EQ(1, fake_update_engine_client_->request_update_check_call_count());
+
+  {
+    UpdateEngineClient::Status status;
+    status.status = UpdateEngineClient::UPDATE_STATUS_DOWNLOADING;
+    status.download_progress = 0.1;
+    fake_update_engine_client_->set_default_status(status);
+    fake_update_engine_client_->NotifyObserversThatStatusChanged(status);
+  }
+
+  version_updater_.SetChannel("stable-channel", true);
+
+  // DOWNLOADING -> REPORTING_ERROR_EVENT transition since target channel is not
+  // equal to downloading channel now.
+  {
+    UpdateEngineClient::Status status;
+    status.status = UpdateEngineClient::UPDATE_STATUS_REPORTING_ERROR_EVENT;
+    fake_update_engine_client_->set_default_status(status);
+    fake_update_engine_client_->NotifyObserversThatStatusChanged(status);
+  }
+
+  version_updater_.CheckForUpdate(base::Bind(&CheckNotification));
+  EXPECT_EQ(1, fake_update_engine_client_->request_update_check_call_count());
+
+  // REPORTING_ERROR_EVENT -> IDLE transition, update check should be
+  // automatically scheduled.
+  {
+    UpdateEngineClient::Status status;
+    status.status = UpdateEngineClient::UPDATE_STATUS_IDLE;
+    fake_update_engine_client_->set_default_status(status);
+    fake_update_engine_client_->NotifyObserversThatStatusChanged(status);
+  }
+
+  EXPECT_EQ(2, fake_update_engine_client_->request_update_check_call_count());
+}
+
+}  // namespace chromeos