Decouple bluetooth_event_router from extension_system.

chrome/browser/extensions/api/bluetooth/bluetooth_event_router_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 "chrome/browser/extensions/api/bluetooth/bluetooth_event_router.h"
+#include "chrome/test/base/testing_profile.h"
+#include "device/bluetooth/test/mock_bluetooth_adapter.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace {
+
+const char* kAdapterAddress = "Mock Adapter address for testing";
+const char* kName = "Mock Adapter name for testing";
+
+}  // namespace
+
+namespace extensions {
+
+class ExtensionBluetoothEventRouterTest : public testing::Test {
+ public:
+  ExtensionBluetoothEventRouterTest()
+      : mock_adapter_(new testing::StrictMock<device::MockBluetoothAdapter>(
+            kAdapterAddress, kName)),
+        router_(&test_profile_) {
+    router_.SetAdapterForTest(mock_adapter_);
+  }
+
+ protected:
+  testing::StrictMock<device::MockBluetoothAdapter>* mock_adapter_;
+  TestingProfile test_profile_;
+  ExtensionBluetoothEventRouter router_;
+};
+
+TEST_F(ExtensionBluetoothEventRouterTest, BluetoothEventListener) {
+  router_.OnListenerAdded();
+  EXPECT_CALL(*mock_adapter_, RemoveObserver(testing::_)).Times(1);
+  router_.OnListenerRemoved();
+}
+
+TEST_F(ExtensionBluetoothEventRouterTest, MultipleBluetoothEventListeners) {
+  router_.OnListenerAdded();
+  router_.OnListenerAdded();
+  router_.OnListenerAdded();
+  router_.OnListenerRemoved();
+  router_.OnListenerRemoved();
+  EXPECT_CALL(*mock_adapter_, RemoveObserver(testing::_)).Times(1);
+  router_.OnListenerRemoved();
+}
+
+}  // namespace extensions