Send WM_DEVICECHANGE message through SystemMonitor

base/system_monitor/system_monitor_unittest.cc

 // Copyright (c) 2011 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/system_monitor/system_monitor.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace base {
 
 class PowerTest : public SystemMonitor::PowerObserver {
@@ skipping 72 matching lines @@
   system_monitor.ProcessPowerMessage(SystemMonitor::RESUME_EVENT);
   loop.RunAllPending();
   EXPECT_EQ(test[0].resumes(), 1);
 
   // Send a duplicate resume notification.  This should be suppressed.
   system_monitor.ProcessPowerMessage(SystemMonitor::RESUME_EVENT);
   loop.RunAllPending();
   EXPECT_EQ(test[0].resumes(), 1);
 }
 
+class DeviceChangeTest : public SystemMonitor::DeviceChangeObserver {
+ public:
+  DeviceChangeTest()
+      : changes_(0) {
+  }
+
+  // DeviceChangeObserver callbacks.
+  void OnDeviceChange() {

[sky, 2011/11/11 02:32:59]

virtual and OVERRIDE

[scottmg, 2011/11/11 05:06:09]

Done.

+    changes_++;
+  }
+
+  // Test status counts.
+  int changes() { return changes_; }

[sky, 2011/11/11 02:32:59]

const

[scottmg, 2011/11/11 05:06:09]

Done.

+
+ private:
+  int changes_;  // Count of OnDeviceChange notifications.

[sky, 2011/11/11 02:32:59]

DISALLOW_...

[scottmg, 2011/11/11 05:06:09]

Done.

+};
+
+TEST(SystemMonitor, DeviceChangeNotifications) {
+  const int kObservers = 5;
+
+  // Initialize a message loop for this to run on.
+  MessageLoop loop;
+
+#if defined(OS_MACOSX)
+  SystemMonitor::AllocateSystemIOPorts();
+#endif
+
+  SystemMonitor system_monitor;
+  DeviceChangeTest test[kObservers];
+  for (int index = 0; index < kObservers; ++index)
+    system_monitor.AddObserver(&test[index]);
+
+  system_monitor.ProcessDeviceChange();
+  loop.RunAllPending();
+  EXPECT_EQ(test[0].changes(), 1);

[sky, 2011/11/11 02:32:59]

assertions should have expected first, then actual.

[scottmg, 2011/11/11 05:06:09]

Done.

+
+  system_monitor.ProcessDeviceChange();
+  system_monitor.ProcessDeviceChange();
+  loop.RunAllPending();
+  EXPECT_EQ(test[0].changes(), 3);
+}
+
 }  // namespace base