dbus::ObjectManager: Add a match rule for properties before GetManagedObjects.

dbus/object_manager_unittest.cc

Index: dbus/object_manager_unittest.cc
diff --git a/dbus/object_manager_unittest.cc b/dbus/object_manager_unittest.cc
index 3e53095b12e4fefd7add9d87d6b31caec4b8848a..3c19fd83edd48905574bec785ea85c997f584564 100644
--- a/dbus/object_manager_unittest.cc
+++ b/dbus/object_manager_unittest.cc
@@ -27,7 +27,7 @@ class ObjectManagerTest
     : public testing::Test,
       public ObjectManager::Interface {
  public:
-  ObjectManagerTest() {
+  ObjectManagerTest() : timeout_expired_(false) {
   }
 
   struct Properties : public PropertySet {
@@ -112,6 +112,21 @@ class ObjectManagerTest
     message_loop_.Quit();
   }
 
+  // Called when an object manager has been removed from the bus.
+  void OnObjectManagerRemoved() {
+    message_loop_.Quit();
+  }
+
+  // Called from the PropertiesChangedAsObjectsReceived test case. The test will
+  // not run the message loop if it receives the expected PropertiesChanged
+  // signal before the timeout. This method immediately fails the test.
+  void PropertiesChangedTestTimeout() {
+    timeout_expired_ = true;
+    message_loop_.Quit();
+
+    FAIL() << "Never received PropertiesChanged";
+  }
+
  protected:
   // Called when an object is added.
   virtual void ObjectAdded(const ObjectPath& object_path,
@@ -130,6 +145,16 @@ class ObjectManagerTest
   // Called when a property value is updated.
   void OnPropertyChanged(const ObjectPath& object_path,
                          const std::string& name) {
+    // Store the value of the "Name" property if that's the one that
+    // changed.
+    Properties* properties = static_cast<Properties*>(
+        object_manager_->GetProperties(
+            object_path,
+            "org.chromium.TestInterface"));
+    if (name == properties->name.name())
+      last_name_value_ = properties->name.value();
+
+    // Store the updated property.
     updated_properties_.push_back(name);
     message_loop_.Quit();
   }
@@ -182,6 +207,9 @@ class ObjectManagerTest
   ObjectManager* object_manager_;
   scoped_ptr<TestService> test_service_;
 
+  std::string last_name_value_;
+  bool timeout_expired_;
+
   std::vector<std::pair<ObjectPath, std::string> > added_objects_;
   std::vector<std::pair<ObjectPath, std::string> > removed_objects_;
   std::vector<std::string> updated_properties_;
@@ -350,4 +378,36 @@ TEST_F(ObjectManagerTest, OwnershipLostAndRegained) {
   ASSERT_EQ(1U, object_paths.size());
 }
 
+TEST_F(ObjectManagerTest, PropertiesChangedAsObjectsReceived) {
+  // Remove the existing object manager.
+  object_manager_->UnregisterInterface("org.chromium.TestInterface");
+  EXPECT_TRUE(bus_->RemoveObjectManager(
+      "org.chromium.TestService",
+      ObjectPath("/org/chromium/TestService"),
+      base::Bind(&ObjectManagerTest::OnObjectManagerRemoved,
+                 base::Unretained(this))));
+  message_loop_.Run();
+
+  PerformAction("SetSendImmediatePropertiesChanged",
+                ObjectPath("/org/chromium/TestService"));
+
+  object_manager_ = bus_->GetObjectManager(
+      "org.chromium.TestService",
+      ObjectPath("/org/chromium/TestService"));
+  object_manager_->RegisterInterface("org.chromium.TestInterface", this);
+
+  // The newly created object manager should call GetManagedObjects immediately
+  // after setting up the match rule for PropertiesChanged. We should process
+  // the PropertiesChanged event right after that. If we don't receive it within
+  // 2 seconds, then fail the test.
+  message_loop_.PostDelayedTask(
+      FROM_HERE,
+      base::Bind(&ObjectManagerTest::PropertiesChangedTestTimeout,
+                 base::Unretained(this)),
+      base::TimeDelta::FromSeconds(2));
+
+  while (last_name_value_ != "ChangedTestServiceName" && !timeout_expired_)
+    message_loop_.Run();
+}
+
 }  // namespace dbus