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

dbus/object_manager_unittest.cc

 // Copyright (c) 2013 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 "dbus/object_manager.h"
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "base/threading/thread.h"
 #include "base/threading/thread_restrictions.h"
 #include "dbus/bus.h"
 #include "dbus/object_path.h"
 #include "dbus/object_proxy.h"
 #include "dbus/property.h"
 #include "dbus/test_service.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace dbus {
 
 // The object manager test exercises the asynchronous APIs in ObjectManager,
 // and by extension PropertySet and Property<>.
 class ObjectManagerTest
     : public testing::Test,
       public ObjectManager::Interface {
  public:
-  ObjectManagerTest() {
+  ObjectManagerTest() : timeout_expired_(false) {
   }
 
   struct Properties : public PropertySet {
     Property<std::string> name;
     Property<int16> version;
     Property<std::vector<std::string> > methods;
     Property<std::vector<ObjectPath> > objects;
 
     Properties(ObjectProxy* object_proxy,
                const std::string& interface_name,
@@ skipping 64 matching lines @@
     // Stopping a thread is considered an IO operation, so do this after
     // allowing IO.
     test_service_->Stop();
   }
 
   void MethodCallback(Response* response) {
     method_callback_called_ = true;
     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,
                            const std::string& interface_name) OVERRIDE {
     added_objects_.push_back(std::make_pair(object_path, interface_name));
     message_loop_.Quit();
   }
 
   // Called when an object is removed.
   virtual void ObjectRemoved(const ObjectPath& object_path,
                              const std::string& interface_name) OVERRIDE {
     removed_objects_.push_back(std::make_pair(object_path, interface_name));
     message_loop_.Quit();
   }
 
   // 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();
   }
 
   static const size_t kExpectedObjects = 1;
   static const size_t kExpectedProperties = 4;
 
   void WaitForObject() {
     while (added_objects_.size() < kExpectedObjects ||
            updated_properties_.size() < kExpectedProperties)
@@ skipping 32 matching lines @@
                                         base::Unretained(this)));
     WaitForMethodCallback();
   }
 
   base::MessageLoop message_loop_;
   scoped_ptr<base::Thread> dbus_thread_;
   scoped_refptr<Bus> bus_;
   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_;
 
   bool method_callback_called_;
 };
 
 
 TEST_F(ObjectManagerTest, InitialObject) {
   ObjectProxy* object_proxy = object_manager_->GetObjectProxy(
@@ skipping 148 matching lines @@
 
 TEST_F(ObjectManagerTest, OwnershipLostAndRegained) {
   PerformAction("Ownership", ObjectPath("/org/chromium/TestService"));
   WaitForRemoveObject();
   WaitForObject();
 
   std::vector<ObjectPath> object_paths = object_manager_->GetObjects();
   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