Add tests for ash devtools window updates

ash/common/devtools/ash_devtools_unittest.cc

Index: ash/common/devtools/ash_devtools_unittest.cc
diff --git a/ash/common/devtools/ash_devtools_unittest.cc b/ash/common/devtools/ash_devtools_unittest.cc
index 4bdcb034d756fc6d0cd081d6054616e722f78b93..c67c83128606c99009378e6b39c8abffa5aa6787 100644
--- a/ash/common/devtools/ash_devtools_unittest.cc
+++ b/ash/common/devtools/ash_devtools_unittest.cc
@@ -27,6 +27,38 @@ class TestView : public views::View {
   DISALLOW_COPY_AND_ASSIGN(TestView);
 };
 
+class FakeFrontendChannel : public FrontendChannel {
+ public:
+  FakeFrontendChannel() {}
+  ~FakeFrontendChannel() override {}
+
+  int CountProtocolNotificationMessageStartsWith(const std::string& message) {
+    int count = 0;
+    for (const std::string& s : protocol_notification_messages_) {
+      if (base::StartsWith(s, message, base::CompareCase::SENSITIVE))
+        count++;
+    }
+    return count;
+  }
+
+  int CountProtocolNotificationMessage(const std::string& message) {
+    return std::count(protocol_notification_messages_.begin(),
+                      protocol_notification_messages_.end(), message);
+  }
+
+  // FrontendChannel
+  void sendProtocolResponse(int callId, const std::string& message) override {}
+  void flushProtocolNotifications() override {}
+  void sendProtocolNotification(const std::string& message) override {
+    protocol_notification_messages_.push_back(message);
+  }
+
+ private:
+  std::vector<std::string> protocol_notification_messages_;
+
+  DISALLOW_COPY_AND_ASSIGN(FakeFrontendChannel);
+};
+
 std::string GetAttributeValue(const std::string& attribute, DOM::Node* node) {
   EXPECT_TRUE(node->hasAttributes());
   Array<std::string>* attributes = node->getAttributes(nullptr);
@@ -99,18 +131,46 @@ class AshDevToolsTest : public AshTest {
 
   void SetUp() override {
     AshTest::SetUp();
+    fake_frontend_channel_ = base::MakeUnique<FakeFrontendChannel>();
+    uber_dispatcher_ =
+        base::MakeUnique<UberDispatcher>(fake_frontend_channel_.get());
     dom_agent_ =
         base::MakeUnique<devtools::AshDevToolsDOMAgent>(WmShell::Get());
+    dom_agent_->Init(uber_dispatcher_.get());
   }
 
   void TearDown() override {
     dom_agent_.reset();
+    uber_dispatcher_.reset();
+    fake_frontend_channel_.reset();
     AshTest::TearDown();
   }
 
+  void ExpectChildNodeInserted(int parent_id, int prev_sibling_id) {
+    EXPECT_EQ(1, frontend_channel()->CountProtocolNotificationMessageStartsWith(
+                     base::StringPrintf("{\"method\":\"DOM.childNodeInserted\","
+                                        "\"params\":{\"parentNodeId\":%d,"
+                                        "\"previousNodeId\":%d",
+                                        parent_id, prev_sibling_id)));
+  }
+
+  void ExpectChildNodeRemoved(int parent_id, int node_id) {
+    EXPECT_EQ(1, frontend_channel()->CountProtocolNotificationMessage(
+                     base::StringPrintf(
+                         "{\"method\":\"DOM.childNodeRemoved\",\"params\":{"
+                         "\"parentNodeId\":%d,\"nodeId\":%d}}",
+                         parent_id, node_id)));
+  }
+
+  FakeFrontendChannel* frontend_channel() {
+    return fake_frontend_channel_.get();
+  }
+
   devtools::AshDevToolsDOMAgent* dom_agent() { return dom_agent_.get(); }
 
  private:
+  std::unique_ptr<UberDispatcher> uber_dispatcher_;
+  std::unique_ptr<FakeFrontendChannel> fake_frontend_channel_;
   std::unique_ptr<devtools::AshDevToolsDOMAgent> dom_agent_;
 
   DISALLOW_COPY_AND_ASSIGN(AshDevToolsTest);
@@ -129,25 +189,92 @@ TEST_F(AshDevToolsTest, GetDocumentWithWindowWidgetView) {
   widget->GetRootView()->AddChildView(child_view);
 
   std::unique_ptr<ui::devtools::protocol::DOM::Node> root;
-
   dom_agent()->getDocument(&root);
+
   DOM::Node* parent_node = FindInRoot(parent_window, root.get());
   DOM::Node* widget_node = FindInRoot(widget.get(), root.get());
-
   ASSERT_TRUE(parent_node);
   ASSERT_TRUE(widget_node);
-  Array<DOM::Node>* default_children = nullptr;
-  ASSERT_TRUE(parent_node->getChildren(default_children));
-  Compare(child_window, parent_node->getChildren(default_children)->get(0));
-  Array<DOM::Node>* widget_children =
-      widget_node->getChildren(default_children);
+  ASSERT_TRUE(parent_node->getChildren(nullptr));
+  Compare(child_window, parent_node->getChildren(nullptr)->get(0));
+  Array<DOM::Node>* widget_children = widget_node->getChildren(nullptr);
   ASSERT_TRUE(widget_children);
   Compare(widget->GetRootView(), widget_children->get(0));
-  ASSERT_TRUE(widget_children->get(0)->getChildren(default_children));
-  Compare(child_view,
-          widget_children->get(0)->getChildren(default_children)->get(1));
-  // TODO(mhashmi): Remove this call and mock FrontendChannel
-  dom_agent()->disable();
+  ASSERT_TRUE(widget_children->get(0)->getChildren(nullptr));
+  Compare(child_view, widget_children->get(0)->getChildren(nullptr)->get(1));
+}
+
+TEST_F(AshDevToolsTest, WindowAddedChildNodeInserted) {
+  // Initialize DOMAgent
+  std::unique_ptr<ui::devtools::protocol::DOM::Node> root;
+  dom_agent()->getDocument(&root);
+
+  WmWindow* parent_window = WmShell::Get()->GetPrimaryRootWindow();
+  DOM::Node* parent_node = root->getChildren(nullptr)->get(0);
+  Array<DOM::Node>* parent_node_children = parent_node->getChildren(nullptr);
+  DOM::Node* sibling_node =
+      parent_node_children->get(parent_node_children->length() - 1);
+
+  std::unique_ptr<WindowOwner> child_owner(CreateChildWindow(parent_window));
+  ExpectChildNodeInserted(parent_node->getNodeId(), sibling_node->getNodeId());
+}
+
+TEST_F(AshDevToolsTest, WindowDestroyedChildNodeRemoved) {
+  // Initialize DOMAgent
+  std::unique_ptr<ui::devtools::protocol::DOM::Node> root;
+  dom_agent()->getDocument(&root);
+
+  WmWindow* parent_window =
+      WmShell::Get()->GetPrimaryRootWindow()->GetChildren()[0];
+  WmWindow* child_window = parent_window->GetChildren()[0];
+  DOM::Node* root_node = root->getChildren(nullptr)->get(0);
+  DOM::Node* parent_node = root_node->getChildren(nullptr)->get(0);
+  DOM::Node* child_node = parent_node->getChildren(nullptr)->get(0);
+
+  child_window->Destroy();
+  ExpectChildNodeRemoved(parent_node->getNodeId(), child_node->getNodeId());
+}
+
+TEST_F(AshDevToolsTest, WindowReorganizedChildNodeRemovedAndInserted) {
+  // Initialize DOMAgent
+  std::unique_ptr<ui::devtools::protocol::DOM::Node> root;
+  dom_agent()->getDocument(&root);
+
+  WmWindow* root_window = WmShell::Get()->GetPrimaryRootWindow();
+  WmWindow* target_window = root_window->GetChildren()[1];
+  WmWindow* child_window = root_window->GetChildren()[0]->GetChildren()[0];
+
+  DOM::Node* root_node = root->getChildren(nullptr)->get(0);
+  DOM::Node* parent_node = root_node->getChildren(nullptr)->get(0);
+  DOM::Node* target_node = root_node->getChildren(nullptr)->get(1);
+  Array<DOM::Node>* target_node_children = target_node->getChildren(nullptr);
+  DOM::Node* sibling_node =
+      target_node_children->get(target_node_children->length() - 1);
+  DOM::Node* child_node = parent_node->getChildren(nullptr)->get(0);
+
+  target_window->AddChild(child_window);
+  ExpectChildNodeRemoved(parent_node->getNodeId(), child_node->getNodeId());
+  ExpectChildNodeInserted(target_node->getNodeId(), sibling_node->getNodeId());
+}
+
+TEST_F(AshDevToolsTest, WindowStackingChangedChildNodeRemovedAndInserted) {
+  // Initialize DOMAgent
+  std::unique_ptr<ui::devtools::protocol::DOM::Node> root;
+  dom_agent()->getDocument(&root);
+
+  WmWindow* parent_window = WmShell::Get()->GetPrimaryRootWindow();
+  WmWindow* child_window = parent_window->GetChildren()[0];
+  WmWindow* target_window = parent_window->GetChildren()[1];
+
+  DOM::Node* parent_node = root->getChildren(nullptr)->get(0);
+  Array<DOM::Node>* parent_node_children = parent_node->getChildren(nullptr);
+  DOM::Node* child_node = parent_node_children->get(0);
+  DOM::Node* sibling_node = parent_node_children->get(1);
+  int parent_id = parent_node->getNodeId();
+
+  parent_window->StackChildAbove(child_window, target_window);
+  ExpectChildNodeRemoved(parent_id, child_node->getNodeId());
+  ExpectChildNodeInserted(parent_id, sibling_node->getNodeId());
 }
 
 }  // namespace ash