Tab dragging as implemented as a mus API.

components/mus/ws/window_tree_unittest.cc

Index: components/mus/ws/window_tree_unittest.cc
diff --git a/components/mus/ws/window_tree_unittest.cc b/components/mus/ws/window_tree_unittest.cc
index a70fb59e415a2851359bda651349b7e5efde615b..79075eee9d57637196cd972002f2492345f14ca5 100644
--- a/components/mus/ws/window_tree_unittest.cc
+++ b/components/mus/ws/window_tree_unittest.cc
@@ -14,6 +14,7 @@
 #include "base/strings/stringprintf.h"
 #include "components/mus/common/types.h"
 #include "components/mus/common/util.h"
+#include "components/mus/public/cpp/lib/in_flight_change.h"
 #include "components/mus/public/interfaces/window_tree.mojom.h"
 #include "components/mus/surfaces/surfaces_state.h"
 #include "components/mus/ws/default_access_policy.h"
@@ -94,6 +95,24 @@ mojom::EventMatcherPtr CreateEventMatcher(ui::mojom::EventType type) {
   return matcher;
 }
 
+class TestMoveLoopWindowManager : public TestWindowManager {
+ public:
+  TestMoveLoopWindowManager(WindowTree* tree) : tree_(tree) {}
+  ~TestMoveLoopWindowManager() override {}
+
+  void WmPerformMoveLoop(uint32_t change_id,
+                         uint32_t window_id,
+                         const gfx::Point& cursor_location) override {
+    static_cast<mojom::WindowManagerClient*>(tree_)->OnWmMoveLoopCompleted(
+        change_id, window_id, true);
+  }
+
+ private:
+  WindowTree* tree_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestMoveLoopWindowManager);
+};
+
 }  // namespace
 
 // -----------------------------------------------------------------------------
@@ -1008,6 +1027,162 @@ TEST_F(WindowTreeTest, SetCaptureTargetsRightConnection) {
   EXPECT_EQ(embed_tree, wm_state_test_api.tree_awaiting_input_ack());
 }
 
+TEST_F(WindowTreeTest, ValidMoveLoopWithWM) {
+  TestWindowManager wm_internal;
+  set_window_manager_internal(wm_tree(), &wm_internal);
+
+  TestWindowTreeBinding* child_binding;
+  WindowTree* child_tree = CreateNewTree(wm_tree()->user_id(), &child_binding);
+  child_binding->client()->tracker()->changes()->clear();
+  child_binding->client()->set_record_on_change_completed(true);
+
+  // Create a new top level window.
+  mojo::Map<mojo::String, mojo::Array<uint8_t>> properties;
+  const uint32_t initial_change_id = 17;
+  // Explicitly use an id that does not contain the client id.
+  const ClientWindowId embed_window_id2_in_child(45 << 16 | 27);
+  static_cast<mojom::WindowTree*>(child_tree)
+      ->NewTopLevelWindow(initial_change_id, embed_window_id2_in_child.id,
+                          std::move(properties));
+
+  // The binding should be paused until the wm acks the change.
+  uint32_t wm_change_id = 0u;
+  ASSERT_TRUE(wm_internal.did_call_create_top_level_window(&wm_change_id));
+  EXPECT_TRUE(child_binding->is_paused());
+
+  // Create the window for |embed_window_id2_in_child|.
+  const ClientWindowId embed_window_id2 = BuildClientWindowId(wm_tree(), 2);
+  EXPECT_TRUE(
+      wm_tree()->NewWindow(embed_window_id2, ServerWindow::Properties()));
+  EXPECT_TRUE(wm_tree()->SetWindowVisibility(embed_window_id2, true));
+  EXPECT_TRUE(wm_tree()->AddWindow(FirstRootId(wm_tree()), embed_window_id2));
+
+  // Ack the change, which should resume the binding.
+  child_binding->client()->tracker()->changes()->clear();
+  static_cast<mojom::WindowManagerClient*>(wm_tree())
+      ->OnWmCreatedTopLevelWindow(wm_change_id, embed_window_id2.id);
+  EXPECT_FALSE(child_binding->is_paused());
+
+  // The child_tree is the one that has to make this call; the
+  const uint32_t change_id = 7;
+  static_cast<mojom::WindowTree*>(child_tree)
+      ->PerformWindowMove(change_id, embed_window_id2_in_child.id,
+                          gfx::Point(0, 0));
+
+  EXPECT_TRUE(wm_internal.on_perform_move_loop_called());
+}
+
+TEST_F(WindowTreeTest, MoveLoopAckOKByWM) {
+  TestMoveLoopWindowManager wm_internal(wm_tree());
+  set_window_manager_internal(wm_tree(), &wm_internal);
+
+  TestWindowTreeBinding* child_binding;
+  WindowTree* child_tree = CreateNewTree(wm_tree()->user_id(), &child_binding);
+  child_binding->client()->tracker()->changes()->clear();
+  child_binding->client()->set_record_on_change_completed(true);
+
+  // Create a new top level window.
+  mojo::Map<mojo::String, mojo::Array<uint8_t>> properties;
+  const uint32_t initial_change_id = 17;
+  // Explicitly use an id that does not contain the client id.
+  const ClientWindowId embed_window_id2_in_child(45 << 16 | 27);
+  static_cast<mojom::WindowTree*>(child_tree)
+      ->NewTopLevelWindow(initial_change_id, embed_window_id2_in_child.id,
+                          std::move(properties));
+
+  // The binding should be paused until the wm acks the change.
+  uint32_t wm_change_id = 0u;
+  ASSERT_TRUE(wm_internal.did_call_create_top_level_window(&wm_change_id));
+  EXPECT_TRUE(child_binding->is_paused());
+
+  // Create the window for |embed_window_id2_in_child|.
+  const ClientWindowId embed_window_id2 = BuildClientWindowId(wm_tree(), 2);
+  EXPECT_TRUE(
+      wm_tree()->NewWindow(embed_window_id2, ServerWindow::Properties()));
+  EXPECT_TRUE(wm_tree()->SetWindowVisibility(embed_window_id2, true));
+  EXPECT_TRUE(wm_tree()->AddWindow(FirstRootId(wm_tree()), embed_window_id2));
+
+  // Ack the change, which should resume the binding.
+  child_binding->client()->tracker()->changes()->clear();
+  static_cast<mojom::WindowManagerClient*>(wm_tree())
+      ->OnWmCreatedTopLevelWindow(wm_change_id, embed_window_id2.id);
+  EXPECT_FALSE(child_binding->is_paused());
+
+  // The child_tree is the one that has to make this call; the
+  const uint32_t change_id = 7;
+  child_binding->client()->tracker()->changes()->clear();
+  static_cast<mojom::WindowTree*>(child_tree)
+      ->PerformWindowMove(change_id, embed_window_id2_in_child.id,
+                          gfx::Point(0, 0));
+
+  EXPECT_EQ("ChangeCompleted id=7 sucess=true",
+            SingleChangeToDescription(
+                *child_binding->client()->tracker()->changes()));
+}
+
+TEST_F(WindowTreeTest, WindowManagerCantMoveLoop) {
+  TestWindowManager wm_internal;
+  set_window_manager_internal(wm_tree(), &wm_internal);
+
+  TestWindowTreeBinding* child_binding;
+  WindowTree* child_tree = CreateNewTree(wm_tree()->user_id(), &child_binding);
+  child_binding->client()->tracker()->changes()->clear();
+  child_binding->client()->set_record_on_change_completed(true);
+
+  // Create a new top level window.
+  mojo::Map<mojo::String, mojo::Array<uint8_t>> properties;
+  const uint32_t initial_change_id = 17;
+  // Explicitly use an id that does not contain the client id.
+  const ClientWindowId embed_window_id2_in_child(45 << 16 | 27);
+  static_cast<mojom::WindowTree*>(child_tree)
+      ->NewTopLevelWindow(initial_change_id, embed_window_id2_in_child.id,
+                          std::move(properties));
+
+  // The binding should be paused until the wm acks the change.
+  uint32_t wm_change_id = 0u;
+  ASSERT_TRUE(wm_internal.did_call_create_top_level_window(&wm_change_id));
+  EXPECT_TRUE(child_binding->is_paused());
+
+  // Create the window for |embed_window_id2_in_child|.
+  const ClientWindowId embed_window_id2 = BuildClientWindowId(wm_tree(), 2);
+  EXPECT_TRUE(
+      wm_tree()->NewWindow(embed_window_id2, ServerWindow::Properties()));
+  EXPECT_TRUE(wm_tree()->SetWindowVisibility(embed_window_id2, true));
+  EXPECT_TRUE(wm_tree()->AddWindow(FirstRootId(wm_tree()), embed_window_id2));
+
+  // Ack the change, which should resume the binding.
+  child_binding->client()->tracker()->changes()->clear();
+  static_cast<mojom::WindowManagerClient*>(wm_tree())
+      ->OnWmCreatedTopLevelWindow(wm_change_id, embed_window_id2.id);
+  EXPECT_FALSE(child_binding->is_paused());
+
+  // Making this call from the wm_tree() must be invalid.
+  const uint32_t change_id = 7;
+  static_cast<mojom::WindowTree*>(wm_tree())->PerformWindowMove(
+      change_id, embed_window_id2.id, gfx::Point(0, 0));
+
+  EXPECT_FALSE(wm_internal.on_perform_move_loop_called());
+}
+
+TEST_F(WindowTreeTest, InvalidMoveLoopStillAcksAttempt) {
+  // We send a PerformWindowMove for an invalid window. We expect to receive a
+  // non-success OnMoveLoopCompleted() event.
+  TestWindowTreeClient* embed_client = nullptr;
+  WindowTree* tree = nullptr;
+  ServerWindow* window = nullptr;
+  EXPECT_NO_FATAL_FAILURE(SetupEventTargeting(&embed_client, &tree, &window));
+
+  embed_client->set_record_on_change_completed(true);
+
+  const uint32_t kChangeId = 8;
+  const Id kInvalidWindowId = 1234567890;
+  static_cast<mojom::WindowTree*>(tree)->PerformWindowMove(
+      kChangeId, kInvalidWindowId, gfx::Point(0, 0));
+
+  EXPECT_EQ("ChangeCompleted id=8 sucess=false",
+            SingleChangeToDescription(*embed_client->tracker()->changes()));
+}
+
 }  // namespace test
 }  // namespace ws
 }  // namespace mus