Implement hit tests/client area.

ui/aura/mus/window_tree_host_mus_unittest.cc

Index: ui/aura/mus/window_tree_host_mus_unittest.cc
diff --git a/ui/aura/mus/window_tree_host_mus_unittest.cc b/ui/aura/mus/window_tree_host_mus_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..7e69dc9253ba7ae5a09bf33d0d371abb137c1621
--- /dev/null
+++ b/ui/aura/mus/window_tree_host_mus_unittest.cc
@@ -0,0 +1,133 @@
+// Copyright 2016 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 "ui/aura/mus/window_tree_host_mus.h"
+
+#include "base/message_loop/message_loop.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/aura/client/default_capture_client.h"
+#include "ui/aura/client/focus_client.h"
+#include "ui/aura/env.h"
+#include "ui/aura/mus/property_converter.h"
+#include "ui/aura/mus/window_port_mus.h"
+#include "ui/aura/mus/window_tree_client_delegate.h"
+#include "ui/aura/mus/window_tree_host_mus.h"
+#include "ui/aura/test/env_test_helper.h"
+#include "ui/aura/test/mus/test_window_tree.h"
+#include "ui/aura/test/mus/test_window_tree_client_setup.h"
+#include "ui/aura/test/test_focus_client.h"
+#include "ui/aura/test/test_screen.h"
+#include "ui/aura/window_port_local.h"
+#include "ui/compositor/test/context_factories_for_test.h"
+#include "ui/wm/core/wm_state.h"
+
+namespace aura {
+
+// AuraMusClientTestBase doesn't appear to be going through the
+// WindowTreeHostMus path at all. So instead, we create a minimal environment

[sky, 2016/11/19 15:29:31]

There is a TODO about making the default display and root do something different
for mus, but you can certainly subclass AuraMusClientTestBase and then create
your own WindowTreeHostMus. See WindowTreeClientClientTest.InputEventBasic as an
example of this. I think that should work for your case here and would mean you
don't need to copy all this boilerplate. By this I mean:
using WindowTreeHostMusTest = AuraMusClientTestBase;
and create a WindowTreeHostMus() in your test. window_tree() returns the
TestWindowTree.

[Elliot Glaysher, 2016/11/22 00:48:07]

Done.

The confusion on my end was having aura::WindowTreeClient and
ui::mojom::WindowTreeClient. Not a fan of having the same class name in
different namespaces because we don't always fully qualify some of these names.

+// where we build our own TestWindowTree and Window.
+class WindowTreeHostMusTest : public testing::Test,
+                              public aura::WindowTreeClientDelegate {
+ public:
+  WindowTreeHostMusTest() {}
+  ~WindowTreeHostMusTest() override {}
+
+  void SetUp() override {
+    Test::SetUp();
+    wm_state_ = base::MakeUnique<wm::WMState>();
+    focus_client_ = base::MakeUnique<test::TestFocusClient>();
+    capture_client_ = base::MakeUnique<client::DefaultCaptureClient>();
+    property_converter_ = base::MakeUnique<aura::PropertyConverter>();
+
+    // The ContextFactory must exist before any Compositors are created.
+    bool enable_pixel_output = false;
+    ui::ContextFactory* context_factory =
+        ui::InitializeContextFactoryForTests(enable_pixel_output);
+
+    if (!Env::GetInstanceDontCreate())
+      env_ = Env::CreateInstance(Env::Mode::MUS);
+    Env::GetInstance()->set_context_factory(context_factory);
+
+    window_tree_client_setup_ = base::MakeUnique<TestWindowTreeClientSetup>();
+    window_tree_client_setup_->Init(this);
+
+    test_screen_.reset(TestScreen::Create(gfx::Size(800, 600)));
+    display::Screen::SetScreenInstance(test_screen_.get());
+
+    window_tree_host_mus_ =
+        base::MakeUnique<WindowTreeHostMus>(window_tree_client());
+  }
+
+  void TearDown() override {
+    window_tree_host_mus_.reset();
+    if (display::Screen::GetScreen() == test_screen_.get())
+      display::Screen::SetScreenInstance(nullptr);
+    window_tree_client_setup_.reset();
+
+    ui::TerminateContextFactoryForTests();
+    Test::TearDown();
+  }
+
+  WindowTreeHostMus* window_tree_host_mus() {
+    return window_tree_host_mus_.get();
+  }
+
+  TestWindowTree* test_window_tree() {
+    return window_tree_client_setup_->window_tree();
+  }
+
+  WindowTreeClient* window_tree_client() {
+    return window_tree_client_setup_->window_tree_client();
+  }
+
+ private:
+  // WindowTreeClientDelegate:
+  void OnEmbed(
+      std::unique_ptr<aura::WindowTreeHostMus> window_tree_host) override {}
+  void OnLostConnection(aura::WindowTreeClient* client) override {}
+  void OnEmbedRootDestroyed(aura::Window* root) override {}
+  void OnPointerEventObserved(const ui::PointerEvent& event,
+                              aura::Window* target) override {}
+  aura::client::CaptureClient* GetCaptureClient() override {
+    return capture_client_.get();
+  }
+  aura::PropertyConverter* GetPropertyConverter() override {
+    return property_converter_.get();
+  }
+
+  // Needed by the compositor.
+  base::MessageLoopForUI message_loop_;
+
+  std::unique_ptr<aura::Env> env_;
+
+  std::unique_ptr<wm::WMState> wm_state_;
+  std::unique_ptr<client::DefaultCaptureClient> capture_client_;
+  std::unique_ptr<client::FocusClient> focus_client_;
+  std::unique_ptr<aura::PropertyConverter> property_converter_;
+  std::unique_ptr<TestWindowTreeClientSetup> window_tree_client_setup_;
+  std::unique_ptr<TestScreen> test_screen_;
+
+  std::unique_ptr<aura::WindowTreeHostMus> window_tree_host_mus_;
+
+  DISALLOW_COPY_AND_ASSIGN(WindowTreeHostMusTest);
+};
+
+TEST_F(WindowTreeHostMusTest, UpdateClientArea) {
+  gfx::Insets new_insets(10, 11, 12, 13);
+  window_tree_host_mus()->SetClientArea(new_insets);
+  EXPECT_EQ(new_insets, test_window_tree()->last_client_area());
+}
+
+TEST_F(WindowTreeHostMusTest, SetHitTestMask) {
+  EXPECT_FALSE(test_window_tree()->last_hit_test_mask().has_value());
+  gfx::Rect mask(10, 10, 10, 10);
+  window_tree_host_mus()->SetHitTestMask(mask);
+  ASSERT_TRUE(test_window_tree()->last_hit_test_mask().has_value());
+  EXPECT_EQ(mask, test_window_tree()->last_hit_test_mask());
+
+  window_tree_host_mus()->ClearHitTestMask();
+  ASSERT_FALSE(test_window_tree()->last_hit_test_mask().has_value());
+}
+
+}  // namespace aura