Mozart: Add helpers for building view associates.

mojo/ui/associates/view_tree_hit_tester_client_apptest.cc

+// 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 "mojo/ui/associates/view_tree_hit_tester_client.h"
+
+#include <utility>
+
+#include "base/bind.h"
+#include "base/message_loop/message_loop.h"
+#include "base/run_loop.h"
+#include "mojo/public/cpp/application/application_impl.h"
+#include "mojo/public/cpp/application/application_test_base.h"
+#include "mojo/ui/associates/mock_hit_tester.h"
+#include "mojo/ui/associates/mock_view_inspector.h"
+#include "mojo/ui/associates/test_helpers.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace test {
+
+class ViewTreeHitTesterClientTest : public mojo::test::ApplicationTestBase {
+ public:
+  ViewTreeHitTesterClientTest() : view_inspector_binding_(&view_inspector_) {}
+  ~ViewTreeHitTesterClientTest() override {}
+
+  void SetUp() override {
+    mojo::test::ApplicationTestBase::SetUp();
+
+    mojo::ui::ViewInspectorPtr view_inspector_ptr;
+    view_inspector_binding_.Bind(&view_inspector_ptr);
+    view_inspector_client_ =
+        new mojo::ui::ViewInspectorClient(view_inspector_ptr.Pass());
+
+    view_tree_token_ = mojo::ui::ViewTreeToken::New();
+    view_tree_token_->value = 1u;
+    view_tree_hit_tester_client_ = new mojo::ui::ViewTreeHitTesterClient(
+        view_inspector_client_, view_tree_token_.Clone());
+  }
+
+ protected:
+  void HitTest(mojo::PointPtr point,
+               scoped_ptr<mojo::ui::ResolvedHits>* resolved_hits) {
+    base::RunLoop loop;
+    view_tree_hit_tester_client_->HitTest(
+        point.Pass(), base::Bind(&Capture<scoped_ptr<mojo::ui::ResolvedHits>>,
+                                 loop.QuitClosure(), resolved_hits));
+    loop.Run();
+  }
+
+  mojo::ui::MockViewInspector view_inspector_;
+  mojo::Binding<mojo::ui::ViewInspector> view_inspector_binding_;
+  scoped_refptr<mojo::ui::ViewInspectorClient> view_inspector_client_;
+
+  mojo::ui::ViewTreeTokenPtr view_tree_token_;
+  scoped_refptr<mojo::ui::ViewTreeHitTesterClient> view_tree_hit_tester_client_;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ViewTreeHitTesterClientTest);
+};
+
+TEST_F(ViewTreeHitTesterClientTest, NoHitTester) {
+  scoped_ptr<mojo::ui::ResolvedHits> resolved_hits;
+  HitTest(MakePoint(0, 0), &resolved_hits);
+  EXPECT_EQ(nullptr, resolved_hits.get());
+}
+
+TEST_F(ViewTreeHitTesterClientTest, HaveHitTester) {
+  auto scene_token_1 = MakeSceneToken(1u);
+  auto view_token_11 = MakeViewToken(11u);
+  auto transform_111 = MakeTransform(111);
+  auto transform_222 = MakeTransform(222);
+  auto transform_333 = MakeTransform(333);
+  view_inspector_.SetSceneMapping(scene_token_1->value, view_token_11.Clone());
+
+  mojo::ui::MockHitTester hit_tester;
+  view_inspector_.SetHitTester(view_tree_token_->value, &hit_tester);
+
+  // Simple hit test with the first hit tester.
+  hit_tester.SetNextResult(
+      MakePoint(2, 5),
+      MakeSimpleHitTestResult(scene_token_1.Clone(), transform_111.Clone()));
+  scoped_ptr<mojo::ui::ResolvedHits> resolved_hits;
+  HitTest(MakePoint(2, 5), &resolved_hits);
+  ASSERT_NE(nullptr, resolved_hits.get());
+  EXPECT_NE(nullptr, resolved_hits->result());
+  EXPECT_EQ(1u, resolved_hits->map().size());
+  EXPECT_TRUE(
+      view_token_11.Equals(resolved_hits->map().at(scene_token_1->value)));
+  EXPECT_TRUE(transform_111.Equals(
+      resolved_hits->result()->root->hits[0]->get_node()->transform));
+  EXPECT_EQ(1u, view_inspector_.hit_tester_lookups());
+  EXPECT_EQ(1u, view_inspector_.scene_lookups());
+
+  // Do it again, should reuse the same hit tester.
+  hit_tester.SetNextResult(
+      MakePoint(3, 4),
+      MakeSimpleHitTestResult(scene_token_1.Clone(), transform_222.Clone()));
+  HitTest(MakePoint(3, 4), &resolved_hits);
+  ASSERT_NE(nullptr, resolved_hits.get());
+  EXPECT_NE(nullptr, resolved_hits->result());
+  EXPECT_EQ(1u, resolved_hits->map().size());
+  EXPECT_TRUE(
+      view_token_11.Equals(resolved_hits->map().at(scene_token_1->value)));
+  EXPECT_TRUE(transform_222.Equals(
+      resolved_hits->result()->root->hits[0]->get_node()->transform));
+  EXPECT_EQ(1u, view_inspector_.hit_tester_lookups());
+  EXPECT_EQ(1u, view_inspector_.scene_lookups());
+
+  // Replace the hit tester, ensuring that another lookup occurs.
+  mojo::ui::MockHitTester hit_tester_2;
+  {
+    base::RunLoop loop;
+    view_tree_hit_tester_client_->set_hit_tester_changed_callback(
+        loop.QuitClosure());
+    view_inspector_.SetHitTester(view_tree_token_->value, &hit_tester_2);
+    loop.Run();
+  }
+
+  // Try to use the new hit tester.
+  hit_tester_2.SetNextResult(
+      MakePoint(7, 8),
+      MakeSimpleHitTestResult(scene_token_1.Clone(), transform_333.Clone()));
+  HitTest(MakePoint(7, 8), &resolved_hits);
+  ASSERT_NE(nullptr, resolved_hits.get());
+  EXPECT_NE(nullptr, resolved_hits->result());
+  EXPECT_EQ(1u, resolved_hits->map().size());
+  EXPECT_TRUE(
+      view_token_11.Equals(resolved_hits->map().at(scene_token_1->value)));
+  EXPECT_TRUE(transform_333.Equals(
+      resolved_hits->result()->root->hits[0]->get_node()->transform));
+  EXPECT_EQ(2u, view_inspector_.hit_tester_lookups());
+  EXPECT_EQ(1u, view_inspector_.scene_lookups());
+
+  // Cause the hit tester to be closed.
+  {
+    base::RunLoop loop;
+    view_tree_hit_tester_client_->set_hit_tester_changed_callback(
+        loop.QuitClosure());
+    view_inspector_.CloseHitTesterBindings();
+    loop.Run();
+  }
+
+  // Hit testing should not work anymore.
+  HitTest(MakePoint(0, 0), &resolved_hits);
+  EXPECT_EQ(nullptr, resolved_hits.get());
+}
+
+}  // namespace test