Centered flood fill style ink drop ripples on mouse/touch points.

ui/views/animation/ink_drop_host_view_unittest.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 "ui/views/animation/ink_drop_host_view.h"
+
+#include "base/macros.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/events/event.h"
+#include "ui/events/event_constants.h"
+#include "ui/events/event_utils.h"
+#include "ui/gfx/geometry/point.h"
+#include "ui/gfx/geometry/size.h"
+#include "ui/views/animation/test/ink_drop_host_view_test_api.h"
+
+namespace views {
+namespace test {
+
+class InkDropHostViewTest : public testing::Test {
+ public:
+  InkDropHostViewTest();
+  ~InkDropHostViewTest() override;
+
+ protected:
+  // Test target.
+  InkDropHostView host_view_;
+
+  // Provides internal access to |host_view_| test target.
+  InkDropHostViewTestApi test_api_;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(InkDropHostViewTest);
+};
+
+InkDropHostViewTest::InkDropHostViewTest() : test_api_(&host_view_) {}
+
+InkDropHostViewTest::~InkDropHostViewTest() {}
+
+// Verifies the return value of GetInkDropCenterBasedOnLastEvent() for a null
+// Event.
+TEST_F(InkDropHostViewTest, GetInkDropCenterBasedOnLastEventForNullEvent) {
+  host_view_.SetSize(gfx::Size(20, 20));
+  test_api_.AnimateInkDrop(InkDropState::ACTION_PENDING, nullptr);
+  EXPECT_EQ(gfx::Point(10, 10), test_api_.GetInkDropCenterBasedOnLastEvent());
+}
+
+// Verifies the return value of GetInkDropCenterBasedOnLastEvent() for a located
+// Event.
+TEST_F(InkDropHostViewTest, GetInkDropCenterBasedOnLastEventForLocatedEvent) {
+  host_view_.SetSize(gfx::Size(20, 20));
+
+  ui::MouseEvent located_event(ui::ET_MOUSE_PRESSED, gfx::Point(5, 6),
+                               gfx::Point(5, 6), ui::EventTimeForNow(),
+                               ui::EF_LEFT_MOUSE_BUTTON, 0);
+
+  test_api_.AnimateInkDrop(InkDropState::ACTION_PENDING, &located_event);
+  EXPECT_EQ(gfx::Point(5, 6), test_api_.GetInkDropCenterBasedOnLastEvent());
+}
+
+}  // namespace test
+}  // namespace views