Mozart: Add helpers for building view associates.

mojo/ui/associates/mock_hit_tester.h

Index: mojo/ui/associates/mock_hit_tester.h
diff --git a/mojo/ui/associates/mock_hit_tester.h b/mojo/ui/associates/mock_hit_tester.h
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+++ b/mojo/ui/associates/mock_hit_tester.h
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+// 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.
+
+#ifndef MOJO_UI_ASSOCIATES_MOCK_HIT_TESTER_H_
+#define MOJO_UI_ASSOCIATES_MOCK_HIT_TESTER_H_
+
+#include <unordered_map>
+
+#include "base/macros.h"
+#include "mojo/services/gfx/composition/interfaces/hit_tests.mojom.h"
+
+namespace mojo {
+namespace ui {
+
+// TODO(jeffbrown): Move this someplace closer to mojo::gfx::composition
+class MockHitTester : public mojo::gfx::composition::HitTester {
+ public:
+  MockHitTester();
+  ~MockHitTester() override;
+
+  // Sets the next hit test result.
+  void SetNextResult(mojo::PointPtr point,
+                     mojo::gfx::composition::HitTestResultPtr result);
+
+  // |HitTester|
+  void HitTest(mojo::PointPtr point, const HitTestCallback& callback) override;
+
+ private:
+  mojo::PointPtr point_;
+  mojo::gfx::composition::HitTestResultPtr result_;
+
+  DISALLOW_COPY_AND_ASSIGN(MockHitTester);
+};
+
+}  // namespace ui
+}  // namespace mojo
+
+#endif  // MOJO_UI_ASSOCIATES_MOCK_HIT_TESTER_H_