Added a views::test::TestInkDropAnimationObserverHelper

ui/views/animation/test/test_animation_observer.h

+// 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 UI_VIEWS_ANIMATION_TEST_TEST_ANIMATION_OBSERVER_H_
+#define UI_VIEWS_ANIMATION_TEST_TEST_ANIMATION_OBSERVER_H_
+
+#include <algorithm>
+
+#include "base/macros.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/views/animation/animation_observer.h"
+
+namespace views {
+namespace test {
+
+// Test double implementation for AnimationObserver<ContextType> observers that
+// tracks the last observations of the AnimationStarted() and AnimationEnded()
+// methods.
+//
+// TestAnimationObserver inherits from the ParentType template parameter where
+// the ParentType should have AnimationObserver<ContextType> as an ancestor
+// type.
+template <typename ParentType, typename ContextType>
+class TestAnimationObserver : public ParentType {
+ public:
+  TestAnimationObserver()
+      : last_animation_started_ordinal_(-1),
+        last_animation_started_context_(),
+        last_animation_ended_ordinal_(-1),
+        last_animation_ended_context_(),
+        last_animation_ended_reason_(ParentType::SUCCESS) {}
+
+  virtual ~TestAnimationObserver() {}
+
+  int last_animation_started_ordinal() const {
+    return last_animation_started_ordinal_;
+  }
+
+  ContextType last_animation_started_context() const {
+    return last_animation_started_context_;
+  }
+
+  int last_animation_ended_ordinal() const {
+    return last_animation_ended_ordinal_;
+  }
+
+  ContextType last_animation_ended_context() const {
+    return last_animation_ended_context_;
+  }
+
+  typename ParentType::AnimationEndedReason last_animation_ended_reason()
+      const {
+    return last_animation_ended_reason_;
+  }
+
+  // AnimationObserver<ContextType> overrides:
+
+  void AnimationStarted(ContextType context) override {
+    last_animation_started_context_ = context;
+    last_animation_started_ordinal_ = GetNextOrdinal();
+  }
+
+  void AnimationEnded(
+      ContextType context,
+      typename ParentType::AnimationEndedReason reason) override {
+    last_animation_ended_context_ = context;
+    last_animation_ended_ordinal_ = GetNextOrdinal();
+    last_animation_ended_reason_ = reason;
+  }
+
+  //
+  // Collection of assertion predicates to be used with GTest test assertions.
+  // i.e. EXPECT_TRUE/EXPECT_FALSE and the ASSERT_ counterparts.
+  //
+  // Example:
+  //
+  //   TestInkDropAnimationObserver observer;
+  //   observer.set_ink_drop_animation(ink_drop_animation);
+  //   EXPECT_TRUE(observer.AnimationHasNotStarted());
+  //
+
+  // Passes *_TRUE assertions when an InkDropAnimationStarted() event has been
+  // observed.
+  testing::AssertionResult AnimationHasStarted() {
+    if (last_animation_started_ordinal() > 0) {
+      return testing::AssertionSuccess()
+             << "Animations were started at ordinal="
+             << last_animation_started_ordinal() << ".";
+    }
+    return testing::AssertionFailure() << "Animations have not started.";
+  }
+
+  // Passes *_TRUE assertions when an InkDropAnimationStarted() event has NOT
+  // been observed.
+  testing::AssertionResult AnimationHasNotStarted() {
+    if (last_animation_started_ordinal() < 0)
+      return testing::AssertionSuccess();
+    return testing::AssertionFailure() << "Animations were started at ordinal="
+                                       << last_animation_started_ordinal()
+                                       << ".";
+  }
+
+  // Passes *_TRUE assertions when an InkDropAnimationEnded() event has been
+  // observed.
+  testing::AssertionResult AnimationHasEnded() {
+    if (last_animation_ended_ordinal() > 0) {
+      return testing::AssertionSuccess() << "Animations were ended at ordinal="
+                                         << last_animation_ended_ordinal()
+                                         << ".";
+    }
+    return testing::AssertionFailure() << "Animations have not ended.";
+  }
+
+  // Passes *_TRUE assertions when an InkDropAnimationEnded() event has NOT been
+  // observed.
+  testing::AssertionResult AnimationHasNotEnded() {
+    if (last_animation_ended_ordinal() < 0)
+      return testing::AssertionSuccess();
+    return testing::AssertionFailure() << "Animations were ended at ordinal="
+                                       << last_animation_ended_ordinal() << ".";
+  }
+
+ private:
+  // Returns the next event ordinal. The first returned ordinal will be 1.
+  int GetNextOrdinal() const {
+    return std::max(1, std::max(last_animation_started_ordinal_,
+                                last_animation_ended_ordinal_) +
+                           1);
+  }
+
+  // The ordinal time of the last AnimationStarted() call.
+  int last_animation_started_ordinal_;
+
+  // The |context| passed to the last call to AnimationStarted().
+  ContextType last_animation_started_context_;
+
+  // The ordinal time of the last AnimationEnded() call.
+  int last_animation_ended_ordinal_;
+
+  // The |context| passed to the last call to AnimationEnded().
+  ContextType last_animation_ended_context_;
+
+  typename ParentType::AnimationEndedReason last_animation_ended_reason_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestAnimationObserver);
+};
+
+}  // namespace test
+}  // namespace views
+
+#endif  // UI_VIEWS_ANIMATION_TEST_TEST_ANIMATION_OBSERVER_H_