[Blink>Media] Add heuristic for dominant video detection for Android

third_party/WebKit/Source/core/html/MediaCustomControlsFullscreenDetectorTest.cpp

Index: third_party/WebKit/Source/core/html/MediaCustomControlsFullscreenDetectorTest.cpp
diff --git a/third_party/WebKit/Source/core/html/MediaCustomControlsFullscreenDetectorTest.cpp b/third_party/WebKit/Source/core/html/MediaCustomControlsFullscreenDetectorTest.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..2d7fa04925713e13216932bc04000c41a317c787
--- /dev/null
+++ b/third_party/WebKit/Source/core/html/MediaCustomControlsFullscreenDetectorTest.cpp
@@ -0,0 +1,126 @@
+// Copyright 2017 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 "core/html/MediaCustomControlsFullscreenDetector.h"
+
+#include "core/EventTypeNames.h"
+#include "core/html/HTMLVideoElement.h"
+#include "core/testing/DummyPageHolder.h"
+#include "platform/geometry/IntRect.h"
+#include "public/platform/WebMediaPlayer.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace blink {
+
+namespace {
+
+struct TestParam {
+  String description;
+  IntRect targetRect;
+  bool expectedResult;
+};
+
+}  // anonymous namespace
+
+class MediaCustomControlsFullscreenDetectorTest : public ::testing::Test {
+ protected:
+  void SetUp() override {
+    m_pageHolder = DummyPageHolder::create();
+    m_newPageHolder = DummyPageHolder::create();
+
+    m_video = HTMLVideoElement::create(m_pageHolder->document());
+    document().body()->appendChild(&videoElement());
+  }
+
+  HTMLVideoElement& videoElement() const { return *m_video; }
+  MediaCustomControlsFullscreenDetector& fullscreenDetector() const {
+    return *videoElement().m_customControlsFullscreenDetector;
+  }
+
+  Document& document() const { return m_pageHolder->document(); }
+  Document& newDocument() const { return m_newPageHolder->document(); }
+
+  bool checkEventListenerRegistered(EventTarget& target,
+                                    const AtomicString& eventType,
+                                    EventListener* listener) {
+    EventListenerVector* listeners = target.getEventListeners(eventType);
+    if (!listeners)
+      return false;
+
+    for (const auto& registeredListener : *listeners) {
+      if (registeredListener.listener() == listener)
+        return true;
+    }
+    return false;
+  }
+
+  static bool computeIsDominantVideo(const IntRect& targetRect,
+                                     const IntRect& rootRect,
+                                     const IntRect& intersectionRect) {
+    return MediaCustomControlsFullscreenDetector::
+        computeIsDominantVideoForTests(targetRect, rootRect, intersectionRect);
+  }
+
+ private:
+  std::unique_ptr<DummyPageHolder> m_pageHolder;
+  std::unique_ptr<DummyPageHolder> m_newPageHolder;
+  Persistent<HTMLVideoElement> m_video;
+};
+
+TEST_F(MediaCustomControlsFullscreenDetectorTest, computeIsDominantVideo) {
+  // TestWithParam cannot be applied here as IntRect needs the memory allocator
+  // to be initialized, but the array of parameters is statically initialized,
+  // which is before the memory allocation initialization.
+  TestParam testParams[] = {
+      {"xCompleteFill", {0, 0, 100, 50}, true},
+      {"yCompleteFill", {0, 0, 50, 100}, true},
+      {"xyCompleteFill", {0, 0, 100, 100}, true},
+      {"xIncompleteFillTooSmall", {0, 0, 84, 50}, false},
+      {"yIncompleteFillTooSmall", {0, 0, 50, 84}, false},
+      {"xIncompleteFillJustRight", {0, 0, 86, 50}, true},
+      {"yIncompleteFillJustRight", {0, 0, 50, 86}, true},
+      {"xVisibleProportionTooSmall", {-26, 0, 100, 100}, false},
+      {"yVisibleProportionTooSmall", {0, -26, 100, 100}, false},
+      {"xVisibleProportionJustRight", {-24, 0, 100, 100}, true},
+      {"yVisibleProportionJustRight", {0, -24, 100, 100}, true},
+  };
+
+  IntRect rootRect(0, 0, 100, 100);
+
+  for (const TestParam& testParam : testParams) {
+    const IntRect& targetRect = testParam.targetRect;
+    IntRect intersectionRect = intersection(targetRect, rootRect);
+    EXPECT_EQ(testParam.expectedResult,
+              computeIsDominantVideo(targetRect, rootRect, intersectionRect))
+        << testParam.description << " failed";
+  }
+}
+
+TEST_F(MediaCustomControlsFullscreenDetectorTest, documentMove) {
+  EXPECT_TRUE(checkEventListenerRegistered(
+      document(), EventTypeNames::fullscreenchange, &fullscreenDetector()));
+  EXPECT_TRUE(checkEventListenerRegistered(
+      document(), EventTypeNames::webkitfullscreenchange,
+      &fullscreenDetector()));
+  EXPECT_FALSE(checkEventListenerRegistered(
+      newDocument(), EventTypeNames::fullscreenchange, &fullscreenDetector()));
+  EXPECT_FALSE(checkEventListenerRegistered(
+      newDocument(), EventTypeNames::webkitfullscreenchange,
+      &fullscreenDetector()));
+
+  newDocument().body()->appendChild(&videoElement());
+
+  EXPECT_FALSE(checkEventListenerRegistered(
+      document(), EventTypeNames::fullscreenchange, &fullscreenDetector()));
+  EXPECT_FALSE(checkEventListenerRegistered(
+      document(), EventTypeNames::webkitfullscreenchange,
+      &fullscreenDetector()));
+  EXPECT_TRUE(checkEventListenerRegistered(
+      newDocument(), EventTypeNames::fullscreenchange, &fullscreenDetector()));
+  EXPECT_TRUE(checkEventListenerRegistered(
+      newDocument(), EventTypeNames::webkitfullscreenchange,
+      &fullscreenDetector()));
+}
+
+}  // namespace blink