Don't change the media controls visibility in MediaControls::reset()

Source/core/html/shadow/MediaControlsTest.cpp

Index: Source/core/html/shadow/MediaControlsTest.cpp
diff --git a/Source/core/html/shadow/MediaControlsTest.cpp b/Source/core/html/shadow/MediaControlsTest.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..31a29ae0c5c6582c085350615c01d1cee3193ccf
--- /dev/null
+++ b/Source/core/html/shadow/MediaControlsTest.cpp
@@ -0,0 +1,106 @@
+// Copyright 2015 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 "config.h"
+#include "core/html/shadow/MediaControls.h"
+
+#include "core/HTMLNames.h"
+#include "core/css/StylePropertySet.h"
+#include "core/dom/Document.h"
+#include "core/dom/ElementTraversal.h"
+#include "core/html/HTMLVideoElement.h"
+#include "core/testing/DummyPageHolder.h"
+#include <gtest/gtest.h>
+
+namespace blink {
+
+namespace {
+
+Element* getElementByShadowPseudoId(Node& rootNode, const char* shadowPseudoId)
+{
+    for (Element& element : ElementTraversal::descendantsOf(rootNode)) {
+        if (element.fastGetAttribute(HTMLNames::pseudoAttr) == shadowPseudoId)
+            return &element;
+    }
+    return nullptr;
+}
+
+bool isElementVisible(Element& element)
+{
+    const StylePropertySet* inlineStyle = element.inlineStyle();
+
+    if (!inlineStyle)
+        return true;
+
+    if (inlineStyle->getPropertyValue(CSSPropertyDisplay) == "none")
+        return false;
+
+    if (inlineStyle->hasProperty(CSSPropertyOpacity)
+        && inlineStyle->getPropertyValue(CSSPropertyOpacity).toDouble() == 0.0)
+        return false;
+
+    if (inlineStyle->getPropertyValue(CSSPropertyVisibility) == "hidden")
+        return false;
+
+    if (Element* parent = element.parentElement())
+        return isElementVisible(*parent);
+
+    return true;
+}
+
+} // namespace
+
+class MediaControlsTest : public testing::Test {
+protected:
+    virtual void SetUp()
+    {
+        m_pageHolder = DummyPageHolder::create(IntSize(800, 600));
+        Document& document = m_pageHolder->document();
+        document.write("<video controls>");
+        HTMLVideoElement& video = toHTMLVideoElement(*document.querySelector("video", ASSERT_NO_EXCEPTION));
+        m_mediaControls = video.mediaControls();
+    }
+
+    MediaControls& mediaControls() { return *m_mediaControls; }
+
+private:
+    OwnPtr<DummyPageHolder> m_pageHolder;
+    MediaControls* m_mediaControls;
+};
+
+TEST_F(MediaControlsTest, HideAndShow)
+{
+    Element* panel = getElementByShadowPseudoId(mediaControls(), "-webkit-media-controls-panel");
+    ASSERT_NE(nullptr, panel);
+
+    ASSERT_TRUE(isElementVisible(*panel));
+    mediaControls().hide();
+    ASSERT_FALSE(isElementVisible(*panel));
+    mediaControls().show();
+    ASSERT_TRUE(isElementVisible(*panel));
+}
+
+TEST_F(MediaControlsTest, Reset)
+{
+    Element* panel = getElementByShadowPseudoId(mediaControls(), "-webkit-media-controls-panel");
+    ASSERT_NE(nullptr, panel);
+
+    ASSERT_TRUE(isElementVisible(*panel));
+    mediaControls().reset();
+    ASSERT_TRUE(isElementVisible(*panel));
+}
+
+TEST_F(MediaControlsTest, HideAndReset)
+{
+    Element* panel = getElementByShadowPseudoId(mediaControls(), "-webkit-media-controls-panel");
+    ASSERT_NE(nullptr, panel);
+
+    ASSERT_TRUE(isElementVisible(*panel));
+    mediaControls().hide();
+    ASSERT_FALSE(isElementVisible(*panel));
+    mediaControls().reset();
+    ASSERT_FALSE(isElementVisible(*panel));
+}
+
+} // namespace blink