OverscrollGlow for mainThread-{BLINK CHANGES}

Source/web/tests/WebFrameTest.cpp

Index: Source/web/tests/WebFrameTest.cpp
diff --git a/Source/web/tests/WebFrameTest.cpp b/Source/web/tests/WebFrameTest.cpp
index 4351904cb1b84dd03fb324d86810f34742c2a423..76554b0ae90e028ed6745674e5075eba62be3e8d 100644
--- a/Source/web/tests/WebFrameTest.cpp
+++ b/Source/web/tests/WebFrameTest.cpp
@@ -236,7 +236,6 @@ protected:
         Element* element = frame->document()->getElementById(testcase.c_str());
         return frame->nodeImage(*element);
     }
-
     std::string m_baseURL;
     std::string m_notBaseURL;
     std::string m_chromeURL;
@@ -7411,4 +7410,129 @@ TEST_F(WebFrameTest, CreateLocalChildWithPreviousSibling)
     view->close();
 }
 
+class WebFrameOverscrollTest : public WebFrameTest {
+protected:
+    WebGestureEvent generateEvent(WebInputEvent::Type type, int deltaX = 0, int deltaY = 0)
+    {
+        WebGestureEvent event;
+        event.type = type;
+        event.x = 100;
+        event.y = 100;
+        if (type == WebInputEvent::GestureScrollUpdate) {
+            event.data.scrollUpdate.deltaX = deltaX;
+            event.data.scrollUpdate.deltaY = deltaY;
+        }
+        return event;
+    }
+
+    void ScrollBegin(FrameTestHelpers::WebViewHelper* webViewHelper)
+    {
+        webViewHelper->webViewImpl()->handleInputEvent(generateEvent(WebInputEvent::GestureScrollBegin));
+    }
+
+    void ScrollUpdate(FrameTestHelpers::WebViewHelper* webViewHelper, float deltaX, float deltaY)
+    {
+        webViewHelper->webViewImpl()->handleInputEvent(generateEvent(WebInputEvent::GestureScrollUpdate, deltaX, deltaY));
+    }
+
+    void ScrollEnd(FrameTestHelpers::WebViewHelper* webViewHelper)
+    {
+        webViewHelper->webViewImpl()->handleInputEvent(generateEvent(WebInputEvent::GestureScrollEnd));
+    }
+
+    void CompareUnusedDeltaAndAccumulatedRootOverscroll(FrameTestHelpers::WebViewHelper* webViewHelper, float unUsedWidth, float unUsedHeight, float accumulatedWidth, float accumulatedHeight)
+    {
+        FloatSize unUsedDelta = webViewHelper->webViewImpl()->mainFrameImpl()->frame()->eventHandler().unusedDeltaForTesting();
+        FloatSize accumulatedRootOverscroll = webViewHelper->webViewImpl()->mainFrameImpl()->frame()->eventHandler().accumulatedRootOverscrollForTesting();
+        EXPECT_EQ(unUsedWidth, unUsedDelta.width());
+        EXPECT_EQ(unUsedHeight, unUsedDelta.height());
+        EXPECT_EQ(accumulatedWidth, accumulatedRootOverscroll.width());
+        EXPECT_EQ(accumulatedHeight, accumulatedRootOverscroll.height());
+    }
+};
+
+TEST_F(WebFrameOverscrollTest, AccumulatedRootOverscrollAndUnsedDeltaSetAndUnset)
+{
+    FakeCompositingWebViewClient client;
+    registerMockedHttpURLLoad("mainthread-scrolling.html");
+    FrameTestHelpers::WebViewHelper webViewHelper;
+    WebViewImpl* webViewImpl = webViewHelper.initializeAndLoad(m_baseURL + "mainthread-scrolling.html", true, 0, &client, configureAndroid);
+    webViewImpl->layout();
+
+    ScrollBegin(&webViewHelper);
+
+    ScrollUpdate(&webViewHelper, 0, -13);
+    CompareUnusedDeltaAndAccumulatedRootOverscroll(&webViewHelper, 0, 13, 0, 13);
+
+    ScrollUpdate(&webViewHelper, 0, -13);
+    CompareUnusedDeltaAndAccumulatedRootOverscroll(&webViewHelper, 0, 13, 0, 26);
+
+    ScrollUpdate(&webViewHelper, -20, -13);
+    CompareUnusedDeltaAndAccumulatedRootOverscroll(&webViewHelper, 20, 13, 20, 39);
+
+    ScrollEnd(&webViewHelper);
+    CompareUnusedDeltaAndAccumulatedRootOverscroll(&webViewHelper, 0, 0, 0, 0);
+
+    ScrollBegin(&webViewHelper);
+    ScrollUpdate(&webViewHelper, 0, -13);
+    ScrollEnd(&webViewHelper);
+    CompareUnusedDeltaAndAccumulatedRootOverscroll(&webViewHelper, 0, 0, 0, 0);
+
+    ScrollBegin(&webViewHelper);
+    ScrollUpdate(&webViewHelper, 0, -13);
+    CompareUnusedDeltaAndAccumulatedRootOverscroll(&webViewHelper, 0, 13, 0, 13);
+}
+
+TEST_F(WebFrameOverscrollTest, RootLayerOverscrolledOnInnerDivOverScroll)
+{
+    FakeCompositingWebViewClient client;
+    registerMockedHttpURLLoad("mainthread-inner-div-overscroll.html");
+    FrameTestHelpers::WebViewHelper webViewHelper;
+    WebViewImpl* webViewImpl = webViewHelper.initializeAndLoad(m_baseURL + "mainthread-inner-div-overscroll.html", true, 0, &client, configureAndroid);
+    webViewImpl->layout();
+
+    ScrollBegin(&webViewHelper);
+
+    ScrollUpdate(&webViewHelper, 0, 13);
+    CompareUnusedDeltaAndAccumulatedRootOverscroll(&webViewHelper, 0, -13, 0, -13);
+
+    ScrollUpdate(&webViewHelper, 0, 13);
+    CompareUnusedDeltaAndAccumulatedRootOverscroll(&webViewHelper, 0, -13, 0, -26);
+
+    ScrollUpdate(&webViewHelper, 13, 13);
+    CompareUnusedDeltaAndAccumulatedRootOverscroll(&webViewHelper, -13, -13, -13, -39);
+
+    ScrollUpdate(&webViewHelper, 13, 0);
+    CompareUnusedDeltaAndAccumulatedRootOverscroll(&webViewHelper, -13, 0, -26, -39);
+
+    ScrollEnd(&webViewHelper);
+    CompareUnusedDeltaAndAccumulatedRootOverscroll(&webViewHelper, 0, 0, 0, 0);
+}
+
+TEST_F(WebFrameOverscrollTest, RootLayerOverscrolledOnInnerIFrameOverScroll)
+{
+    FakeCompositingWebViewClient client;
+    registerMockedHttpURLLoad("mainthread-inner-iframe-overscroll.html");
+    FrameTestHelpers::WebViewHelper webViewHelper;
+    WebViewImpl* webViewImpl = webViewHelper.initializeAndLoad(m_baseURL + "mainthread-inner-iframe-overscroll.html", true, 0, &client, configureAndroid);
+    webViewImpl->layout();
+
+    ScrollBegin(&webViewHelper);
+
+    ScrollUpdate(&webViewHelper, 0, 13);
+    CompareUnusedDeltaAndAccumulatedRootOverscroll(&webViewHelper, 0, -13, 0, -13);
+
+    ScrollUpdate(&webViewHelper, 0, 13);
+    CompareUnusedDeltaAndAccumulatedRootOverscroll(&webViewHelper, 0, -13, 0, -26);
+
+    ScrollUpdate(&webViewHelper, 13, 13);
+    CompareUnusedDeltaAndAccumulatedRootOverscroll(&webViewHelper, -13, -13, -13, -39);
+
+    ScrollUpdate(&webViewHelper, 13, 0);
+    CompareUnusedDeltaAndAccumulatedRootOverscroll(&webViewHelper, -13, 0, -26, -39);
+
+    ScrollEnd(&webViewHelper);
+    CompareUnusedDeltaAndAccumulatedRootOverscroll(&webViewHelper, 0, 0, 0, 0);
+}
+
 } // namespace blink