TEST(RemoteFrameThrottlingTest, ThrottledLocalRoot)
{
    FrameTestHelpers::TestWebViewClient viewClient;
    WebViewImpl* webView = WebViewImpl::create(&viewClient);
    webView->resize(WebSize(640, 480));

    // Create a remote root frame with a local child frame.
    FrameTestHelpers::TestWebRemoteFrameClient remoteClient;
    webView->setMainFrame(remoteClient.frame());
    remoteClient.frame()->setReplicatedOrigin(WebSecurityOrigin::createUnique());

    WebFrameOwnerProperties properties;
    WebRemoteFrame* rootFrame = webView->mainFrame()->toWebRemoteFrame();
    WebLocalFrame* localFrame = FrameTestHelpers::createLocalChild(rootFrame);

    WebString baseURL("http://internal.test/");
    URLTestHelpers::registerMockedURLFromBaseURL(baseURL, "simple_div.html");
    FrameTestHelpers::loadFrame(localFrame, baseURL.utf8() + "simple_div.html");

    FrameView* frameView = toWebLocalFrameImpl(localFrame)->frameView();
    EXPECT_TRUE(frameView->frame().isLocalRoot());

    // Enable throttling for the child frame.
    frameView->setFrameRect(IntRect(0, 480, frameView->width(), frameView->height()));
    frameView->frame().securityContext()->setSecurityOrigin(SecurityOrigin::createUnique());
    frameView->updateAllLifecyclePhases();
    testing::runPendingTasks();
    EXPECT_TRUE(frameView->canThrottleRendering());

    Document* frameDocument = frameView->frame().document();
    EXPECT_EQ(DocumentLifecycle::PaintClean, frameDocument->lifecycle().state());

    // Mutate the local child frame contents.
    auto* divElement = frameDocument->getElementById("div");
    divElement->setAttribute(styleAttr, "width: 50px");
    EXPECT_EQ(DocumentLifecycle::VisualUpdatePending, frameDocument->lifecycle().state());

    // Update the lifecycle again. The frame's lifecycle should not advance
    // because of throttling even though it is the local root.
    DocumentLifecycle::AllowThrottlingScope throttlingScope(frameDocument->lifecycle());
    frameView->updateAllLifecyclePhases();
    testing::runPendingTasks();
    EXPECT_EQ(DocumentLifecycle::VisualUpdatePending, frameDocument->lifecycle().state());
    webView->close();
}