1 files changed, 120 insertions, 0 deletions
diff --git a/gfx/layers/apz/test/mochitest/browser_test_autoscrolling_in_oop_frame.js b/gfx/layers/apz/test/mochitest/browser_test_autoscrolling_in_oop_frame.js
new file mode 100644
index 0000000000..26d0ff6109
--- /dev/null
+++ b/gfx/layers/apz/test/mochitest/browser_test_autoscrolling_in_oop_frame.js
@@ -0,0 +1,120 @@
+/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set sts=2 sw=2 et tw=80: */
+"use strict";
+
+Services.scriptloader.loadSubScript(
+  "chrome://mochitests/content/browser/gfx/layers/apz/test/mochitest/apz_test_utils.js",
+  this
+);
+
+Services.scriptloader.loadSubScript(
+  "chrome://mochitests/content/browser/gfx/layers/apz/test/mochitest/apz_test_native_event_utils.js",
+  this
+);
+
+add_setup(async function () {
+  await SpecialPowers.pushPrefEnv({
+    set: [
+      ["general.autoScroll", true],
+      ["middlemouse.contentLoadURL", false],
+      ["test.events.async.enabled", true],
+    ],
+  });
+});
+
+async function doTest() {
+  function httpURL(filename) {
+    const chromeURL = getRootDirectory(gTestPath) + filename;
+    return chromeURL.replace(
+      "chrome://mochitests/content/",
+      "http://mochi.test:8888/"
+    );
+  }
+
+  function getScrollY(context) {
+    return SpecialPowers.spawn(context, [], () => content.scrollY);
+  }
+
+  const pageUrl = httpURL("helper_test_autoscrolling_in_oop_frame.html");
+
+  await BrowserTestUtils.withNewTab(pageUrl, async function (browser) {
+    await promiseApzFlushedRepaintsInPopup(browser);
+
+    const iframeContext = browser.browsingContext.children[0];
+    await promiseApzFlushedRepaintsInPopup(iframeContext);
+
+    const { screenX, screenY, viewId, presShellId } = await SpecialPowers.spawn(
+      iframeContext,
+      [],
+      () => {
+        const winUtils = SpecialPowers.getDOMWindowUtils(content);
+        return {
+          screenX: content.mozInnerScreenX * content.devicePixelRatio,
+          screenY: content.mozInnerScreenY * content.devicePixelRatio,
+          viewId: winUtils.getViewId(content.document.documentElement),
+          presShellId: winUtils.getPresShellId(),
+        };
+      }
+    );
+
+    ok(
+      iframeContext.startApzAutoscroll(
+        screenX + 100,
+        screenY + 50,
+        viewId,
+        presShellId
+      ),
+      "Started autscroll"
+    );
+
+    const scrollEventPromise = SpecialPowers.spawn(
+      iframeContext,
+      [],
+      async () => {
+        return new Promise(resolve => {
+          content.addEventListener(
+            "scroll",
+            event => {
+              dump("Got a scroll event in the iframe\n");
+              resolve();
+            },
+            { once: true }
+          );
+        });
+      }
+    );
+
+    // Send sequential mousemove events to cause autoscrolling.
+    for (let i = 0; i < 10; i++) {
+      await promiseNativeMouseEventWithAPZ({
+        type: "mousemove",
+        target: browser,
+        offsetX: 100,
+        offsetY: 50 + i * 10,
+      });
+    }
+
+    // Flush APZ repaints and waits for MozAfterPaint to make sure the scroll has
+    // been reflected on the main thread.
+    const apzPromise = promiseApzFlushedRepaintsInPopup(browser);
+
+    await Promise.all([apzPromise, scrollEventPromise]);
+
+    const frameScrollY = await getScrollY(iframeContext);
+    ok(frameScrollY > 0, "Autoscrolled the iframe");
+
+    const rootScrollY = await getScrollY(browser);
+    ok(rootScrollY == 0, "Didn't scroll the root document");
+
+    iframeContext.stopApzAutoscroll(viewId, presShellId);
+  });
+}
+
+add_task(async function test_autoscroll_in_oop_iframe() {
+  await doTest();
+});
+
+add_task(async function test_autoscroll_in_oop_iframe_with_os_zoom() {
+  await SpecialPowers.pushPrefEnv({ set: [["ui.textScaleFactor", 200]] });
+  await doTest();
+});