1 files changed, 116 insertions, 0 deletions
diff --git a/browser/components/preferences/tests/browser_bug1184989_prevent_scrolling_when_preferences_flipped.js b/browser/components/preferences/tests/browser_bug1184989_prevent_scrolling_when_preferences_flipped.js
new file mode 100644
index 0000000000..ef387f9a9d
--- /dev/null
+++ b/browser/components/preferences/tests/browser_bug1184989_prevent_scrolling_when_preferences_flipped.js
@@ -0,0 +1,116 @@
+const triggeringPrincipal_base64 = E10SUtils.SERIALIZED_SYSTEMPRINCIPAL;
+
+add_task(async function () {
+  waitForExplicitFinish();
+
+  const tabURL =
+    getRootDirectory(gTestPath) +
+    "browser_bug1184989_prevent_scrolling_when_preferences_flipped.xhtml";
+
+  await BrowserTestUtils.withNewTab(
+    { gBrowser, url: tabURL },
+    async function (browser) {
+      let doc = browser.contentDocument;
+      let container = doc.getElementById("container");
+
+      // Test button
+      let button = doc.getElementById("button");
+      button.focus();
+      let initialScrollTop = container.scrollTop;
+      EventUtils.sendString(" ");
+      await checkPageScrolling(container, "button", initialScrollTop);
+
+      // Test checkbox
+      let checkbox = doc.getElementById("checkbox");
+      checkbox.focus();
+      initialScrollTop = container.scrollTop;
+      EventUtils.sendString(" ");
+      ok(checkbox.checked, "Checkbox is checked");
+      await checkPageScrolling(container, "checkbox", initialScrollTop);
+
+      // Test radio
+      let radiogroup = doc.getElementById("radiogroup");
+      radiogroup.focus();
+      initialScrollTop = container.scrollTop;
+      EventUtils.sendString(" ");
+      await checkPageScrolling(container, "radio", initialScrollTop);
+    }
+  );
+
+  await BrowserTestUtils.withNewTab(
+    { gBrowser, url: "about:preferences#search" },
+    async function (browser) {
+      let doc = browser.contentDocument;
+      let container = doc.getElementsByClassName("main-content")[0];
+
+      // Test search
+      let engineList = doc.getElementById("engineList");
+      engineList.focus();
+      let initialScrollTop = container.scrollTop;
+      EventUtils.sendString(" ");
+      is(
+        engineList.view.selection.currentIndex,
+        0,
+        "Search engineList is selected"
+      );
+      EventUtils.sendString(" ");
+      await checkPageScrolling(
+        container,
+        "search engineList",
+        initialScrollTop
+      );
+    }
+  );
+
+  // Test session restore
+  const CRASH_URL = "about:mozilla";
+  const CRASH_FAVICON = "chrome://branding/content/icon32.png";
+  const CRASH_SHENTRY = { url: CRASH_URL };
+  const CRASH_TAB = { entries: [CRASH_SHENTRY], image: CRASH_FAVICON };
+  const CRASH_STATE = { windows: [{ tabs: [CRASH_TAB] }] };
+
+  const TAB_URL = "about:sessionrestore";
+  const TAB_FORMDATA = { url: TAB_URL, id: { sessionData: CRASH_STATE } };
+  const TAB_SHENTRY = { url: TAB_URL, triggeringPrincipal_base64 };
+  const TAB_STATE = { entries: [TAB_SHENTRY], formdata: TAB_FORMDATA };
+
+  let tab = (gBrowser.selectedTab = BrowserTestUtils.addTab(
+    gBrowser,
+    "about:blank"
+  ));
+
+  // Fake a post-crash tab
+  SessionStore.setTabState(tab, JSON.stringify(TAB_STATE));
+
+  await BrowserTestUtils.browserLoaded(tab.linkedBrowser);
+  let doc = tab.linkedBrowser.contentDocument;
+
+  // Make body scrollable
+  doc.body.style.height = doc.body.clientHeight + 100 + "px";
+
+  let tabsToggle = doc.getElementById("tabsToggle");
+  tabsToggle.focus();
+  let initialScrollTop = doc.documentElement.scrollTop;
+  EventUtils.sendString(" ");
+  await checkPageScrolling(
+    doc.documentElement,
+    "session restore",
+    initialScrollTop
+  );
+
+  gBrowser.removeCurrentTab();
+  finish();
+});
+
+function checkPageScrolling(container, type, initialScrollTop = 0) {
+  return new Promise(resolve => {
+    setTimeout(() => {
+      is(
+        container.scrollTop,
+        initialScrollTop,
+        "Page should not scroll when " + type + " flipped"
+      );
+      resolve();
+    }, 0);
+  });
+}