1 files changed, 141 insertions, 0 deletions
diff --git a/dom/plugins/test/mochitest/browser_tabswitchbetweenplugins.js b/dom/plugins/test/mochitest/browser_tabswitchbetweenplugins.js
new file mode 100644
index 0000000000..c6b7e10796
--- /dev/null
+++ b/dom/plugins/test/mochitest/browser_tabswitchbetweenplugins.js
@@ -0,0 +1,141 @@
+var gTestRoot = getRootDirectory(gTestPath).replace(
+  "chrome://mochitests/content/",
+  "http://127.0.0.1:8888/"
+);
+
+function waitForPluginVisibility(browser, shouldBeVisible, errorMessage) {
+  return new Promise((resolve, reject) => {
+    let windowUtils = window.windowUtils;
+    let lastTransactionId = windowUtils.lastTransactionId;
+    let listener = async event => {
+      let visibility = await SpecialPowers.spawn(browser, [], async function() {
+        let doc = content.document;
+        let plugin = doc.getElementById("testplugin");
+        return XPCNativeWrapper.unwrap(plugin).nativeWidgetIsVisible();
+      });
+
+      if (visibility == shouldBeVisible) {
+        window.removeEventListener("MozAfterPaint", listener);
+        resolve();
+      } else if (event && event.transactionId > lastTransactionId) {
+        // We want to allow for one failed check since we call listener
+        // directly, but if we get a MozAfterPaint notification and we
+        // still don't have the correct visibility, that's likely a
+        // problem.
+        reject(new Error("MozAfterPaint had a mismatched plugin visibility"));
+      }
+    };
+    window.addEventListener("MozAfterPaint", listener);
+    listener(null);
+  });
+}
+
+// tests that we get plugin updates when we flip between tabs that
+// have the same plugin in the same position in the page.
+
+add_task(async function() {
+  let result, tabSwitchedPromise;
+
+  setTestPluginEnabledState(Ci.nsIPluginTag.STATE_ENABLED, "Test Plug-in");
+
+  let testTab = gBrowser.selectedTab;
+  let pluginTab1 = await BrowserTestUtils.openNewForegroundTab(
+    gBrowser,
+    gTestRoot + "plugin_test.html"
+  );
+  let pluginTab2 = await BrowserTestUtils.openNewForegroundTab(
+    gBrowser,
+    gTestRoot + "plugin_test.html"
+  );
+
+  result = await SpecialPowers.spawn(
+    pluginTab1.linkedBrowser,
+    [],
+    async function() {
+      let doc = content.document;
+      let plugin = doc.getElementById("testplugin");
+      return !!plugin;
+    }
+  );
+  is(result, true, "plugin1 is loaded");
+
+  result = await SpecialPowers.spawn(
+    pluginTab2.linkedBrowser,
+    [],
+    async function() {
+      let doc = content.document;
+      let plugin = doc.getElementById("testplugin");
+      return !!plugin;
+    }
+  );
+  is(result, true, "plugin2 is loaded");
+
+  // plugin tab 2 should be selected
+  is(gBrowser.selectedTab == pluginTab2, true, "plugin2 is selected");
+
+  await waitForPluginVisibility(
+    pluginTab1.linkedBrowser,
+    false,
+    "plugin1 should be hidden"
+  );
+
+  await waitForPluginVisibility(
+    pluginTab2.linkedBrowser,
+    true,
+    "plugin2 should be visible"
+  );
+
+  // select plugin1 tab
+  tabSwitchedPromise = waitTabSwitched();
+  gBrowser.selectedTab = pluginTab1;
+  await tabSwitchedPromise;
+
+  await waitForPluginVisibility(
+    pluginTab1.linkedBrowser,
+    true,
+    "plugin1 should be visible"
+  );
+
+  await waitForPluginVisibility(
+    pluginTab2.linkedBrowser,
+    false,
+    "plugin2 should be hidden"
+  );
+
+  // select plugin2 tab
+  tabSwitchedPromise = waitTabSwitched();
+  gBrowser.selectedTab = pluginTab2;
+  await tabSwitchedPromise;
+
+  await waitForPluginVisibility(
+    pluginTab1.linkedBrowser,
+    false,
+    "plugin1 should be hidden"
+  );
+
+  await waitForPluginVisibility(
+    pluginTab2.linkedBrowser,
+    true,
+    "plugin2 should be visible"
+  );
+
+  // select test tab
+  tabSwitchedPromise = waitTabSwitched();
+  gBrowser.selectedTab = testTab;
+  await tabSwitchedPromise;
+
+  await waitForPluginVisibility(
+    pluginTab1.linkedBrowser,
+    false,
+    "plugin1 should be hidden"
+  );
+
+  await waitForPluginVisibility(
+    pluginTab2.linkedBrowser,
+    false,
+    "plugin2 should be hidden"
+  );
+
+  gBrowser.removeTab(pluginTab1);
+  gBrowser.removeTab(pluginTab2);
+});