1 files changed, 72 insertions, 0 deletions
diff --git a/toolkit/components/extensions/test/browser/browser_ext_webNavigation_eventpage.js b/toolkit/components/extensions/test/browser/browser_ext_webNavigation_eventpage.js
new file mode 100644
index 0000000000..d898cb96a4
--- /dev/null
+++ b/toolkit/components/extensions/test/browser/browser_ext_webNavigation_eventpage.js
@@ -0,0 +1,72 @@
+"use strict";
+
+add_task(async function webnav_test_eventpage() {
+  await SpecialPowers.pushPrefEnv({
+    set: [["extensions.eventPages.enabled", true]],
+  });
+
+  let extension = ExtensionTestUtils.loadExtension({
+    manifest: {
+      permissions: ["webNavigation", "*://mochi.test/*"],
+      background: { persistent: false },
+    },
+    background() {
+      const EVENTS = [
+        "onTabReplaced",
+        "onBeforeNavigate",
+        "onCommitted",
+        "onDOMContentLoaded",
+        "onCompleted",
+        "onErrorOccurred",
+        "onReferenceFragmentUpdated",
+        "onHistoryStateUpdated",
+      ];
+
+      for (let event of EVENTS) {
+        browser.webNavigation[event].addListener(() => {});
+      }
+      browser.test.sendMessage("ready");
+    },
+  });
+
+  // onTabReplaced is never persisted, it is an empty event handler.
+  const EVENTS = [
+    "onBeforeNavigate",
+    "onCommitted",
+    "onDOMContentLoaded",
+    "onCompleted",
+    "onErrorOccurred",
+    "onReferenceFragmentUpdated",
+    "onHistoryStateUpdated",
+  ];
+
+  await extension.startup();
+  await extension.awaitMessage("ready");
+  for (let event of EVENTS) {
+    assertPersistentListeners(extension, "webNavigation", event, {
+      primed: false,
+    });
+  }
+
+  await extension.terminateBackground();
+  for (let event of EVENTS) {
+    assertPersistentListeners(extension, "webNavigation", event, {
+      primed: true,
+    });
+  }
+
+  // wake up the background, we don't really care which event does it,
+  // we're just verifying the state after.
+  let newWin = await BrowserTestUtils.openNewBrowserWindow();
+  await extension.awaitMessage("ready");
+  for (let event of EVENTS) {
+    assertPersistentListeners(extension, "webNavigation", event, {
+      primed: false,
+    });
+  }
+
+  await BrowserTestUtils.closeWindow(newWin);
+
+  await extension.unload();
+  await SpecialPowers.popPrefEnv();
+});