1 files changed, 49 insertions, 0 deletions
diff --git a/dom/manifest/test/browser_fire_appinstalled_event.js b/dom/manifest/test/browser_fire_appinstalled_event.js
new file mode 100644
index 000000000..517b120d3
--- /dev/null
+++ b/dom/manifest/test/browser_fire_appinstalled_event.js
@@ -0,0 +1,49 @@
+//Used by JSHint:
+/*global Cu, BrowserTestUtils, ok, add_task, gBrowser */
+"use strict";
+const { PromiseMessage } = Cu.import("resource://gre/modules/PromiseMessage.jsm", {});
+const testPath = "/browser/dom/manifest/test/file_reg_appinstalled_event.html";
+const defaultURL = new URL("http://example.org/browser/dom/manifest/test/file_testserver.sjs");
+const testURL = new URL(defaultURL);
+testURL.searchParams.append("file", testPath);
+
+// Enable window.onappinstalled, so we can fire events at it.
+function enableOnAppInstalledPref() {
+  const ops = {
+    "set": [
+      ["dom.manifest.onappinstalled", true],
+    ],
+  };
+  return SpecialPowers.pushPrefEnv(ops);
+}
+
+// Send a message for the even to be fired.
+// This cause file_reg_install_event.html to be dynamically change.
+function* theTest(aBrowser) {
+  aBrowser.allowEvents = true;
+  let waitForInstall = ContentTask.spawn(aBrowser, null, function*() {
+    yield ContentTaskUtils.waitForEvent(content.window, "appinstalled");
+  });
+  const { data: { success } } = yield PromiseMessage
+    .send(aBrowser.messageManager, "DOM:Manifest:FireAppInstalledEvent");
+  ok(success, "message sent and received successfully.");
+  try {
+    yield waitForInstall;
+    ok(true, "AppInstalled event fired");
+  } catch (err) {
+    ok(false, "AppInstalled event didn't fire: " + err.message);
+  }
+}
+
+// Open a tab and run the test
+add_task(function*() {
+  yield enableOnAppInstalledPref();
+  let tabOptions = {
+    gBrowser: gBrowser,
+    url: testURL.href,
+  };
+  yield BrowserTestUtils.withNewTab(
+    tabOptions,
+    theTest
+  );
+});