1 files changed, 65 insertions, 0 deletions
diff --git a/mobile/android/modules/geckoview/GeckoViewTestUtils.jsm b/mobile/android/modules/geckoview/GeckoViewTestUtils.jsm
new file mode 100644
index 0000000000..966eae2d90
--- /dev/null
+++ b/mobile/android/modules/geckoview/GeckoViewTestUtils.jsm
@@ -0,0 +1,65 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+"use strict";
+
+var EXPORTED_SYMBOLS = ["GeckoViewTabUtil"];
+
+const lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  EventDispatcher: "resource://gre/modules/Messaging.sys.mjs",
+});
+
+const GeckoViewTabUtil = {
+  /**
+   * Creates a new tab through service worker delegate.
+   * Needs to be ran in a parent process.
+   *
+   * @param {string} url
+   * @returns {Tab}
+   * @throws {Error} Throws an error if the tab cannot be created.
+   */
+  async createNewTab(url = "about:blank") {
+    let sessionId = "";
+    const windowPromise = new Promise(resolve => {
+      const openingObserver = (subject, topic, data) => {
+        if (subject.name === sessionId) {
+          Services.obs.removeObserver(
+            openingObserver,
+            "geckoview-window-created"
+          );
+          resolve(subject);
+        }
+      };
+      Services.obs.addObserver(openingObserver, "geckoview-window-created");
+    });
+
+    try {
+      sessionId = await lazy.EventDispatcher.instance.sendRequestForResult({
+        type: "GeckoView:Test:NewTab",
+        url,
+      });
+    } catch (errorMessage) {
+      throw new Error(
+        errorMessage + " GeckoView:Test:NewTab is not supported."
+      );
+    }
+
+    if (!sessionId) {
+      throw new Error("Could not open a session for the new tab.");
+    }
+
+    const window = await windowPromise;
+
+    // Immediately load the URI in the browser after creating the new tab to
+    // load into. This isn't done from the Java side to align with the
+    // ServiceWorkerOpenWindow infrastructure which this is built on top of.
+    window.browser.fixupAndLoadURIString(url, {
+      flags: Ci.nsIWebNavigation.LOAD_FLAGS_NONE,
+      triggeringPrincipal: Services.scriptSecurityManager.getSystemPrincipal(),
+    });
+
+    return window.tab;
+  },
+};