1 files changed, 81 insertions, 0 deletions
diff --git a/testing/mochitest/BrowserTestUtils/content/content-about-page-utils.js b/testing/mochitest/BrowserTestUtils/content/content-about-page-utils.js
new file mode 100644
index 0000000000..e20100db4b
--- /dev/null
+++ b/testing/mochitest/BrowserTestUtils/content/content-about-page-utils.js
@@ -0,0 +1,81 @@
+/* eslint-env mozilla/process-script */
+
+"use strict";
+
+var Cm = Components.manager;
+
+function AboutPage(aboutHost, chromeURL, uriFlags) {
+  this.chromeURL = chromeURL;
+  this.aboutHost = aboutHost;
+  this.classID = Components.ID(Services.uuid.generateUUID().number);
+  this.description = "BrowserTestUtils: " + aboutHost;
+  this.uriFlags = uriFlags;
+}
+
+AboutPage.prototype = {
+  QueryInterface: ChromeUtils.generateQI(["nsIAboutModule"]),
+  getURIFlags(aURI) {
+    // eslint-disable-line no-unused-vars
+    return this.uriFlags;
+  },
+
+  newChannel(aURI, aLoadInfo) {
+    let newURI = Services.io.newURI(this.chromeURL);
+    let channel = Services.io.newChannelFromURIWithLoadInfo(newURI, aLoadInfo);
+    channel.originalURI = aURI;
+
+    if (this.uriFlags & Ci.nsIAboutModule.URI_SAFE_FOR_UNTRUSTED_CONTENT) {
+      channel.owner = null;
+    }
+    return channel;
+  },
+
+  createInstance(iid) {
+    return this.QueryInterface(iid);
+  },
+
+  register() {
+    Cm.QueryInterface(Ci.nsIComponentRegistrar).registerFactory(
+      this.classID,
+      this.description,
+      "@mozilla.org/network/protocol/about;1?what=" + this.aboutHost,
+      this
+    );
+  },
+
+  unregister() {
+    Cm.QueryInterface(Ci.nsIComponentRegistrar).unregisterFactory(
+      this.classID,
+      this
+    );
+  },
+};
+
+const gRegisteredPages = new Map();
+
+addMessageListener("browser-test-utils:about-registration:register", msg => {
+  let { aboutModule, pageURI, flags } = msg.data;
+  if (gRegisteredPages.has(aboutModule)) {
+    gRegisteredPages.get(aboutModule).unregister();
+  }
+  let moduleObj = new AboutPage(aboutModule, pageURI, flags);
+  moduleObj.register();
+  gRegisteredPages.set(aboutModule, moduleObj);
+  sendAsyncMessage(
+    "browser-test-utils:about-registration:registered",
+    aboutModule
+  );
+});
+
+addMessageListener("browser-test-utils:about-registration:unregister", msg => {
+  let aboutModule = msg.data;
+  let moduleObj = gRegisteredPages.get(aboutModule);
+  if (moduleObj) {
+    moduleObj.unregister();
+    gRegisteredPages.delete(aboutModule);
+  }
+  sendAsyncMessage(
+    "browser-test-utils:about-registration:unregistered",
+    aboutModule
+  );
+});