Bug 948465 - Part 2: Tests. r=mfinkle

mobile/android/base/tests/robocop.ini

@@ -105,6 +105,7 @@ skip-if = android_version == "10"
 [testJNI]
 # [testMozPay] # see bug 945675
 [testOrderedBroadcast]
+[testResourceSubstitutions]
 [testSharedPreferences]
 [testSimpleDiscovery]
 [testUITelemetry]

mobile/android/base/tests/testResourceSubstitutions.java

@@ -0,0 +1,9 @@
+package org.mozilla.gecko.tests;
+
+
+
+public class testResourceSubstitutions extends JavascriptTest {
+    public testResourceSubstitutions() {
+        super("testResourceSubstitutions.js");
+    }
+}

mobile/android/base/tests/testResourceSubstitutions.js

@@ -0,0 +1,47 @@
+// -*- indent-tabs-mode: nil; js-indent-level: 2 -*-
+/* 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/. */
+
+const { classes: Cc, interfaces: Ci, utils: Cu } = Components;
+
+Cu.import("resource://gre/modules/Promise.jsm"); /*global Promise */
+Cu.import("resource://gre/modules/Services.jsm"); /*global Services */
+Cu.import("resource://gre/modules/NetUtil.jsm"); /*global NetUtil */
+
+function readChannel(url) {
+  let deferred = Promise.defer();
+
+  let channel = NetUtil.newChannel(url);
+  channel.contentType = "text/plain";
+
+  NetUtil.asyncFetch(channel, function(inputStream, status) {
+    if (!Components.isSuccessCode(status)) {
+      deferred.reject();
+      return;
+    }
+
+    let content = NetUtil.readInputStreamToString(inputStream, inputStream.available());
+    deferred.resolve(content);
+  });
+
+  return deferred.promise;
+}
+
+add_task(function test_Android() {
+    let protocolHandler = Services.io
+       .getProtocolHandler("resource")
+       .QueryInterface(Ci.nsIResProtocolHandler);
+
+    do_check_true(protocolHandler.hasSubstitution("android"));
+
+    // This can be any file that we know exists in the root of every APK.
+    let packageName = yield readChannel("resource://android/package-name.txt");
+
+    // It's difficult to fish ANDROID_PACKAGE_NAME from JavaScript, so we test the
+    // following weaker condition.
+    let expectedPrefix = "org.mozilla.";
+    do_check_eq(packageName.substring(0, expectedPrefix.length), expectedPrefix);
+});
+
+run_next_test();