Test reproducing delay on a network request

We mock fail the network request to reproduce the issue where the app
does not get foregrounded.

Author: jkasten2

OneSignalSDK/unittest/src/test/java/com/test/onesignal/MainOneSignalClassRunner.java

@@ -1077,6 +1077,25 @@ public void testOpeningLauncherActivity() throws Exception {
       assertNull(shadowOf(blankActivity).getNextStartedActivity());
    }
 
+   @Test
+   public void testOpeningLauncherActivityWhenOffline() throws Exception {
+      ShadowOneSignalRestClient.failGetParams = true;
+      AddLauncherIntentFilter();
+
+      OneSignalInit();
+      // This removes Activity from the unit test's state
+      assertNotNull(shadowOf(blankActivity).getNextStartedActivity());
+
+      // Background the app
+      blankActivityController.pause();
+
+      // Open a notification
+      OneSignal_handleNotificationOpen(blankActivity, new JSONArray("[{ \"alert\": \"Test Msg\", \"custom\": { \"i\": \"UUID\" } }]"), ONESIGNAL_NOTIFICATION_ID);
+
+      // Ensure the app is foregrounded
+      assertNotNull(shadowOf(blankActivity).getNextStartedActivity());
+   }
+
    @Test
    public void testOpeningLaunchUrl() throws Exception {
       // First init run for appId to be saved