diff -r 000000000000 -r 6474c204b198 mobile/android/tests/background/junit3/src/sync/helpers/ExpectGuidsSinceDelegate.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mobile/android/tests/background/junit3/src/sync/helpers/ExpectGuidsSinceDelegate.java	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,41 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+package org.mozilla.gecko.background.sync.helpers;
+
+import static junit.framework.Assert.assertEquals;
+import static junit.framework.Assert.assertFalse;
+
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Set;
+
+import junit.framework.AssertionFailedError;
+
+public class ExpectGuidsSinceDelegate extends DefaultGuidsSinceDelegate {
+  private String[] expected;
+  public Set<String> ignore = new HashSet<String>();
+
+  public ExpectGuidsSinceDelegate(String[] guids) {
+    expected = guids;
+    Arrays.sort(expected);
+  }
+
+  @Override
+  public void onGuidsSinceSucceeded(String[] guids) {
+    AssertionFailedError err = null;
+    try {
+      int notIgnored = 0;
+      for (String guid : guids) {
+        if (!ignore.contains(guid)) {
+          notIgnored++;
+          assertFalse(-1 == Arrays.binarySearch(this.expected, guid));
+        }
+      }
+      assertEquals(this.expected.length, notIgnored);
+    } catch (AssertionFailedError e) {
+      err = e;
+    }
+    performNotify(err);
+  }
+}