1 files changed, 54 insertions, 1 deletions
diff --git a/tests/common/src/com/android/tv/testing/Utils.java b/tests/common/src/com/android/tv/testing/Utils.java
index 33fe4c54..c1a7506f 100644
--- a/tests/common/src/com/android/tv/testing/Utils.java
+++ b/tests/common/src/com/android/tv/testing/Utils.java
@@ -25,11 +25,21 @@ import android.media.tv.TvContentRating;
 import android.media.tv.TvInputInfo;
 import android.media.tv.TvInputManager;
 import android.net.Uri;
+import android.os.Looper;
 import android.text.TextUtils;
+import android.util.Log;
+
+import com.android.tv.util.MainThreadExecutor;
 
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.Locale;
+import java.util.Random;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.Future;
 
 /**
  * An utility class for testing.
@@ -38,7 +48,11 @@ import java.io.OutputStream;
  *
  * @see com.android.tv.util.Utils#isRunningInTest
  */
-public class Utils {
+public final class Utils {
+    private static final String TAG ="Utils";
+
+    private static final long DEFAULT_RANDOM_SEED = getSeed();
+
     public static String getUriStringForResource(Context context, int resId) {
         if (resId == 0) {
             return "";
@@ -105,5 +119,44 @@ public class Utils {
         return ratings.toString();
     }
 
+    /**
+     * Return the Random class which is needed to make random data for testing.
+     * Default seed of the random is today's date.
+     */
+    public static Random createTestRandom() {
+        return new Random(DEFAULT_RANDOM_SEED);
+    }
+
+    /**
+     * Executes a call on the main thread, blocking until it is completed.
+     *
+     * <p>Useful for doing things that are not thread-safe, such as looking at or modifying the view
+     * hierarchy.
+     *
+     * @param runnable The code to run on the main thread.
+     */
+    public static void runOnMainSync(Runnable runnable) {
+        if (Looper.myLooper() == Looper.getMainLooper()) {
+            runnable.run();
+        } else {
+            Future<?> temp = MainThreadExecutor.getInstance().submit(runnable);
+            try {
+                temp.get();
+            } catch (InterruptedException e) {
+                throw new RuntimeException(e);
+            } catch (ExecutionException e) {
+                throw new RuntimeException(e);
+            }
+        }
+    }
+
+    private static long getSeed() {
+        // Set random seed as the date to track failed test data easily.
+        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMdd", Locale.getDefault());
+        String today = dateFormat.format(new Date());
+        Log.d(TAG, "Today's random seed is " + today);
+        return Long.valueOf(today);
+    }
+
     private Utils() {}
 }