TopBar testId

lib/android/app/src/main/java/com/reactnativenavigation/parse/TopBarOptions.java

     public ArrayList<Button> rightButtons;
 
     void mergeWith(final TopBarOptions other) {
+        if (other.testId.hasValue()) {
+            testId = other.testId;
+        }
         if (other.title.hasValue())
             title = other.title;
         if (other.backgroundColor.hasValue())
             leftButtons = defaultOptions.leftButtons;
         if (rightButtons == null)
             rightButtons = defaultOptions.rightButtons;
+        if (!testId.hasValue()) {
+            testId = defaultOptions.testId;
+        }
     }
 }

lib/android/app/src/main/java/com/reactnativenavigation/views/TopBar.java

 import com.reactnativenavigation.anim.TopBarAnimator;
 import com.reactnativenavigation.anim.TopBarCollapseBehavior;
 import com.reactnativenavigation.interfaces.ScrollEventListener;
+import com.reactnativenavigation.parse.params.Bool;
 import com.reactnativenavigation.parse.params.Button;
 import com.reactnativenavigation.parse.params.Color;
 import com.reactnativenavigation.parse.params.Fraction;
 import com.reactnativenavigation.parse.params.Number;
-import com.reactnativenavigation.parse.params.Bool;
 
 import java.util.ArrayList;
 
         this.animator = new TopBarAnimator(this);
         this.parentView = parentView;
         addView(titleBar);
+        titleBar.setContentDescription("titleBar");
+        setContentDescription("TopBar");
     }
 
     public void setTitle(String title) {