[ReactNative] Add AppEventsTest

Libraries/RCTTest/RCTTestModule.m

@@ -11,6 +11,7 @@
 
 #import "FBSnapshotTestController.h"
 #import "RCTAssert.h"
+#import "RCTEventDispatcher.h"
 #import "RCTLog.h"
 #import "RCTUIManager.h"
 
@@ -63,4 +64,9 @@ RCT_EXPORT_METHOD(markTestCompleted)
   }];
 }
 
+RCT_EXPORT_METHOD(sendAppEvent:(NSString *)name body:(id)body)
+{
+  [_bridge.eventDispatcher sendAppEventWithName:name body:body];
+}
+
 @end