add test

GIGA/Modules/Mask/Exercises/Model/QustionAnswer.m

@@ -0,0 +1,24 @@
+//
+//  QustionAnswer.m
+//  GIGA
+//
+//  Created by lianxiang on 2018/9/12.
+//  Copyright © 2018年 com.giga.ios. All rights reserved.
+//
+
+#import "QustionAnswer.h"
+
+@implementation QustionAnswer
+
++(JSONKeyMapper *)keyMapper{
+    
+    return [[JSONKeyMapper alloc] initWithModelToJSONDictionary:@{@"answer_id":@"id"}];
+    
+}
+
++ (BOOL)propertyIsOptional:(NSString *)propertyName{
+    
+    return YES;
+}
+
+@end