增加Result自定义序列化逻辑

uni_modules/uts-tests/utssdk/tests.uts

@@ -2,10 +2,19 @@ import { Matchers,NumberMatchers } from './Matchers.uts'
 
 export const describes = new Map<string, Result>()
 
-export class Result {
+export class Result implements io.dcloud.uts.json.IJsonStringify {
     total = 0
     passed: string[] = []
     failed: string[] = []
+	
+	override toJSON():any|null{
+		let jsonRet = {
+			'total': this.total,
+			'passed': JSON.stringify(this.passed),
+			'failed': JSON.stringify(this.failed),
+		}
+		return jsonRet
+	}
 }
 
 let result: Result = new Result()