升级Rest-Assured至5.3.0后遇ContentParser.parse()方法缺失异常

问题背景 #

将应用Tomcat版本升级至10，同步把Rest-Assured从3.3.0升级到5.3.0后，执行接口测试时抛出方法缺失异常，错误指向响应体断言代码。

错误信息 #

groovy.lang.MissingMethodException: 找不到适用于参数类型(io.restassured.internal.RestAssuredResponseImpl, io.restassured.internal.ResponseParserRegistrar...)的方法io.restassured.internal.ContentParser.parse()
可能的解决方案: wait(), grep(), any()
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:70)
at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:50)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:166)
at io.restassured.internal.ResponseSpecificationImpl$HamcrestAssertionClosure.validate(ResponseSpecificationImpl.groovy:497)
at io.restassured.internal.ResponseSpecificationImpl$HamcrestAssertionClosure$validate$1.call(Unknown Source)
at io.restassured.internal.ResponseSpecificationImpl.validateResponseIfRequired(ResponseSpecificationImpl.groovy:696)
at io.restassured.internal.ResponseSpecificationImpl.this$2$validateResponseIfRequired(ResponseSpecificationImpl.groovy)
at jdk.internal.reflect.GeneratedMethodAccessor75.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at org.codehaus.groovy.runtime.callsite.PlainObjectMetaMethodSite.doInvoke(PlainObjectMetaMethodSite.java:48)
at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoCachedMethodSiteNoUnwrapNoCoerce.invoke(PogoMetaMethodSite.java:189)
at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:57)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:185)
at io.restassured.internal.ResponseSpecificationImpl.body(ResponseSpecificationImpl.groovy:270)
at io.restassured.specification.ResponseSpecification$body$2.callCurrent(Unknown Source)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:51)
at io.restassured.specification.ResponseSpecification$body$2.callCurrent(Unknown Source)
at io.restassured.internal.ResponseSpecificationImpl.body(ResponseSpecificationImpl.groovy:117)
at io.restassured.internal.ValidatableResponseOptionsImpl.body(ValidatableResponseOptionsImpl.java:244)
at com.test.mytest(MyApiTest.java:120)
// 后续栈跟踪省略

测试代码 #

given()
    .when()
        .get("/myapi")
    .then()
        .statusCode(200)
        .body("size()", is(3)) // 报错行

当前依赖配置 #

<dependency>
      <groupId>io.rest-assured</groupId>
      <artifactId>rest-assured</artifactId>
      <version>5.3.0</version>
      <scope>test</scope>
</dependency>

解决方案 #

原因分析 #

这个错误源于Rest-Assured 5.x与项目中Groovy版本冲突，或是缺少必要的JSON解析依赖：

• Rest-Assured 5.x依赖Groovy 3.x，但Tomcat 10或项目其他依赖可能引入了旧版Groovy，导致方法签名不兼容；
• 5.x版本拆分了模块，仅引入核心包可能缺失JSON解析相关组件。

解决步骤 #

1. 统一Groovy版本并排除冲突依赖
   修改依赖配置，排除Rest-Assured自带的Groovy包，显式引入兼容的Groovy JSON模块：

   <dependency>
       <groupId>io.restassured</groupId>
       <artifactId>rest-assured</artifactId>
       <version>5.3.0</version>
       <scope>test</scope>
       <exclusions>
           <exclusion>
               <groupId>org.codehaus.groovy</groupId>
               <artifactId>groovy-all</artifactId>
           </exclusion>
       </exclusions>
   </dependency>
   <dependency>
       <groupId>org.codehaus.groovy</groupId>
       <artifactId>groovy-json</artifactId>
       <version>3.0.17</version>
       <scope>test</scope>
   </dependency>
   

2. 排查依赖树清理冲突
   执行mvn dependency:tree（Maven项目）或./gradlew dependencies（Gradle项目）查看依赖树，移除其他模块引入的旧版Groovy依赖。

3. 显式指定响应解析器
   在断言前显式指定JSON解析器，避免自动解析时的兼容性问题：

   given()
       .when()
           .get("/myapi")
       .then()
           .statusCode(200)
           .using()
           .defaultParser(Parser.JSON)
           .body("size()", is(3));
   

内容的提问来源于stack exchange，提问作者Jorah Mormont