使用动态数组调用Karate Feature时抛出PolyglotException错误求助

问题代码 #

def response = ['val1','val2']
def myKeys = response.map(function(obj){ return obj.key })
def callExtTest ="""function(key) {
    var myEncodedKey = karate.urlEncode(key);
    var myFinalUrl = url.replace('{key}', myEncodedKey);
    var result = karate.call(read('test.feature'), { myUrl: myFinalUrl });
    results.add(result);
}"""
karate.forEach(myKeys, callExtTest)

错误信息 #

rg.graalvm.polyglot.PolyglotException: TypeError: invokeMember (call) on com.intuit.karate.core.ScenarioBridge@761ac53 failed due to: no applicable overload found (overloads: [Method[public java.lang.Object com.intuit.karate.core.ScenarioBridge.call(java.lang.String)], Method[public java.lang.Object com.intuit.karate.core.ScenarioBridge.call(boolean,java.lang.String,org.graalvm.polyglot.Value)], Method[public java.lang.Object com.intuit.karate.core.ScenarioBridge.call(java.lang.String,org.graalvm.polyglot.Value)], Method[public java.lang.Object com.intuit.karate.core.ScenarioBridge.call(boolean,java.lang.String)]],arguments: [JavaObject[classpath:features/filename.feature (com.intuit.karate.core.Feature)] (HostObject), DynamicObject@68b0e5ec (DefaultLayout)])
.:anonymous(Unnamed:4)

原因分析 #

1. 调用方法重载不匹配：karate.call的重载列表中，没有「Feature对象 + 参数Map」的组合。你用read('test.feature')返回了Feature实例，再传入参数Map，触发了无匹配重载的错误。
2. 数据结构错误：response是字符串数组，obj.key访问会返回undefined，最终myKeys是无效的[undefined, undefined]，导致后续URL替换逻辑失效。
3. 变量未初始化：results变量未提前声明初始化，调用results.add()会触发额外错误。

解决办法 #

• 修正karate.call调用方式：直接传递Feature路径字符串而非read()返回的Feature对象，搭配参数Map：

  var result = karate.call('test.feature', { myUrl: myFinalUrl });
  

  若需复用上下文，可使用带布尔参数的重载：

  var feature = read('test.feature');
  var result = karate.call(true, feature.path, { myUrl: myFinalUrl });
  

• 修正数据结构：将response改为含key属性的对象数组，确保myKeys能获取有效值：

  def response = [{key: 'val1'}, {key: 'val2'}]
  

• 初始化结果数组：提前声明results为空数组：

  def results = []
  

内容的提问来源于stack exchange，提问作者user1980552