使用karate.get时是否支持callonce函数？相关报错咨询

需求 #

希望在场景运行前确保请求头已准备就绪，尝试使用如下代码实现：

* def authHeaders = karate.get('#(authHeaders)', callonce read('classpath:adapters/authentication.feature'))

初始报错 #

执行后出现语法错误：

org.graalvm.polyglot.PolyglotException: SyntaxError: Unnamed:1:39 Expected , but found read
karate.get('#(authHeaders)', callonce read('classpath:adapters/authentication.feature'))

尝试用括号包裹调用的默认值后，仍报相同错误。后续又尝试了多种写法，结果如下：

尝试1 #

写法：

* def authtHeaders = karate.get('authHeaders', '#(read("classpath:adapters/authentication.feature"))')
* print authHeaders

结果：

01: karate.log('[print]',authHeaders)
<<<<
org.graalvm.polyglot.PolyglotException: ReferenceError: "authHeaders" is not defined

尝试2 #

写法：

* def authtHeaders = karate.get('authHeaders', '#(read(\'classpath:adapters/authentication.feature\'))')
* print authHeaders

结果：

01: karate.log('[print]',authHeaders)
<<<<
org.graalvm.polyglot.PolyglotException: ReferenceError: "authHeaders" is not defined
- <js>.:program(Unnamed:1)

尝试3 #

写法：

* def authtHeaders = karate.get('authHeaders', read('#(classpath:adapters/authentication.feature)'))

结果：

01: karate.get('authHeaders', read('#(classpath:adapters/authentication.feature)'))
<<<<
org.graalvm.polyglot.PolyglotException: java.io.FileNotFoundException: <<myRoot>>/src/test/java/adapters/#(classpath:adapters/authentication.feature) (No such file or directory)

尝试4 #

写法：

* def authtHeaders = karate.get('authHeaders', read('#(\'classpath:authentication.feature\')'))

结果：

01: karate.get('authHeaders', read('#(\'classpath:authentication.feature\')'))
<<<<
org.graalvm.polyglot.PolyglotException: java.io.FileNotFoundException: <<myRoot>>/src/test/java/adapters/#('classpath:authentication.feature') (No such file or directory)

尝试5 #

写法：

* def authtHeaders = karate.get('authHeaders', read('authentication.feature'))

结果：

01: karate.log('[print]',authHeaders)
<<<<
org.graalvm.polyglot.PolyglotException: ReferenceError: "authHeaders" is not defined

尝试6 #

写法：

* def authHeaders = '#(karate.get(\'authHeaders\', callonce read(\'classpath:adapters/authentication.feature\')))'
* print authHeaders

结果：

13:49:07.424 [com.intuit.karate.cli.Main.main()] INFO  com.intuit.karate - [print] #(karate.get('authHeaders', callonce read('classpath:adapters/authentication.feature'))) 

尝试7 #

写法：

* def authHeaders = #(karate.get('authHeaders', callonce read('classpath:adapters/authentication.feature')))

结果：

01: #(karate.get('authHeaders', callonce read('classpath:adapters/authentication.feature')))
<<<<
org.graalvm.polyglot.PolyglotException: SyntaxError: Unnamed:1:0 Expected an operand but found error
#(karate.get('authHeaders', callonce read('classpath:adapters/authentication.feature')))
^

疑问 #

请问这种karate.get结合callonce read的用法是否被支持？或者有没有其他可行的实现方式来确保场景运行前请求头就绪？

内容的提问来源于stack exchange，提问作者mike