您可以在流引用之前使用 set 消息处理器来设置有效负载和属性。请参考以下代码
<munit:before-suite name="twitter_munit_testBefore_Suite" description="MUnit Test">
<scripting:component doc:name="Script">
<scripting:script name="groovyScriptPayloadGenerator" engine="Groovy"><![CDATA[
import groovy.json.JsonSlurper
def jsonSlurper = new JsonSlurper()
def object = jsonSlurper.parseText '''
{ "positive": 15,
"negative": 5,
"neutral": 0
}''']]></scripting:script>
</scripting:component>
</munit:before-suite>
<munit:test name="new-test-suite-tetsFlowTest" description="Test">
<munit:set payload="#[resultOfScript('groovyScriptPayloadGenerator')]" doc:name="Set Message">
<munit:inbound-properties>
<munit:inbound-property key="http.query.params" value="#[['query':'value']]"/>
</munit:inbound-properties>
</munit:set>
<flow-ref name="tetsFlow" doc:name="Flow-ref to tetsFlow"/>
</munit:test>
另请检查此以获取更多详细信息。同样的方式你也可以配置模拟。希望这可以帮助..