如何在 munit.. 中为负面场景（异常场景）编写测试用例？

Question

存在要调用 http 出站端点的流。如果 http 不可用，我想为场景编写测试用例（捕获流程中的异常并按 POSTMAN 的预期工作）。我尝试使用 throw an exception 来模拟消息处理为 http:request 时抛出的异常。但它没有用。有人可以帮助如何在 munit 中模拟异常吗？

下面是我试过的代码：

    <munit:test name="test-project-test-suite-munit-testFlowTest3" description="Test" >
    <mock:when messageProcessor="mule:set-payload" doc:name="Mock">
        <mock:with-attributes>
            <mock:with-attribute name="doc:name" whereValue="#['Set Payload']"/>
        </mock:with-attributes>
        <mock:then-return payload="#['payload3']"/>
    </mock:when>
    <mock:when messageProcessor="mule:flow" doc:name="Mock">
        <mock:with-attributes>
            <mock:with-attribute name="name" whereValue="#[matchContains('munit-testFlow2')]"/>
        </mock:with-attributes>
        <mock:then-return payload="#[]">
            <mock:invocation-properties>
                <mock:invocation-property key="variable2" value="#['response2']"/>
            </mock:invocation-properties>
        </mock:then-return>
    </mock:when>
    <mock:throw-an exception-ref="#[new org.mule.api.MessagingException()]" whenCalling="http:request" doc:name="Throw an Exception">
        <mock:with-attributes>
            <mock:with-attribute name="doc:name" whereValue="#['HTTP-RES']"/>
        </mock:with-attributes>
    </mock:throw-an>
    <flow-ref name="munit-testFlow" doc:name="munit-testFlow"/>
    <munit:assert-payload-equals message="oops failed" expectedValue="#['error-response']" doc:name="Assert Payload"/>
 </munit:test>

Answer 1

不要使用 new org.mule.api.MessagingException()，而是像下面那样使用

new IllegalArgumentException('messaging exception') 或

new java.lang.Exception("messaging exception")

org.mule.api.MessagingException() 是一个受保护的函数，可能无法以这种方式使用。实际上它属于 org.mule.api.MuleException() 又是 protected.

https://www.mulesoft.org/docs/site/3.3.0/apidocs/org/mule/api/MessagingException.html

详情请参考下方url

https://forums.mulesoft.com/questions/44929/munit-throw-exception-mock-not-working.html

工作代码

<munit:test name="sample-test-suite-sampleFlowTest" description="Test">
    <mock:throw-an exception-ref="#[new java.lang.Exception('messaging exception')]" whenCalling="http:request" doc:name="Throw an Exception">
    </mock:throw-an>
    <flow-ref name="sampleFlow" doc:name="sampleFlow"/>
    <logger level="INFO" doc:name="Logger"/>
</munit:test>

如何在 munit.. 中为负面场景（异常场景）编写测试用例？

How to write a test case for negative scenario(exception scenario) in munit..?

mule

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