user1760178 user1760178 - 5 months ago 34
Java Question

Testing sub-flows in Mule

I have started writing test cases to my Mule project.

I have written the functional test case for my Main Flows as follows.

public void testMainFlow_1() throws Exception{
MuleClient client = muleContext.getClient();
MuleMessage result = client.send(helloServiceAddress, fileAsString("SamplePayloads/input_Request.xml"), properties);
assertNotNull("Null Result", result);
assertEquals(result.getPayloadAsString(), fileAsString("SampleResponses/sampleResponse.xml"));

}


But how can I test my sub-flows. They don't have any end-points. So how can I pass payload to them and test it.

Given below is my flow config.

<flow name="main_flow" >
....
....
<flow-ref name="subflow_1" />
....
....
<flow-ref name="subflow_2" />
....
....
</flow>

<sub-flow name="subflow_1">
....
<some-transformer ... />
<out-bound call to web-service />
<some-transformer ... />
....
</sub-flow>

<sub-flow name="subflow_2">
....
<some-transformer ... />
<out-bound call to web-service />
<some-transformer ... />
....
</sub-flow>

Answer

Using the FunctionalTestCase it should be as simple as:

MessageProcessor subFlow = muleContext.getRegistry().lookupObject("subflow_1");
MuleEvent result = subFlow.process(getTestEvent("test_data"));

but it doesn't work.

For now, the best approach IMO consists in having a test config that contains flow wrappers for the sub-flows you want to test and load this test config alongside your main config in the FunctionalTestCase.

@genjosanzo's approach works too but it is based on associating the sub-flow with a pre-existing main-flow from test code itself. I personally think it would be stricter to create test flows instead.

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