Camel Splitter Unit Test get wrong ExpectedMessageCount - spring

Question

I have to write unit test for a camel RouteBuilder that use splitter pattern.
Here my RouteConfiguration
protected void configureTest(){
from("direct:in").id("in")
.to("mock:a")
.split(body())
.to("mock:b")
.end();
}
And the test
public class AlertingRouteBuilderTest extends CamelSpringTestSupport {
#Test
public void testest() throws Exception {
String[] bodyArray = new String[]{"tenant1", "tenant2", "tenant3"};
getMockEndpoint("mock:a").setExpectedMessageCount(1);
getMockEndpoint("mock:b").setExpectedMessageCount(3);
template.sendBody("direct:in", bodyArray);
assertNotNull(context.hasEndpoint("direct:in"));
assertMockEndpointsSatisfied();
}
}
#Override
protected AbstractApplicationContext createApplicationContext() {
return new ClassPathXmlApplicationContext("classpath:cmCtx_alertingProcessTest.xml");
}
with this context.xml file
<bean id="A"
class="org.mockito.Mockito" factory-method="mock">
<constructor-arg value="foo.AProcessor"/>
</bean>
<bean id="B"
class="org.mockito.Mockito" factory-method="mock">
<constructor-arg value="foo.BProcessor"/>
</bean>
<bean id="routeBuilder"
class="foo.RouteBuilder" >
</bean>
<camel:camelContext id="context-objectAnalysis" trace="true" errorHandlerRef="errorHandler">
<camel:propertyPlaceholder id="properties" location="camel.properties"/>
<camel:routeBuilder ref="routeBuilder"/>
</camel:camelContext>
I tried different way to split my body
.split(body())
.split(body(String[].class))
....
But I get
java.lang.AssertionError: mock://b Received message count. Expected: <3> but was: <0>
I don't understand why my splitter does'nt go into my mock:b processor.
In the trace console I have
16:18:34.046 [main] DEBUG o.a.camel.processor.SendProcessor - >>>> Endpoint[mock://a] Exchange[Message: [Ljava.lang.String;#58ec5e8]
16:18:34.051 [main] DEBUG o.a.c.component.mock.MockEndpoint - mock://a >>>> 0 : Exchange[Message: [Ljava.lang.String;#58ec5e8] with body: [Ljava.lang.String;#58ec5e8 and headers:{breadcrumbId=ID-EFR02223-61984-1495635511863-0-1}
16:18:34.053 [main] INFO o.a.c.processor.interceptor.Tracer - ID-EFR02223-61984-1495635511863-0-2 >>> (direct:in) mock://a --> split[bodyAs[[Ljava.lang.String;]] <<< Pattern:InOnly, Headers:{breadcrumbId=ID-EFR02223-61984-1495635511863-0-1}, BodyType:String[], Body:[Ljava.lang.String;#58ec5e8
16:18:34.064 [main] DEBUG o.a.c.processor.MulticastProcessor - Done sequential processing 3 exchanges
Tell me if you need more info to help me.
EDIT:
camel version 2.12.1
Thanks.