Why isn't Camel route test resolving placeholder endpoint? - apache-camel

Question

I have a simple Camel route test class that I have expanded to use a placeholder for an endpoint.
import org.apache.camel.CamelContext;
import org.apache.camel.EndpointInject;
import org.apache.camel.Produce;
import org.apache.camel.ProducerTemplate;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.component.mock.MockEndpoint;
import org.apache.camel.component.properties.PropertiesComponent;
import org.apache.camel.test.junit4.CamelTestSupport;
import org.junit.Test;
import java.util.Properties;
public class SimpleTestRoute extends CamelTestSupport {
#EndpointInject(uri = "{{test.route.out}}")
protected MockEndpoint resultEndpoint;
#Produce(uri = "direct:start")
protected ProducerTemplate template;
#Test
public void test() throws Exception {
}
#Override
protected RouteBuilder createRouteBuilder() {
return new RouteBuilder() {
#Override
public void configure() throws Exception {
from("direct:start").to("{{test.route.out}}");
}
};
}
#Override
protected CamelContext createCamelContext() throws Exception {
Properties props = new Properties();
props.setProperty("test.route.out", "mock:result");
CamelContext context = super.createCamelContext();
PropertiesComponent pc = context.getComponent("properties", PropertiesComponent.class);
pc.setOverrideProperties(props);
return context;
}
}
However, when I run I get
org.apache.camel.ResolveEndpointFailedException: Failed to resolve endpoint: {{test.route.out}} due to: Property with key [test.route.out] not found in properties from text: {{test.route.out}}
at ...
Caused by: java.lang.IllegalArgumentException: Property with key [test.route.out] not found in properties from text: {{test.route.out}}
at ...
I have tried various combinations of brace locations without progress. Now I suspect the problem is that the override is not being set but I cannot see what I am doing wrong or how to resolve it.
FWIW, I am running camel 2.13.1