ContextComponentTest.java

package org.example.test

import org.apache.camel.CamelContext;
import org.apache.camel.EndpointInject;
import org.apache.camel.Produce;
import org.apache.camel.ProducerTemplate;
import org.apache.camel.RoutesBuilder;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.component.mock.MockEndpoint;
import org.apache.camel.impl.DefaultCamelContext;
import org.apache.camel.impl.ExplicitCamelContextNameStrategy;
import org.apache.camel.impl.JndiRegistry;
import org.apache.camel.test.junit4.CamelTestSupport;
import org.junit.Test;

public class ContextComponentTest
        extends CamelTestSupport {

    @Produce
    protected ProducerTemplate template;

    @EndpointInject(uri = "mock:end")
    private MockEndpoint mock_end;

    private JndiRegistry registry;

    private CamelContext parentContext;

    @Test
    public void testBlackBoxRoutes() throws Exception {

        /* CamelContext names for the black box contexts */
        final String BLACK_BOX_1 = "bb1";
        final String BLACK_BOX_2 = "bb2";

        /* These are the context component URIs (e.g. bb1:in, bb2:out, etc) */
        final String BLACK_BOX_1_IN = BLACK_BOX_1 + ":in";
        final String BLACK_BOX_1_OUT = BLACK_BOX_1 + ":out";
        final String BLACK_BOX_2_IN = BLACK_BOX_2 + ":in";
        final String BLACK_BOX_2_OUT = BLACK_BOX_2 + ":out";

        /* Create first black box context */
        newBlackBoxContext(new RouteBuilder() {

            @Override
            public void configure() throws Exception {
                from("direct:in").setBody(constant("one")).to("direct:out");
            }
        }, BLACK_BOX_1);

        /* Create second black box context */
        newBlackBoxContext(new RouteBuilder() {

            @Override
            public void configure() throws Exception {
                from("direct:in").setBody(constant("two")).to("direct:out");
            }
        }, BLACK_BOX_2);

        /* Now wire the two black boxes together */
        parentContext.addRoutes(new RouteBuilder() {

            @Override
            public void configure() throws Exception {
                from("direct:start").to(BLACK_BOX_1_IN);
                from(BLACK_BOX_1_OUT).to(BLACK_BOX_2_IN);
                from(BLACK_BOX_2_OUT).to("mock:end");
            }
        });

        /*
         * Send a message to 'direct:start'. It should be routed through the
         * black boxes, and end up in mock:end
         */
        template.sendBody("testing", "direct:start");

        mock_end.expectedMessageCount(1);

    }

    private CamelContext newBlackBoxContext(RoutesBuilder routes, String id)
            throws Exception {
        CamelContext cxt = new DefaultCamelContext(registry);
        cxt.setNameStrategy(new ExplicitCamelContextNameStrategy(id));
        cxt.addRoutes(routes);
        cxt.start();

        registry.bind(id, cxt);
        return cxt;
    }

    protected JndiRegistry createRegistry() throws Exception {
        return registry = super.createRegistry();
    }

    @Override
    protected CamelContext createCamelContext() throws Exception {
        return parentContext = super.createCamelContext();
    }
}

Reading the thread on camel-users.. Awesome find and fix. Can't wait to get a release with this. Many thanks.