驼峰模拟-模拟端点。whenAnyExchangeReceived进程方法未执行

我有下面的示例代码,为什么流程方法在MockEndpoint中。whenAnyExchangeReceived未执行?

我希望响应是“来自模拟远程http调用的预期正文”,但实际响应是在请求中传递的(“骆驼石”)。

public class CamelMockRemoteHttpCallTest extends CamelTestSupport {

    @Override
    protected RouteBuilder createRouteBuilder() throws Exception {
        return new RouteBuilder() {
            @Override
            public void configure() throws Exception {
                from("direct:start")
                    .to("http://abc/bcd")
                    ;
            }
        };
    }

    @Override
    public String isMockEndpointsAndSkip() {
        return "http://abc/bcd";
    }

    @Test
    public void testSimulateErrorUsingMock() throws Exception {
        MockEndpoint http = getMockEndpoint("mock:http://abc/bcd");

        http.whenAnyExchangeReceived(new Processor() {
            public void process(Exchange exchange) throws Exception {
                exchange.getOut().setBody("Expected Body from mock remote http call");   //why this line doesn't execute
            }
        });

        String response = template.requestBody("direct:start", "Camel rocks", String.class);

        assertEquals("Expected Body from mock remote http call", response);  //failed, the actual response is "Camel rocks"
    }
}