Mocking endpoint response in camel

Question

I have a camel route that sends to loadbalancer and processes the response. Is it possible to mock that response somehow in unit test? I tried to use velocity but it doesn't seem to work in unit tests.

score -1 · Answer 1 · answered Oct 24 '18 at 07:45

Apache already takes care of such testing requirements. There is adviceWith construct which will solve this problem.

Quoting the example directly with few modifications from the link mentioned above:

 @Test
 public void testAdvised() throws Exception {
     context.addRoutes(new RouteBuilder() {
         @Override public void configure() throws Exception {
            from("direct:start").id("my-route").to("mock:foo");
         }
    });

    context.getRouteDefinition("my-route").adviceWith(context, new RouteBuilder() {
      @Override
      public void configure() throws Exception {
      // intercept sending to mock:foo and do something else
      interceptSendToEndpoint("mock:foo")
          .skipSendToOriginalEndpoint()
          .to("log:foo")
          .to("mock:result");
      }
    });

    getMockEndpoint("mock:foo").expectedMessageCount(0);
    getMockEndpoint("mock:result").expectedMessageCount(1);

    template.sendBody("direct:start", "Hello World");

    assertMockEndpointsSatisfied();
}

Now here a route is defined as: from("direct:start").id("my-route").to("mock:foo");

And let's say we want to mock the to part here.

This is precisely doing it for me:

context.getRouteDefinition("my-route").adviceWith(context, new RouteBuilder() {
      @Override
      public void configure() throws Exception {
      // intercept sending to mock:foo and do something else
      interceptSendToEndpoint("mock:foo")
          .skipSendToOriginalEndpoint()
          .to("log:foo")
          .to("mock:result");
      }
    });

We get the reference of the route definition we want to modify from CamelContext and using the adviceWith method we can define what all action needs to be done. As here, I advised not to send to actual destination i.e. mock:foo, rather send to two other routes log:foo and mock:result.

Hope it answers your query.

This replaces original endpoint with a mocked one. What I need is to simulate response from the original endpoint. Like in java's Mockito when().then... In my original route that response goes through a list of xstls. — J.Doe, Oct 24 '18 at 07:59
Even Mockito proxies the class, and does not really execute the method, isn't your intention the same. You want to bypass the rest api call and mock the response? — Himanshu Bhardwaj, Oct 24 '18 at 08:04
Yes, I'd like to mock the response so it could be processed further — J.Doe, Oct 24 '18 at 08:10
In that case, you can share your existing route definition and I can look at how we can use this. — Himanshu Bhardwaj, Oct 25 '18 at 05:36

Mocking endpoint response in camel

1 Answers1