final TestClient testClient = new TestClient();
        final TestListener testListener = new TestListener();
        client.setCrawlerClient(testClient);
        client.setRequestListener(testListener);
        final String url = "http://test.com/";
        final ResponseData response = client.execute(RequestDataBuilder.newRequestData().get().url(url).build());
        assertEquals(1, testListener.startCount);

        return listener;
    }

    /**
     * Sets the request listener.
     * @param listener The RequestListener instance to set.
     */
    public void setRequestListener(final RequestListener listener) {
        this.listener = listener;
    }

    /**
     * Interface for listening to request lifecycle events.
     */
    public interface RequestListener {