public static ForwardHttpPostConfig createForwardHttpPostConfig(final boolean instant) {
        return ForwardHttpPostConfig.builder()
                .enabled(true)
                .instant(instant)
                .forwardUrl("http://localhost:"
                            + MockHttpDestination.DEFAULT_STROOM_PORT
                            + getDataFeedPath())
                .name("Mock Stroom datafeed")
                .build();
    }
Assert that a http header is present and has this value
stroom-proxy/stroom-proxy-app/src/test/java/stroom/proxy/app/MockHttpDestination.java