void assertRequestCount(int expectedRequestCount) {
        TestUtil.waitForIt(
                this::getDataFeedPostsToStroomCount,
                expectedRequestCount,
                () -> "Forward to stroom datafeed POST count",
                Duration.ofMinutes(1),
                Duration.ofMillis(100),
                Duration.ofSeconds(1));

        WireMock.verify(expectedRequestCount, WireMock.postRequestedFor(
                WireMock.urlPathEqualTo(getDataFeedPath())));
    }
Assert that a http header is present and has this value
stroom-proxy/stroom-proxy-app/src/test/java/stroom/proxy/app/MockHttpDestination.java