private StripUntrustedProxyHeadersHandler getHandler(AllowWhen allowWhen) {
        return spy(new StripUntrustedProxyHeadersHandler(allowWhen));
    }
Strip Untrusted Proxy Headers Handler Test

@author Arthur Gonigberg
@since May 27, 2020
zuul-core/src/test/java/com/netflix/netty/common/proxyprotocol/StripUntrustedProxyHeadersHandlerTest.java