@Test
void linkContext() {

    var actionLog = new ActionLog(null, null);
    var headers = new HeaderMap();
    headers.put(HTTPHandler.HEADER_TRACE, "true");
    headers.put(HTTPHandler.HEADER_CLIENT, "client");
    handler.linkContext(actionLog, headers);
    assertThat(actionLog.trace).isTrue();
    assertThat(actionLog.clients).containsExactly("client");
}