@Test
public void enhanceLogWithCustomField() {

    final String otherFieldName = "other-field";
    final String otherFieldValue = "other-value";
    final Map<String, Object> expectedMap = new HashMap<>(DEFAULT_MDC);
    expectedMap.put(otherFieldName, otherFieldValue);
    LogUtil.enhanceLogWithCustomField(log, otherFieldName, otherFieldValue);
    Mockito.verify(log).setMDC(expectedMap);
}