### Question:
SecRuleNameDecoder { public static ClassifierName getClassifierRefName(SecurityRule secRule) { Direction direction = SecRuleEntityDecoder.getDirection(secRule); ClassifierName classifierInstanceName = getClassifierInstanceName(secRule); String crName = new StringBuilder().append(direction.name()) .append(MappingUtils.NAME_DOUBLE_DELIMETER) .append(classifierInstanceName.getValue()) .toString(); return new ClassifierName(crName); } private  SecRuleNameDecoder(); static SubjectName getSubjectName(SecurityRule secRule); static RuleName getRuleName(SecurityRule secRule); static ClassifierName getClassifierRefName(SecurityRule secRule); static ClassifierName getClassifierInstanceName(SecurityRule secRule); static ClauseName getClauseName(SecurityRule secRule);  }### Answer:
@Test public final void testGetClassifierRefName() { secRule.setDirection(DirectionIngress.class); secRule.setEthertype(EthertypeV4.class); ClassifierName clsfInstanceName = SecRuleNameDecoder.getClassifierInstanceName(secRule.build()); String crName = new StringBuilder().append(Direction.In.name()) .append(MappingUtils.NAME_DOUBLE_DELIMETER) .append(clsfInstanceName.getValue()) .toString(); ClassifierName expectedClsfRefName = new ClassifierName(crName); assertEquals(expectedClsfRefName, SecRuleNameDecoder.getClassifierRefName(secRule.build())); }