### Question:
LedgersSpiPaymentMapperHelper { static String mapPisExecutionRule(PisExecutionRule executionRule) { if (executionRule == null) { return null; } return executionRule.getValue(); } private  LedgersSpiPaymentMapperHelper();   }### Answer:
@Test void mapPisExecutionRule() { assertNull(LedgersSpiPaymentMapperHelper.mapPisExecutionRule(null)); for (PisExecutionRule executionRule : PisExecutionRule.values()) { assertEquals(executionRule.getValue(), LedgersSpiPaymentMapperHelper.mapPisExecutionRule(executionRule)); } }