FINERACT-2205: Add tests when charge is added after the charge off date and forbid backdated charge-off transactions in the middle of the monetary activity.

fineract-loan/src/main/java/org/apache/fineract/portfolio/loanaccount/domain/Loan.java

@@ -3581,4 +3581,17 @@ public class Loan extends AbstractAuditableWithUTCDateTimeCustom<Long> {
         return (chargeOffTransaction == null) ? false : (chargeOffTransaction.getDateOf().compareTo(onDate) <= 0);
     }
 
+    public boolean hasMonetaryActivityAfter(final LocalDate transactionDate) {
+        for (LoanTransaction transaction : this.getLoanTransactions()) {
+            if (transaction.getTransactionDate().isAfter(transactionDate) && !transaction.isNonMonetaryTransaction()) {
+                return true;
+            }
+        }
+        for (LoanCharge loanCharge : this.getLoanCharges()) {
+            if (!loanCharge.determineIfFullyPaid() && loanCharge.getSubmittedOnDate().isAfter(transactionDate)) {
+                return true;
+            }
+        }
+        return false;
+    }
 }

fineract-loan/src/main/java/org/apache/fineract/portfolio/loanaccount/domain/LoanCharge.java

@@ -511,7 +511,7 @@ public class LoanCharge extends AbstractAuditableWithUTCDateTimeCustom<Long> {
         return this.dueDate; // TODO delete duplicated method
     }
 
-    private boolean determineIfFullyPaid() {
+    public boolean determineIfFullyPaid() {
         if (this.amount == null) {
             return true;
         }