Merge pull request #13662 from transcom/B-20940-INT

B 20940 int 2

pkg/services/shipment_summary_worksheet/shipment_summary_worksheet.go

@@ -867,15 +867,21 @@ func FormatSITDaysInStorage(entryDate *time.Time, departureDate *time.Time) stri
 func formatDisbursement(expensesMap map[string]float64, ppmRemainingEntitlement float64) string {
 	disbursementGTCC := expensesMap["TotalGTCCPaid"] + expensesMap["StorageGTCCPaid"]
 	disbursementGTCCB := ppmRemainingEntitlement + expensesMap["StorageMemberPaid"]
+	var disbursementMember float64
 	// Disbursement GTCC is the lowest value of the above 2 calculations
 	if disbursementGTCCB < disbursementGTCC {
 		disbursementGTCC = disbursementGTCCB
 	}
-	// Disbursement Member is remaining entitlement plus member SIT minus GTCC Disbursement, not less than 0.
-	disbursementMember := ppmRemainingEntitlement + expensesMap["StorageMemberPaid"] - disbursementGTCC
-	if disbursementMember < 0 {
-		disbursementMember = 0
+	if disbursementGTCC < 0 {
+		// The only way this can happen is if the member overdrafted on their advance, resulting in negative GTCCB. In this case, the
+		// disbursement member value will be liable for the negative difference, meaning they owe this money to the govt.
+		disbursementMember = disbursementGTCC
+		disbursementGTCC = 0
+	} else {
+		// Disbursement Member is remaining entitlement plus member SIT minus GTCC Disbursement, not less than 0.
+		disbursementMember = ppmRemainingEntitlement + expensesMap["StorageMemberPaid"] - disbursementGTCC
 	}
+
 	// Return formatted values in string
 	disbursementString := "GTCC: " + FormatDollars(disbursementGTCC) + "\nMember: " + FormatDollars(disbursementMember)
 	return disbursementString

pkg/services/shipment_summary_worksheet/shipment_summary_worksheet_test.go

@@ -1414,6 +1414,17 @@ func (suite *ShipmentSummaryWorksheetServiceSuite) TestFormatDisbursement() {
 	expensesMap["StorageMemberPaid"] = 200.00
 	result = formatDisbursement(expensesMap, ppmRemainingEntitlement)
 	suite.Equal(result, expectedResult)
+
+	// Test case 3: GTCC calculation is less than 0
+	expectedResult = "GTCC: " + FormatDollars(0) + "\nMember: " + FormatDollars(-250.00)
+	expensesMap = make(map[string]float64)
+	expensesMap["TotalGTCCPaid"] = 0
+	expensesMap["StorageGTCCPaid"] = 0
+	ppmRemainingEntitlement = -300.00
+	expensesMap["StorageMemberPaid"] = 50.00
+	result = formatDisbursement(expensesMap, ppmRemainingEntitlement)
+	suite.Equal(result, expectedResult)
+
 }
 
 func (suite *ShipmentSummaryWorksheetServiceSuite) TestFormatAdditionalShipments() {