Promo Unit tests - promotions-helper.js

Also made promotions-helper.js functions null safe

jest.config.js

@@ -29,7 +29,7 @@ module.exports = {
   testMatch: ["**/*.spec.(js|jsx|ts|tsx)|**/__tests__/*.(js|jsx|ts|tsx)"],
   coverageThreshold: {
     global: {
-      statements: 73,
+      statements: 76,
     },
   },
   // Uncomment this to avoid the massive amount of warnings we are getting for onSubmit and onInvalidSubmit

src/helpers/promotions-helper.js

@@ -34,7 +34,7 @@ const stackingPromoErrorCodes = [
     promoErrorCodes.SIMILAR_PROMO_ALREADY_ON_ORDER,
 ];
 
-const excludeFromInactivePromoErrorCodes = [
+export const excludeFromInactivePromoErrorCodes = [
     promoErrorCodes.UNKNOWN,
     promoErrorCodes.PROMO_NOT_YET_IN_USE,
     promoErrorCodes.PROMO_USAGE_COUNT_EXCEEDED,
@@ -45,7 +45,7 @@ const excludeFromInactivePromoErrorCodes = [
 export const pagesToStripPromoQueryStringFrom = ["quote", "payment-method"];
 
 export function getPromosWithAddableVaps(promoList) {
-    if (!promoList.length) {
+    if (promoList == null || !promoList.length) {
         return [];
     }
 
@@ -53,8 +53,14 @@ export function getPromosWithAddableVaps(promoList) {
 }
 
 export function getLineItemsThatMatchPromos(promos, availableLineItems) {
+    if (promos == null || availableLineItems == null) {
+        return [];
+    }
     const matchingLineItems = [];
     promos.forEach((promo) => {
+        if (promo.discountedLineItemIds == null) {
+            return;
+        }
         promo.discountedLineItemIds.forEach((discountedLineItemId) => {
             matchingLineItems.push(
                 ...availableLineItems.filter((lineItem) => lineItem.id === discountedLineItemId)
@@ -180,6 +186,9 @@ export function buildToastMessagesFromRevalidateOrValidatePromoResponse(
     oldActivePromos = [],
     oldInactivePromos = []
 ) {
+    if (promoResponse == null) {
+        return [];
+    }
     const alerts = [];
     // Revalidate always has an "errors" array
     if (promoResponse.errors) {
@@ -213,19 +222,24 @@ export function buildToastMessagesFromRevalidateOrValidatePromoResponse(
             );
             alerts.push(createPromoSuccessAlert(promoCodeToDisplay));
         } else {
-            alerts.push(
-                createPromoErrorAlert(
-                    promoResponse.promoCode,
-                    promoResponse.errorCode,
-                    promoResponse.additionalInfo
-                )
-            );
+            if (promoResponse.promoCode) {
+                alerts.push(
+                    createPromoErrorAlert(
+                        promoResponse.promoCode,
+                        promoResponse.errorCode,
+                        promoResponse.additionalInfo
+                    )
+                );
+            }
         }
     }
     return alerts;
 }
 
 export function getPromosThatMatchLineItemsOnOrder(promos, lineItemsOnOrder) {
+    if (promos == null || lineItemsOnOrder == null) {
+        return [];
+    }
     const matchingPromoCodes = [];
     const matchingPromos = [];
     const consolidatedPromosWithIds = {};
@@ -266,7 +280,7 @@ export function getVapsThatNeedToBeAddedToSatisfyPromos(
     availableLineItems,
     lineItemsOnOrder
 ) {
-    const clonedVaps = deepClone(lineItemsOnOrder.vaps ?? []);
+    const clonedVaps = deepClone(lineItemsOnOrder?.vaps ?? []);
     const promosWithAddableVaps = getPromosWithAddableVaps(promos);
     if (promosWithAddableVaps.length) {
         const matchingLineItems = getLineItemsThatMatchPromos(
@@ -311,7 +325,7 @@ export function getNewlyInactivatedPromos(oldInactivePromos, newInactivePromos)
     const inactivePromoCodesFromResponse =
         getPromoCodesFromPromoObjectsWithoutDuplicates(newInactivePromos);
     return inactivePromoCodesFromResponse.filter(
-        (errorPromoCode) => !oldInactivePromos.includes(errorPromoCode)
+        (errorPromoCode) => !oldInactivePromos?.includes(errorPromoCode)
     );
 }
 
@@ -365,8 +379,9 @@ export function getPromoCodesFromPromoObjectsWithoutDuplicates(promos) {
 
 // private methods
 function findLineItemsWithPartType(typeToFind, itemsToSearch) {
-    const partTypeMatches = itemsToSearch?.filter(
-        (lineItem) => lineItem.partType.toUpperCase() === typeToFind.toUpperCase()
-    );
+    const partTypeMatches =
+        itemsToSearch?.filter(
+            (lineItem) => lineItem.partType.toUpperCase() === typeToFind.toUpperCase()
+        ) ?? [];
     return partTypeMatches;
 }