chore: validate currency data region

Author: tsvetomir

src/cldr/currency.js

@@ -76,7 +76,11 @@ export function territoryCurrencyCode(territory) {
     if (!currencyData) {
         throw new Error("Cannot determine currency. Please load the supplemental currencyData.");
     }
+
     const regionCurrencies = currencyData.region[territory];
+    if (!regionCurrencies) {
+        throw new Error("No currency data for region " + territory);
+    }
     const currencyCode = Object.keys(regionCurrencies[regionCurrencies.length - 1])[0];
 
     return currencyCode;
@@ -89,4 +93,4 @@ export function localeCurrency(locale) {
         numbers.localeCurrency = territoryCurrencyCode(localeTerritory(info));
     }
     return numbers.localeCurrency;
-}
+}

test/numbers.js

@@ -5,6 +5,10 @@ const likelySubtags = require("cldr-data/supplemental/likelySubtags.json");
 const numbers = require("cldr-data/main/bg/numbers.json");
 const currencies = require("cldr-data/main/bg/currencies.json");
 const currencyData = require("cldr-data/supplemental/currencyData.json");
+
+// CUSTOM region is used in tests below
+currencyData.supplemental.currencyData.region.CUSTOM = [{}];
+
 load(likelySubtags, currencyData, numbers, currencies);
 
 function loadCustom(options) {
@@ -239,6 +243,14 @@ describe('standard currency formatting', () => {
         expect(formatNumber(123, "c")).toEqual("$123.00");
     });
 
+    it("should apply format when passing language", () => {
+        expect(formatNumber(10, "c", "bg")).toEqual("10,00 лв.");
+    });
+
+    it("should apply format when passing language and territory", () => {
+        expect(formatNumber(10, "c", "bg-BG")).toEqual("10,00 лв.");
+    });
+
     it("should apply format when passing object", () => {
         expect(formatNumber(10, { style: "currency" })).toEqual("$10.00");
     });