fix(random): prevent infinite do-while (#1938)

src/modules/random/index.ts

@@ -125,6 +125,8 @@ export class RandomModule {
     ];
     let result: string;
 
+    let iteration = 0;
+
     do {
       // randomly pick from the many faker methods that can generate words
       const randomWordMethod = this.faker.helpers.arrayElement(wordMethods);
@@ -133,6 +135,14 @@ export class RandomModule {
         result = randomWordMethod();
       } catch {
         // catch missing locale data potentially required by randomWordMethod
+        iteration++;
+
+        if (iteration > 100) {
+          throw new FakerError(
+            'No matching word data available for the current locale'
+          );
+        }
+
         continue;
       }
     } while (!result || bannedChars.some((char) => result.includes(char)));

test/random.spec.ts

@@ -1,5 +1,5 @@
 import { describe, expect, it } from 'vitest';
-import { faker, FakerError, fakerZH_CN } from '../src';
+import { Faker, faker, FakerError, fakerZH_CN } from '../src';
 import { seededTests } from './support/seededRuns';
 import { times } from './support/times';
 
@@ -81,6 +81,12 @@ describe('random', () => {
             );
           }
         );
+
+        it('should throw error if no data are available', () => {
+          const faker = new Faker({ locale: [{ title: 'custom' }] });
+
+          expect(() => faker.random.word()).toThrowError();
+        });
       });
 
       describe('words', () => {