fix: fake is unable to return empty strings (#347)

Author: ST-DDT

src/fake.ts

@@ -116,6 +116,10 @@ export class Fake {
     // replace the found tag with the returned fake value
     res = str.replace('{{' + token + '}}', result);
 
+    if (res === '') {
+      return '';
+    }
+
     // return the response recursively until we are done finding all tags
     return this.fake(res);
   }

test/fake.spec.ts

@@ -46,5 +46,9 @@ describe('fake', () => {
         Error('Invalid method: address.foo')
       );
     });
+
+    it('should be able to return empty strings', () => {
+      expect(faker.fake('{{helpers.repeatString}}')).toBe('');
+    });
   });
 });