Merge pull request #125 from koblas/fix_ec_ci

fix: ec/ci prefix validation

.gitignore

@@ -1,2 +1,3 @@
 node_modules
 lib
+coverage

src/ec/ci.spec.ts

@@ -1,5 +1,9 @@
 import { validate, format } from './ci';
-import { InvalidLength, InvalidChecksum } from '../exceptions';
+import {
+  InvalidLength,
+  InvalidChecksum,
+  InvalidComponent,
+} from '../exceptions';
 
 describe('ec/ci', () => {
   it('format:1714307103', () => {
@@ -25,4 +29,10 @@ describe('ec/ci', () => {
 
     expect(result.error).toBeInstanceOf(InvalidChecksum);
   });
+
+  it('validate:2714307104', () => {
+    const result = validate('2714307104');
+
+    expect(result.error).toBeInstanceOf(InvalidComponent);
+  });
 });

src/ec/ci.ts

@@ -18,7 +18,7 @@ function clean(input: string): ReturnType<typeof strings.cleanUnicode> {
 
 export function validPrefix(value: string): boolean {
   const prefix = parseInt(value.substr(0, 2), 10);
-  if (prefix === 0 || prefix > 24 || prefix === 30 || prefix === 50) {
+  if ((prefix < 1 || prefix > 24) && !(prefix === 30 || prefix === 50)) {
     // Invalid province
     return false;
   }