Normalize email local part to NFC

Author: ugexe

CHANGELOG.md

@@ -29,6 +29,8 @@ CHANGELOG
   used. For example, `gmali.com` will become `gmail.com`.
 * When `hashAddress` is used, the domain part of an email address is now
   normalized to NFC.
+* When `hashAddress` is used, the local part of an email address is now
+  normalized to NFC.
 
 6.0.0 (2023-12-05)
 ------------------

src/request/email.spec.ts

@@ -226,6 +226,16 @@ describe('Email()', () => {
       md5: '2b21bc76dab3c8b1622837c1d698936c',
       domain: 'b\u00FCcher.com',
     },
+    {
+      email: 'bu\[email protected]',
+      md5: '53550c712b146287a2d0dd30e5ed6f4b',
+      domain: 'example.com',
+    },
+    {
+      email: 'b\[email protected]',
+      md5: '53550c712b146287a2d0dd30e5ed6f4b',
+      domain: 'example.com',
+    },
   ];
 
   test.each(normalizeTests)('%p', (arg) => {

src/request/email.ts

@@ -322,6 +322,7 @@ export default class Email implements EmailProps {
     let domain = address.substring(atIndex + 1);
 
     domain = this.cleanDomain(domain);
+    localPart = localPart.normalize('NFC');
 
     let separator = '+';
     if (Object.prototype.hasOwnProperty.call(Email.yahooDomains, domain)) {