Remove duplicate .com strings

Author: horgh

CHANGELOG.md

@@ -17,6 +17,9 @@ CHANGELOG
   their local part when `hashAddress` is used. For example,
   `[email protected]` will become `[email protected]` for additional
   `yahoo.com` domains.
+* Duplicate `.com`s are now removed from email domain names when
+  `hashAddress` is used. For example, `example.com.com` will become
+  `example.com`.
 
 6.0.0 (2023-12-05)
 ------------------

src/request/email.spec.ts

@@ -173,6 +173,11 @@ describe('Email()', () => {
       md5: md5('[email protected]'),
       domain: 'ymail.com',
     },
+    {
+      email: '[email protected]',
+      md5: md5('[email protected]'),
+      domain: 'example.com.com',
+    },
   ];
 
   test.each(normalizeTests)('%p', (arg) => {

src/request/email.ts

@@ -314,6 +314,8 @@ export default class Email implements EmailProps {
 
     domain = punycode.toASCII(domain);
 
+    domain = domain.replace(/(?:\.com){2,}$/, '.com');
+
     if (Object.prototype.hasOwnProperty.call(Email.typoDomains, domain)) {
       domain = Email.typoDomains[domain];
     }