Added validation for UPI

README.md

@@ -164,6 +164,7 @@ Validator                               | Description
 **isSemVer(str)**                       | check if the string is a Semantic Versioning Specification (SemVer).
 **isSurrogatePair(str)**                | check if the string contains any surrogate pairs chars.
 **isUppercase(str)**                    | check if the string is uppercase.
+**isUPI(str)**                          | check id the string is UPI
 **isSlug(str)**                         | check if the string is of type slug.
 **isStrongPassword(str [, options])**   | check if the string can be considered a strong password or not. Allows for custom requirements or scoring rules. If `returnScore` is true, then the function returns an integer score for the password rather than a boolean.<br/>Default options: <br/>`{ minLength: 8, minLowercase: 1, minUppercase: 1, minNumbers: 1, minSymbols: 1, returnScore: false, pointsPerUnique: 1, pointsPerRepeat: 0.5, pointsForContainingLower: 10, pointsForContainingUpper: 10, pointsForContainingNumber: 10, pointsForContainingSymbol: 10 }`
 **isTime(str [, options])**             | check if the string is a valid time e.g. [`23:01:59`, new Date().toLocaleTimeString()].<br/><br/> `options` is an object which can contain the keys `hourFormat` or `mode`.<br/><br/>`hourFormat` is a key and defaults to `'hour24'`.<br/><br/>`mode` is a key and defaults to `'default'`. <br/><br/>`hourFomat` can contain the values `'hour12'` or `'hour24'`, `'hour24'` will validate hours in 24 format and `'hour12'` will validate hours in 12 format. <br/><br/>`mode` can contain the values `'default'` or `'withSeconds'`, `'default'` will validate `HH:MM` format, `'withSeconds'` will validate the `HH:MM:SS` format.

src/index.js

@@ -25,6 +25,7 @@ import isPassportNumber from './lib/isPassportNumber';
 import isPort from './lib/isPort';
 import isLowercase from './lib/isLowercase';
 import isUppercase from './lib/isUppercase';
+import isUPI from './lib/isUPI';
 
 import isIMEI from './lib/isIMEI';
 
@@ -155,6 +156,7 @@ const validator = {
   isPort,
   isLowercase,
   isUppercase,
+  isUPI,
   isAscii,
   isFullWidth,
   isHalfWidth,

src/lib/isUPI.js

@@ -0,0 +1,8 @@
+import assertString from './util/assertString';
+
+const upiRegex = /^[a-zA-Z0-9]+@[a-zA-Z]+$/;
+
+export default function isUPI(str) {
+  assertString(str);
+  return upiRegex.test(str);
+}

test/validators.test.js

@@ -4033,6 +4033,26 @@ describe('Validators', () => {
     });
   });
 
+  it('should validate upi strings', () => {
+    test({
+      validator: 'isUPI',
+      valid: [
+        'test@upi',
+        'test@paytm',
+        'test@ybl',
+        'test@okhdfcbank',
+      ],
+      invalid: [
+        'test@',
+        '1224',
+        '@ss2',
+        'test@upi@',
+        'test@123',
+        'test@1upi',
+      ],
+    });
+  });
+
   it('should validate integers', () => {
     test({
       validator: 'isInt',