test for base64Utils.js (#4334)

* Creating base64Utils.test.js for Unit testing of base64Utils

* refactoring base64Utils for proper implementation of test

Author: omsuneri

js/__tests__/base64Utils.test.js

@@ -0,0 +1,32 @@
+const base64Utils = require('../base64Utils');
+global.TextEncoder = require('util').TextEncoder;
+global.TextDecoder = require('util').TextDecoder;   
+
+describe('base64Utils', () => {
+    test('base64Encode should correctly encode a string to Base64', () => {
+        expect(base64Utils.base64Encode('hello')).toBe('aGVsbG8=');
+        expect(base64Utils.base64Encode('Base64 Encoding!')).toBe('QmFzZTY0IEVuY29kaW5nIQ==');
+        expect(base64Utils.base64Encode('123456')).toBe('MTIzNDU2');
+    });
+
+    test('base64Decode should correctly decode a Base64 string', () => {
+        expect(base64Utils.base64Decode('aGVsbG8=')).toBe('hello');
+        expect(base64Utils.base64Decode('QmFzZTY0IEVuY29kaW5nIQ==')).toBe('Base64 Encoding!');
+        expect(base64Utils.base64Decode('MTIzNDU2')).toBe('123456');
+    });
+
+    test('base64Encode and base64Decode should be reversible', () => {
+        const originalText = 'Reversible Test!';
+        const encoded = base64Utils.base64Encode(originalText);
+        const decoded = base64Utils.base64Decode(encoded);
+        expect(decoded).toBe(originalText);
+    });
+
+    test('base64Encode should handle empty strings', () => {
+        expect(base64Utils.base64Encode('')).toBe('');
+    });
+
+    test('base64Decode should handle empty strings', () => {
+        expect(base64Utils.base64Decode('')).toBe('');
+    });
+});

js/base64Utils.js

@@ -12,7 +12,7 @@ function base64Encode(str) {
     let encoder = new TextEncoder();
     let uint8Array = encoder.encode(str);
     let binaryString = String.fromCharCode(...uint8Array);
-    return (binaryString);
+    return btoa(binaryString); // Proper Base64 encoding
 }
 
 /**
@@ -27,5 +27,6 @@ function base64Decode(str) {
     return decoder.decode(uint8Array);
 }
 
-export default { base64Encode, base64Decode };
-//module.exports = { base64Encode, base64Decode };
+if (typeof module !== 'undefined' && module.exports) {
+    module.exports = { base64Encode, base64Decode };
+}