adding tests for generateRndKey (#2932)

changing jest.config.js
transform option  from -
transform: { '^.+\\.ts?$': 'ts-jest' },
to
  transform: {   '^.+\\.(js|jsx|ts|tsx)$': ['babel-jest', { presets: ['next/babel'] }], },

web/jest.config.js

@@ -1,5 +1,5 @@
 module.exports = {
-  transform: { '^.+\\.ts?$': 'ts-jest' },
+  transform: {   '^.+\\.(js|jsx|ts|tsx)$': ['babel-jest', { presets: ['next/babel'] }], },
   testEnvironment: 'node',
   testRegex: '/tests/.*\\.(test|spec)?\\.(ts|tsx)$',
   moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'json', 'node'],