Handle edge case and add tests for functions

client/jest.config.cjs

@@ -0,0 +1,32 @@
+module.exports = {
+  preset: 'ts-jest',
+  testEnvironment: 'jsdom',
+  moduleNameMapper: {
+    '^@/(.*)$': '<rootDir>/src/$1',
+    '^../components/DynamicJsonForm$': '<rootDir>/src/utils/__mocks__/DynamicJsonForm.ts',
+    '^../../components/DynamicJsonForm$': '<rootDir>/src/utils/__mocks__/DynamicJsonForm.ts'
+  },
+  transform: {
+    '^.+\\.tsx?$': ['ts-jest', {
+      useESM: true,
+      jsx: 'react-jsx',
+      tsconfig: 'tsconfig.jest.json'
+    }]
+  },
+  extensionsToTreatAsEsm: ['.ts', '.tsx'],
+  testRegex: '(/__tests__/.*|(\\.|/)(test|spec))\\.(jsx?|tsx?)$',
+  // Exclude directories and files that don't need to be tested
+  testPathIgnorePatterns: [
+    '/node_modules/',
+    '/dist/',
+    '/bin/',
+    '\\.config\\.(js|ts|cjs|mjs)$'
+  ],
+  // Exclude the same patterns from coverage reports
+  coveragePathIgnorePatterns: [
+    '/node_modules/',
+    '/dist/',
+    '/bin/',
+    '\\.config\\.(js|ts|cjs|mjs)$'
+  ]
+};