feat(test): add Jest config for JSX parsing and removeAccents tests

- Add tsconfig.jest.json with jsx: react for Jest to parse TSX files
- Add jest.setup.js to provide global Utils object for tests
- Update jest.config.js to use Jest-specific tsconfig and setup file
- Add 12 test cases for Format.removeAccents function
- Revert removeAccents to match original JS behaviour (per PR review)
- Document remaining untested time-relative functions

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: talissoncosta

frontend/common/utils/__tests__/format.test.ts

@@ -200,4 +200,39 @@ describe('Format', () => {
       expect(Format.userDisplayName(user)).toBe(expected)
     })
   })
+
+  describe('removeAccents', () => {
+    it.each`
+      input         | expected
+      ${'Café'}     | ${'Cafe'}
+      ${'naïve'}    | ${'naive'}
+      ${'Müller'}   | ${'Muller'}
+      ${'Agüero'}   | ${'Aguero'}
+      ${'résumé'}   | ${'resume'}
+      ${'Ångström'} | ${'Angstrom'}
+      ${'Señor'}    | ${'Senor'}
+      ${'Łódź'}     | ${'Lodz'}
+      ${'hello'}    | ${'hello'}
+      ${'HELLO'}    | ${'HELLO'}
+      ${null}       | ${null}
+      ${undefined}  | ${undefined}
+    `('removeAccents("$input") returns "$expected"', ({ expected, input }) => {
+      expect(Format.removeAccents(input)).toBe(expected)
+    })
+  })
+
+  /*
+   * ============================================================================
+   * UNTESTED FUNCTIONS
+   * ============================================================================
+   *
+   * Date/time wrappers (moment, dateAndTime, monthAndYear, time):
+   * - These are thin wrappers around moment.js - testing them would just test
+   *   the third-party library, not our code.
+   *
+   * Time-relative functions (age, ago, countdown, countdownMinutes):
+   * - Use moment() to get current time, making output non-deterministic
+   * - Would need dependency injection (Clock pattern) to test properly
+   * ============================================================================
+   */
 })

frontend/common/utils/format.ts

@@ -165,12 +165,11 @@ const Format = {
       return str
     }
 
-    let result = str
     for (let i = 0; i < Utils.accents.length; i++) {
-      result = result.replace(Utils.accents[i].letters, Utils.accents[i].base)
+      str = str.replace(Utils.accents[i].letters, Utils.accents[i].base)
     }
 
-    return result
+    return str
   },
 
   shortenNumber(number: number): string {

frontend/jest.config.js

@@ -16,14 +16,15 @@ module.exports = {
   },
   preset: 'ts-jest',
   roots: ['<rootDir>'],
+  setupFiles: ['<rootDir>/jest.setup.js'],
   testEnvironment: 'node',
   testMatch: ['**/__tests__/**/*.test.ts', '**/*.test.ts'],
   transform: {
     '^.+\\.(js|jsx)$': 'babel-jest',
     '^.+\\.(ts|tsx)$': [
       'ts-jest',
       {
-        tsconfig: 'tsconfig.json',
+        tsconfig: 'tsconfig.jest.json',
       },
     ],
   },

frontend/jest.setup.js

@@ -0,0 +1,3 @@
+// Set up global Utils object for tests
+// This makes Utils.accents and Utils.isInPast available globally as they are in the app
+global.Utils = require('./common/utils/base/_utils')

frontend/tsconfig.jest.json

@@ -0,0 +1,6 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "jsx": "react"
+  }
+}