diff --git a/src/pages/tools/string/unicode/unicode.service.test.ts b/src/pages/tools/string/unicode/unicode.service.test.ts
index 97f90a3..1d43163 100644
--- a/src/pages/tools/string/unicode/unicode.service.test.ts
+++ b/src/pages/tools/string/unicode/unicode.service.test.ts
@@ -2,39 +2,39 @@ import { expect, describe, it } from 'vitest';
 import { unicode } from './service';
 
 describe('unicode', () => {
-  it('should encode a English string to lowercase hex correctly', () => {
+  it('should encode an English string to lowercase hex correctly', () => {
     const input = 'Hello, World!';
-    const result = unicode(input, true, false);
+    const result = unicode(input, { mode: 'encode', uppercase: false });
     expect(result).toBe(
       '\\u0048\\u0065\\u006c\\u006c\\u006f\\u002c\\u0020\\u0057\\u006f\\u0072\\u006c\\u0064\\u0021'
     );
   });
 
-  it('should encode a English string to uppercase hex correctly', () => {
+  it('should encode an English string to uppercase hex correctly', () => {
     const input = 'Hello, World!';
-    const result = unicode(input, true, true);
+    const result = unicode(input, { mode: 'encode', uppercase: true });
     expect(result).toBe(
       '\\u0048\\u0065\\u006C\\u006C\\u006F\\u002C\\u0020\\u0057\\u006F\\u0072\\u006C\\u0064\\u0021'
     );
   });
 
-  it('should decode a English lowercase hex string correctly', () => {
+  it('should decode an English lowercase hex string correctly', () => {
     const input =
       '\\u0048\\u0065\\u006c\\u006c\\u006f\\u002c\\u0020\\u0057\\u006f\\u0072\\u006c\\u0064\\u0021';
-    const result = unicode(input, false, false);
+    const result = unicode(input, { mode: 'decode', uppercase: false });
     expect(result).toBe('Hello, World!');
   });
 
-  it('should decode a English uppercase hex string correctly', () => {
+  it('should decode an English uppercase hex string correctly', () => {
     const input =
       '\\u0048\\u0065\\u006C\\u006C\\u006F\\u002C\\u0020\\u0057\\u006F\\u0072\\u006C\\u0064\\u0021';
-    const result = unicode(input, false, false);
+    const result = unicode(input, { mode: 'decode', uppercase: false });
     expect(result).toBe('Hello, World!');
   });
 
   it('should encode a Korean string to lowercase hex correctly', () => {
     const input = '안녕하세요, 세계!';
-    const result = unicode(input, true, false);
+    const result = unicode(input, { mode: 'encode', uppercase: false });
     expect(result).toBe(
       '\\uc548\\ub155\\ud558\\uc138\\uc694\\u002c\\u0020\\uc138\\uacc4\\u0021'
     );
@@ -42,7 +42,7 @@ describe('unicode', () => {
 
   it('should encode a Korean string to uppercase hex correctly', () => {
     const input = '안녕하세요, 세계!';
-    const result = unicode(input, true, true);
+    const result = unicode(input, { mode: 'encode', uppercase: true });
     expect(result).toBe(
       '\\uC548\\uB155\\uD558\\uC138\\uC694\\u002C\\u0020\\uC138\\uACC4\\u0021'
     );
@@ -51,20 +51,20 @@ describe('unicode', () => {
   it('should decode a Korean lowercase hex string correctly', () => {
     const input =
       '\\uc548\\ub155\\ud558\\uc138\\uc694\\u002c\\u0020\\uc138\\uacc4\\u0021';
-    const result = unicode(input, false, false);
+    const result = unicode(input, { mode: 'decode', uppercase: false });
     expect(result).toBe('안녕하세요, 세계!');
   });
 
   it('should decode a Korean uppercase hex string correctly', () => {
     const input =
       '\\uC548\\uB155\\uD558\\uC138\\uC694\\u002C\\u0020\\uC138\\uACC4\\u0021';
-    const result = unicode(input, false, false);
+    const result = unicode(input, { mode: 'decode', uppercase: false });
     expect(result).toBe('안녕하세요, 세계!');
   });
 
   it('should encode a Japanese string to lowercase hex correctly', () => {
     const input = 'こんにちは、世界！';
-    const result = unicode(input, true, false);
+    const result = unicode(input, { mode: 'encode', uppercase: false });
     expect(result).toBe(
       '\\u3053\\u3093\\u306b\\u3061\\u306f\\u3001\\u4e16\\u754c\\uff01'
     );
@@ -72,7 +72,7 @@ describe('unicode', () => {
 
   it('should encode a Japanese string to uppercase hex correctly', () => {
     const input = 'こんにちは、世界！';
-    const result = unicode(input, true, true);
+    const result = unicode(input, { mode: 'encode', uppercase: true });
     expect(result).toBe(
       '\\u3053\\u3093\\u306B\\u3061\\u306F\\u3001\\u4E16\\u754C\\uFF01'
     );
@@ -81,44 +81,44 @@ describe('unicode', () => {
   it('should decode a Japanese lowercase hex string correctly', () => {
     const input =
       '\\u3053\\u3093\\u306b\\u3061\\u306f\\u3001\\u4e16\\u754c\\uff01';
-    const result = unicode(input, false, false);
+    const result = unicode(input, { mode: 'decode', uppercase: false });
     expect(result).toBe('こんにちは、世界！');
   });
 
   it('should decode a Japanese uppercase hex string correctly', () => {
     const input =
       '\\u3053\\u3093\\u306B\\u3061\\u306F\\u3001\\u4E16\\u754C\\uFF01';
-    const result = unicode(input, false, false);
+    const result = unicode(input, { mode: 'decode', uppercase: false });
     expect(result).toBe('こんにちは、世界！');
   });
 
   it('should encode a Chinese string to lowercase hex correctly', () => {
     const input = '你好，世界！';
-    const result = unicode(input, true, false);
+    const result = unicode(input, { mode: 'encode', uppercase: false });
     expect(result).toBe('\\u4f60\\u597d\\uff0c\\u4e16\\u754c\\uff01');
   });
 
   it('should encode a Chinese string to uppercase hex correctly', () => {
     const input = '你好，世界！';
-    const result = unicode(input, true, true);
+    const result = unicode(input, { mode: 'encode', uppercase: true });
     expect(result).toBe('\\u4F60\\u597D\\uFF0C\\u4E16\\u754C\\uFF01');
   });
 
   it('should decode a Chinese lowercase hex string correctly', () => {
     const input = '\\u4f60\\u597d\\uff0c\\u4e16\\u754c\\uff01';
-    const result = unicode(input, false, false);
+    const result = unicode(input, { mode: 'decode', uppercase: false });
     expect(result).toBe('你好，世界！');
   });
 
   it('should decode a Chinese uppercase hex string correctly', () => {
     const input = '\\u4F60\\u597D\\uFF0C\\u4E16\\u754C\\uFF01';
-    const result = unicode(input, false, false);
+    const result = unicode(input, { mode: 'decode', uppercase: false });
     expect(result).toBe('你好，世界！');
   });
 
   it('should encode a Russian string to lowercase hex correctly', () => {
     const input = 'Привет, мир!';
-    const result = unicode(input, true, false);
+    const result = unicode(input, { mode: 'encode', uppercase: false });
     expect(result).toBe(
       '\\u041f\\u0440\\u0438\\u0432\\u0435\\u0442\\u002c\\u0020\\u043c\\u0438\\u0440\\u0021'
     );
@@ -126,7 +126,7 @@ describe('unicode', () => {
 
   it('should encode a Russian string to uppercase hex correctly', () => {
     const input = 'Привет, мир!';
-    const result = unicode(input, true, true);
+    const result = unicode(input, { mode: 'encode', uppercase: true });
     expect(result).toBe(
       '\\u041F\\u0440\\u0438\\u0432\\u0435\\u0442\\u002C\\u0020\\u043C\\u0438\\u0440\\u0021'
     );
@@ -135,20 +135,20 @@ describe('unicode', () => {
   it('should decode a Russian lowercase hex string correctly', () => {
     const input =
       '\\u041f\\u0440\\u0438\\u0432\\u0435\\u0442\\u002c\\u0020\\u043c\\u0438\\u0440\\u0021';
-    const result = unicode(input, false, false);
+    const result = unicode(input, { mode: 'decode', uppercase: false });
     expect(result).toBe('Привет, мир!');
   });
 
   it('should decode a Russian uppercase hex string correctly', () => {
     const input =
       '\\u041F\\u0440\\u0438\\u0432\\u0435\\u0442\\u002C\\u0020\\u043C\\u0438\\u0440\\u0021';
-    const result = unicode(input, false, false);
+    const result = unicode(input, { mode: 'decode', uppercase: false });
     expect(result).toBe('Привет, мир!');
   });
 
   it('should encode a Spanish string to lowercase hex correctly', () => {
     const input = '¡Hola, Mundo!';
-    const result = unicode(input, true, false);
+    const result = unicode(input, { mode: 'encode', uppercase: false });
     expect(result).toBe(
       '\\u00a1\\u0048\\u006f\\u006c\\u0061\\u002c\\u0020\\u004d\\u0075\\u006e\\u0064\\u006f\\u0021'
     );
@@ -156,7 +156,7 @@ describe('unicode', () => {
 
   it('should encode a Spanish string to uppercase hex correctly', () => {
     const input = '¡Hola, Mundo!';
-    const result = unicode(input, true, true);
+    const result = unicode(input, { mode: 'encode', uppercase: true });
     expect(result).toBe(
       '\\u00A1\\u0048\\u006F\\u006C\\u0061\\u002C\\u0020\\u004D\\u0075\\u006E\\u0064\\u006F\\u0021'
     );
@@ -165,14 +165,14 @@ describe('unicode', () => {
   it('should decode a Spanish lowercase hex string correctly', () => {
     const input =
       '\\u00a1\\u0048\\u006f\\u006c\\u0061\\u002c\\u0020\\u004d\\u0075\\u006e\\u0064\\u006f\\u0021';
-    const result = unicode(input, false, false);
+    const result = unicode(input, { mode: 'decode', uppercase: false });
     expect(result).toBe('¡Hola, Mundo!');
   });
 
   it('should decode a Spanish uppercase hex string correctly', () => {
     const input =
       '\\u00A1\\u0048\\u006F\\u006C\\u0061\\u002C\\u0020\\u004D\\u0075\\u006E\\u0064\\u006F\\u0021';
-    const result = unicode(input, false, false);
+    const result = unicode(input, { mode: 'decode', uppercase: false });
     expect(result).toBe('¡Hola, Mundo!');
   });
 });