diff --git a/Unittests.ts b/Unittests.ts
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--- /dev/null
+++ b/Unittests.ts
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+// Jest unit tests for the AudioManager class focusing on functionality and performance
+
+import AudioManager from './src/audioManager'
+import { performance } from 'node:perf_hooks'
+
+// Mocking @discordjs/voice
+jest.mock('@discordjs/voice', () => {
+    return {
+        joinVoiceChannel: jest.fn(() => ({
+            subscribe: jest.fn(),
+            destroy: jest.fn(),
+            setMaxListeners: jest.fn()
+        })),
+        createAudioPlayer: jest.fn(() => ({
+            play: jest.fn(),
+            pause: jest.fn(),
+            unpause: jest.fn()
+        })),
+        createAudioResource: jest.fn(() => ({
+            volume: { setVolume: jest.fn() }
+        }))
+    }
+})
+
+type VoiceConnectionDataModel = {
+    VoiceChannelId: string
+    GuildId: string
+    VoiceAdapter: any
+}
+
+type VoiceAudioDataModel = {
+    ResourceType: 'Link' | 'File'
+    Resource: string | any
+}
+
+const connectionData: VoiceConnectionDataModel = {
+    VoiceChannelId: '1',
+    GuildId: '1',
+    VoiceAdapter: jest.fn()
+}
+
+const audioDataFile: VoiceAudioDataModel = {
+    ResourceType: 'File',
+    Resource: 'sound.mp3'
+}
+
+const audioDataLink: VoiceAudioDataModel = {
+    ResourceType: 'Link',
+    Resource: 'https://example.com/sound.mp3'
+}
+
+describe('AudioManager', () => {
+    beforeEach(() => jest.clearAllMocks())
+
+    test('CreateConnection initializes voice connection', () => {
+        const manager = new AudioManager(connectionData, audioDataFile)
+        const start = performance.now()
+        manager.CreateConnection()
+        const duration = performance.now() - start
+        expect(require('@discordjs/voice').joinVoiceChannel).toHaveBeenCalled()
+        expect(duration).toBeLessThan(50)
+    })
+
+    test('PlayAudioOnConnection loads file resource', () => {
+        const manager = new AudioManager(connectionData, audioDataFile)
+        manager.CreateConnection()
+        manager.PlayAudioOnConnection()
+        const voice = require('@discordjs/voice')
+        expect(voice.createAudioResource).toHaveBeenCalled()
+        expect(voice.createAudioPlayer).toHaveBeenCalled()
+        expect(manager['IsAudioPlaying']).toBe(true)
+    })
+
+    test('PlayAudioOnConnection loads link resource', () => {
+        const manager = new AudioManager(connectionData, audioDataLink)
+        manager.CreateConnection()
+        manager.PlayAudioOnConnection()
+        const voice = require('@discordjs/voice')
+        expect(voice.createAudioResource).toHaveBeenCalled()
+    })
+
+    test('StopAudioOnConnection resets connection', () => {
+        const manager = new AudioManager(connectionData, audioDataFile)
+        manager.CreateConnection()
+        manager.PlayAudioOnConnection()
+        manager.StopAudioOnConnection()
+        const voice = require('@discordjs/voice')
+        expect(voice.joinVoiceChannel).toHaveBeenCalledTimes(2)
+    })
+
+    test('Pause and Resume audio', () => {
+        const manager = new AudioManager(connectionData, audioDataFile)
+        manager.CreateConnection()
+        manager.PlayAudioOnConnection()
+        manager.PauseAudio()
+        manager.ResumeAudio()
+        const voice = require('@discordjs/voice')
+        const player = voice.createAudioPlayer.mock.results[0].value
+        expect(player.pause).toHaveBeenCalled()
+        expect(player.unpause).toHaveBeenCalled()
+    })
+
+    test('SetVolume validates range', () => {
+        const manager = new AudioManager(connectionData, audioDataFile)
+        manager.CreateConnection()
+        manager.PlayAudioOnConnection()
+        manager.SetVolume(50)
+        const res = require('@discordjs/voice').createAudioResource.mock.results[0].value
+        expect(res.volume.setVolume).toHaveBeenCalledWith(0.5)
+        expect(() => manager.SetVolume(101)).toThrow()
+    })
+
+    test('DestroyConnection clears flags', () => {
+        const manager = new AudioManager(connectionData, audioDataFile)
+        manager.CreateConnection()
+        manager.DestroyConnection()
+        const voice = require('@discordjs/voice')
+        const connection = voice.joinVoiceChannel.mock.results[0].value
+        expect(connection.destroy).toHaveBeenCalled()
+        expect(manager['IsActive']).toBe(false)
+    })
+})
diff --git a/jest.config.js b/jest.config.js
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+++ b/jest.config.js
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+module.exports = {
+  preset: 'ts-jest',
+  testEnvironment: 'node',
+  testMatch: ['**/Unittests.ts'],
+  transform: {
+    '^.+\\.tsx?$': 'ts-jest'
+  }
+};