Discord Plugin Testing Guide

This guide covers testing strategies, patterns, and best practices for the @elizaos/plugin-discord package.

Test Environment Setup

Prerequisites

Test Discord Server
- Create a dedicated Discord server for testing
- Set up test channels (text, voice, etc.)
- Configure appropriate permissions
Test Bot Application
- Create a separate bot application for testing
- Generate test credentials
- Add bot to test server with full permissions
Environment Configuration

# .env.test
DISCORD_APPLICATION_ID=test_application_id
DISCORD_API_TOKEN=test_bot_token
DISCORD_TEST_CHANNEL_ID=test_text_channel_id
DISCORD_TEST_VOICE_CHANNEL_ID=test_voice_channel_id
DISCORD_TEST_SERVER_ID=test_server_id

# Test user for interactions
DISCORD_TEST_USER_ID=test_user_id

Unit Testing

Testing Message Manager

import { describe, it, expect, beforeEach, vi } from 'vitest';
import { MessageManager } from '@elizaos/plugin-discord';
import { Client, Message, TextChannel } from 'discord.js';

describe('MessageManager', () => {
  let messageManager: MessageManager;
  let mockClient: Client;
  let mockRuntime: any;
  
  beforeEach(() => {
    // Mock Discord.js client
    mockClient = {
      channels: {
        cache: new Map(),
        fetch: vi.fn()
      },
      user: { id: 'bot-id' }
    } as any;
    
    // Mock runtime
    mockRuntime = {
      processMessage: vi.fn(),
      character: { name: 'TestBot' },
      logger: { info: vi.fn(), error: vi.fn() }
    };
    
    messageManager = new MessageManager(mockClient, mockRuntime);
  });
  
  describe('handleMessage', () => {
    it('should ignore bot messages', async () => {
      const mockMessage = {
        author: { bot: true },
        content: 'Test message'
      } as any;
      
      await messageManager.handleMessage(mockMessage);
      
      expect(mockRuntime.processMessage).not.toHaveBeenCalled();
    });
    
    it('should process user messages', async () => {
      const mockMessage = {
        author: { bot: false, id: 'user-123' },
        content: 'Hello bot',
        channel: { id: 'channel-123' },
        guild: { id: 'guild-123' }
      } as any;
      
      mockRuntime.processMessage.mockResolvedValue({
        text: 'Hello user!'
      });
      
      await messageManager.handleMessage(mockMessage);
      
      expect(mockRuntime.processMessage).toHaveBeenCalledWith(
        expect.objectContaining({
          content: { text: 'Hello bot' },
          channelId: 'channel-123',
          serverId: 'guild-123'
        })
      );
    });
    
    it('should handle attachments', async () => {
      const mockMessage = {
        author: { bot: false, id: 'user-123' },
        content: 'Check this image',
        attachments: new Map([
          ['123', {
            url: 'https://example.com/image.png',
            contentType: 'image/png',
            name: 'image.png'
          }]
        ]),
        channel: { id: 'channel-123' }
      } as any;
      
      await messageManager.handleMessage(mockMessage);
      
      expect(mockRuntime.processMessage).toHaveBeenCalledWith(
        expect.objectContaining({
          attachments: expect.arrayContaining([
            expect.objectContaining({
              url: 'https://example.com/image.png',
              contentType: 'image/png'
            })
          ])
        })
      );
    });
  });
});

Testing Voice Manager

import { VoiceManager } from '@elizaos/plugin-discord';
import { VoiceChannel, VoiceConnection } from '@discordjs/voice';

describe('VoiceManager', () => {
  let voiceManager: VoiceManager;
  let mockChannel: VoiceChannel;
  
  beforeEach(() => {
    voiceManager = new VoiceManager(mockClient, mockRuntime);
    
    mockChannel = {
      id: 'voice-123',
      name: 'Test Voice',
      guild: { id: 'guild-123' },
      joinable: true
    } as any;
  });
  
  describe('joinChannel', () => {
    it('should create voice connection', async () => {
      const connection = await voiceManager.joinChannel(mockChannel);
      
      expect(connection).toBeDefined();
      expect(voiceManager.getConnection('guild-123')).toBe(connection);
    });
    
    it('should handle connection errors', async () => {
      mockChannel.joinable = false;
      
      await expect(voiceManager.joinChannel(mockChannel))
        .rejects
        .toThrow('Cannot join voice channel');
    });
  });
  
  describe('audio processing', () => {
    it('should process audio stream', async () => {
      const mockStream = createMockAudioStream();
      const transcribeSpy = vi.spyOn(voiceManager, 'transcribeAudio');
      
      await voiceManager.processAudioStream(mockStream, 'user-123');
      
      expect(transcribeSpy).toHaveBeenCalled();
    });
  });
});

Integration Testing

Testing Discord Service

import { DiscordService } from '@elizaos/plugin-discord';
import { AgentRuntime } from '@elizaos/core';

describe('DiscordService Integration', () => {
  let service: DiscordService;
  let runtime: AgentRuntime;
  
  beforeAll(async () => {
    runtime = new AgentRuntime({
      character: {
        name: 'TestBot',
        clients: ['discord']
      },
      settings: {
        DISCORD_API_TOKEN: process.env.DISCORD_TEST_TOKEN,
        DISCORD_APPLICATION_ID: process.env.DISCORD_TEST_APP_ID
      }
    });
    
    service = new DiscordService(runtime);
    await service.start();
  });
  
  afterAll(async () => {
    await service.stop();
  });
  
  it('should connect to Discord', async () => {
    expect(service.client).toBeDefined();
    expect(service.client.isReady()).toBe(true);
  });
  
  it('should handle slash commands', async () => {
    const testChannel = await service.client.channels.fetch(
      process.env.DISCORD_TEST_CHANNEL_ID
    );
    
    // Simulate slash command
    const interaction = createMockInteraction({
      commandName: 'test',
      channel: testChannel
    });
    
    await service.handleInteraction(interaction);
    
    // Verify response was sent
    expect(interaction.reply).toHaveBeenCalled();
  });
});

Testing Message Flow

describe('Message Flow Integration', () => {
  it('should process message end-to-end', async () => {
    const testMessage = await sendTestMessage(
      'Hello bot!',
      process.env.DISCORD_TEST_CHANNEL_ID
    );
    
    // Wait for bot response
    const response = await waitForBotResponse(testMessage.channel, 5000);
    
    expect(response).toBeDefined();
    expect(response.content).toContain('Hello');
  });
  
  it('should handle media attachments', async () => {
    const testMessage = await sendTestMessageWithImage(
      'What is this?',
      'test-image.png',
      process.env.DISCORD_TEST_CHANNEL_ID
    );
    
    const response = await waitForBotResponse(testMessage.channel, 10000);
    
    expect(response.content).toMatch(/I can see|image shows/i);
  });
});

E2E Testing

Complete Bot Test Suite

import { DiscordTestSuite } from '@elizaos/plugin-discord/tests';

describe('Discord Bot E2E Tests', () => {
  const suite = new DiscordTestSuite({
    testChannelId: process.env.DISCORD_TEST_CHANNEL_ID,
    testVoiceChannelId: process.env.DISCORD_TEST_VOICE_CHANNEL_ID,
    testUserId: process.env.DISCORD_TEST_USER_ID
  });
  
  beforeAll(async () => {
    await suite.setup();
  });
  
  afterAll(async () => {
    await suite.cleanup();
  });
  
  describe('Text Interactions', () => {
    it('should respond to messages', async () => {
      const result = await suite.testMessageResponse({
        content: 'Hello!',
        expectedPattern: /hello|hi|hey/i
      });
      
      expect(result.success).toBe(true);
    });
    
    it('should handle mentions', async () => {
      const result = await suite.testMention({
        content: 'Hey bot, how are you?',
        expectedResponse: true
      });
      
      expect(result.responded).toBe(true);
    });
  });
  
  describe('Voice Interactions', () => {
    it('should join voice channel', async () => {
      const result = await suite.testVoiceJoin();
      expect(result.connected).toBe(true);
    });
    
    it('should transcribe voice', async () => {
      const result = await suite.testVoiceTranscription({
        audioFile: 'test-audio.mp3',
        expectedTranscript: 'hello world'
      });
      
      expect(result.transcript).toContain('hello');
    });
  });
  
  describe('Slash Commands', () => {
    it('should execute slash commands', async () => {
      const result = await suite.testSlashCommand({
        command: 'chat',
        options: { message: 'Test message' }
      });
      
      expect(result.success).toBe(true);
    });
  });
});

Performance Testing

Load Testing

import { performance } from 'perf_hooks';

describe('Performance Tests', () => {
  it('should handle multiple concurrent messages', async () => {
    const messageCount = 100;
    const startTime = performance.now();
    
    const promises = Array(messageCount).fill(0).map((_, i) =>
      sendTestMessage(`Test message ${i}`, testChannelId)
    );
    
    await Promise.all(promises);
    
    const endTime = performance.now();
    const totalTime = endTime - startTime;
    const avgTime = totalTime / messageCount;
    
    expect(avgTime).toBeLessThan(1000); // Less than 1s per message
  });
  
  it('should maintain voice connection stability', async () => {
    const duration = 60000; // 1 minute
    const startTime = Date.now();
    
    await voiceManager.joinChannel(testVoiceChannel);
    
    // Monitor connection status
    const checkInterval = setInterval(() => {
      const connection = voiceManager.getConnection(testServerId);
      expect(connection?.state.status).toBe('ready');
    }, 1000);
    
    await new Promise(resolve => setTimeout(resolve, duration));
    clearInterval(checkInterval);
    
    const connection = voiceManager.getConnection(testServerId);
    expect(connection?.state.status).toBe('ready');
  });
});

Memory Usage Testing

describe('Memory Usage', () => {
  it('should not leak memory on message processing', async () => {
    const iterations = 1000;
    const measurements = [];
    
    for (let i = 0; i < iterations; i++) {
      if (i % 100 === 0) {
        global.gc(); // Force garbage collection
        const usage = process.memoryUsage();
        measurements.push(usage.heapUsed);
      }
      
      await messageManager.handleMessage(createMockMessage());
    }
    
    // Check for memory growth
    const firstMeasurement = measurements[0];
    const lastMeasurement = measurements[measurements.length - 1];
    const growth = lastMeasurement - firstMeasurement;
    
    // Allow some growth but not excessive
    expect(growth).toBeLessThan(50 * 1024 * 1024); // 50MB
  });
});

Mock Utilities

Discord.js Mocks

export function createMockMessage(options: Partial<Message> = {}): Message {
  return {
    id: options.id || 'mock-message-id',
    content: options.content || 'Mock message',
    author: options.author || {
      id: 'mock-user-id',
      username: 'MockUser',
      bot: false
    },
    channel: options.channel || createMockTextChannel(),
    guild: options.guild || createMockGuild(),
    createdTimestamp: Date.now(),
    reply: vi.fn(),
    react: vi.fn(),
    ...options
  } as any;
}

export function createMockTextChannel(
  options: Partial<TextChannel> = {}
): TextChannel {
  return {
    id: options.id || 'mock-channel-id',
    name: options.name || 'mock-channel',
    type: ChannelType.GuildText,
    send: vi.fn(),
    guild: options.guild || createMockGuild(),
    ...options
  } as any;
}

export function createMockInteraction(
  options: any = {}
): ChatInputCommandInteraction {
  return {
    id: 'mock-interaction-id',
    commandName: options.commandName || 'test',
    options: {
      getString: vi.fn((name) => options.options?.[name]),
      getInteger: vi.fn((name) => options.options?.[name])
    },
    reply: vi.fn(),
    deferReply: vi.fn(),
    editReply: vi.fn(),
    channel: options.channel || createMockTextChannel(),
    ...options
  } as any;
}

Test Helpers

export async function waitForBotResponse(
  channel: TextChannel,
  timeout = 5000
): Promise<Message | null> {
  return new Promise((resolve) => {
    const timer = setTimeout(() => {
      collector.stop();
      resolve(null);
    }, timeout);
    
    const collector = channel.createMessageCollector({
      filter: (m) => m.author.bot,
      max: 1,
      time: timeout
    });
    
    collector.on('collect', (message) => {
      clearTimeout(timer);
      resolve(message);
    });
  });
}

export async function sendTestMessage(
  content: string,
  channelId: string
): Promise<Message> {
  const channel = await client.channels.fetch(channelId) as TextChannel;
  return await channel.send(content);
}

export async function simulateVoiceActivity(
  connection: VoiceConnection,
  audioFile: string,
  userId: string
): Promise<void> {
  const resource = createAudioResource(audioFile);
  const player = createAudioPlayer();
  
  connection.subscribe(player);
  player.play(resource);
  
  // Simulate user speaking
  connection.receiver.speaking.on('start', userId);
  
  await new Promise((resolve) => {
    player.on(AudioPlayerStatus.Idle, resolve);
  });
}

Debug Logging

Enable Detailed Logging

// Enable debug logging for tests
process.env.DEBUG = 'eliza:discord:*';

// Custom test logger
export class TestLogger {
  private logs: Array<{ level: string; message: string; timestamp: Date }> = [];
  
  log(level: string, message: string, ...args: any[]) {
    this.logs.push({
      level,
      message: `${message} ${args.join(' ')}`,
      timestamp: new Date()
    });
    
    if (process.env.VERBOSE_TESTS) {
      console.log(`[${level}] ${message}`, ...args);
    }
  }
  
  getLogs(level?: string) {
    return level 
      ? this.logs.filter(l => l.level === level)
      : this.logs;
  }
  
  clear() {
    this.logs = [];
  }
}

Test Configuration

vitest.config.ts

import { defineConfig } from 'vitest/config';

export default defineConfig({
  test: {
    globals: true,
    environment: 'node',
    setupFiles: ['./tests/setup.ts'],
    testTimeout: 30000,
    hookTimeout: 30000,
    coverage: {
      provider: 'v8',
      reporter: ['text', 'json', 'html'],
      exclude: [
        'node_modules',
        'tests',
        '**/*.test.ts'
      ]
    }
  }
});

Test Setup

// tests/setup.ts
import { config } from 'dotenv';
import { vi } from 'vitest';

// Load test environment
config({ path: '.env.test' });

// Global test utilities
global.createMockRuntime = () => ({
  processMessage: vi.fn(),
  character: { name: 'TestBot' },
  logger: {
    info: vi.fn(),
    error: vi.fn(),
    warn: vi.fn(),
    debug: vi.fn()
  },
  getSetting: vi.fn((key) => process.env[key]),
  getService: vi.fn()
});

// Cleanup after tests
afterAll(async () => {
  // Close all connections
  await cleanup();
});

Continuous Integration

GitHub Actions Workflow

name: Discord Plugin Tests

on:
  push:
    paths:
      - 'packages/plugin-discord/**'
  pull_request:
    paths:
      - 'packages/plugin-discord/**'

jobs:
  test:
    runs-on: ubuntu-latest
    
    steps:
    - uses: actions/checkout@v3
    
    - name: Setup Node.js
      uses: actions/setup-node@v3
      with:
        node-version: 20
        
    - name: Install dependencies
      run: bun install
      
    - name: Run unit tests
      run: bun test packages/plugin-discord --coverage
      env:
        DISCORD_API_TOKEN: ${{ secrets.TEST_DISCORD_TOKEN }}
        DISCORD_APPLICATION_ID: ${{ secrets.TEST_DISCORD_APP_ID }}
        
    - name: Upload coverage
      uses: codecov/codecov-action@v3
      with:
        files: ./coverage/coverage-final.json

Best Practices

Test Isolation
- Each test should be independent
- Clean up resources after tests
- Use separate test channels/servers
Mock External Services
- Mock Discord API calls for unit tests
- Use real Discord for integration tests only
- Mock transcription/vision services
Error Scenarios
- Test network failures
- Test permission errors
- Test rate limiting
Performance Monitoring
- Track response times
- Monitor memory usage
- Check for connection stability
Security Testing
- Test token validation
- Test permission checks
- Test input sanitization

Getting Started

Core Plugins

LLM Providers

Platform Integrations

Testing Guide

Discord Plugin Testing Guide

Test Environment Setup

Prerequisites

Unit Testing

Testing Message Manager

Testing Voice Manager

Integration Testing

Testing Discord Service

Testing Message Flow

E2E Testing

Complete Bot Test Suite

Performance Testing

Load Testing

Memory Usage Testing

Mock Utilities

Discord.js Mocks

Test Helpers

Debug Logging

Enable Detailed Logging

Test Configuration

vitest.config.ts

Test Setup

Continuous Integration

GitHub Actions Workflow

Best Practices

Getting Started

Core Plugins

LLM Providers

Platform Integrations

​Discord Plugin Testing Guide

​Test Environment Setup

​Prerequisites

​Unit Testing

​Testing Message Manager

​Testing Voice Manager

​Integration Testing

​Testing Discord Service

​Testing Message Flow

​E2E Testing

​Complete Bot Test Suite

​Performance Testing

​Load Testing

​Memory Usage Testing

​Mock Utilities

​Discord.js Mocks

​Test Helpers

​Debug Logging

​Enable Detailed Logging

​Test Configuration

​vitest.config.ts

​Test Setup

​Continuous Integration

​GitHub Actions Workflow

​Best Practices

Discord Plugin Testing Guide

Test Environment Setup

Prerequisites

Unit Testing

Testing Message Manager

Testing Voice Manager

Integration Testing

Testing Discord Service

Testing Message Flow

E2E Testing

Complete Bot Test Suite

Performance Testing

Load Testing

Memory Usage Testing

Mock Utilities

Discord.js Mocks

Test Helpers

Debug Logging

Enable Detailed Logging

Test Configuration

vitest.config.ts

Test Setup

Continuous Integration

GitHub Actions Workflow

Best Practices