agent-desktop/tests/unit/channels

Channel Testing Guide

Testing Architecture

tests/
├── contract/channels/          # ⭐ Contract Tests (Required)
│   ├── __init__.py            # ChannelContractTest base class
│   ├── test_console_contract.py   # Simple Channel reference
│   ├── test_dingtalk_contract.py  # Complex Channel reference
│   ├── test_feishu_contract.py    # Complex Channel reference
│   └── test_*_contract.py         # All 11 Channels covered (0 missing)
│
└── unit/channels/              # Unit Tests (All Channels)
    ├── README.md               # This file
    ├── test_base_core.py       # BaseChannel internal logic (68 tests)
    ├── test_console.py         # ConsoleChannel unit tests (26 tests)
    ├── test_dingtalk.py        # DingTalkChannel unit tests (159 tests)
    ├── test_discord.py         # DiscordChannel unit tests (55 tests)
    ├── test_feishu.py          # FeishuChannel unit tests (120 tests)
    ├── test_imessage.py        # IMessageChannel unit tests (37 tests)
    ├── test_matrix.py          # MatrixChannel unit tests (55 tests)
    ├── test_mattermost.py      # MattermostChannel unit tests (82 tests)
    ├── test_mqtt.py            # MQTTChannel unit tests (50 tests)
    ├── test_onebot_channel.py  # OneBotChannel unit tests (53 tests)
    ├── test_qq.py              # QQChannel unit tests (116 tests)
    ├── test_telegram.py        # TelegramChannel unit tests (93 tests)
    ├── test_voice.py           # VoiceChannel unit tests (37 tests)
    ├── test_wecom.py           # WecomChannel unit tests (69 tests)
    ├── test_wechat.py          # WeChatChannel unit tests (78 tests)
    └── test_xiaoyi.py          # XiaoyiChannel unit tests (57 tests)

Contract Tests vs Unit Tests

Type	Location	Purpose	Status
Contract Tests	tests/contract/channels/	Verify external interface compatibility	✅ 128 tests, CI hard gate
Unit Tests	tests/unit/channels/	Verify internal logic correctness	✅ 1200+ tests, CI enforcement

Both test types are required to pass in CI.

Unit Test Coverage by Channel

Channel	Test Count	Lines	Complexity	Status
BaseChannel (Core)	68	1,390	Core Logic	✅ Complete
DingTalk	159	3,708	High	✅ Complete
Feishu	120	2,652	High	✅ Complete
QQ	116	2,096	High	✅ Complete
Telegram	93	1,798	Medium-High	✅ Complete
Mattermost	82	1,990	Medium-High	✅ Complete
WeChat	78	1,617	Medium	✅ Complete
Wecom	69	1,504	Medium	✅ Complete
Base (test_base_core.py)	68	1,390	Core	✅ Complete
Console	26	567	Simple	✅ Complete
Xiaoyi	57	1,219	Medium	✅ Complete
Discord	55	945	Medium	✅ Complete
Matrix	55	1,068	Medium	✅ Complete
OneBot	53	756	Medium	✅ Complete
MQTT	50	922	Medium	✅ Complete
IMessage	37	1,007	Simple-Medium	✅ Complete
Voice	37	651	Simple	✅ Complete

Total: 1,200+ unit tests across 16 test files

Local Development

# Run all contract tests (required)
pytest tests/contract/channels/ -v

# Run all unit tests
pytest tests/unit/channels/ -v

# Run specific Channel unit tests
pytest tests/unit/channels/test_dingtalk.py -v
pytest tests/unit/channels/test_feishu.py -v

# Run with coverage
pytest tests/unit/channels/ \
    --cov=src/copaw/app/channels \
    --cov-report=term-missing

# Check contract coverage status
make check-contracts

Adding New Channel Tests

For Contract Tests

All Channels already have contract tests. To add a new Channel:

# 1. Copy the official template
cp tests/contract/channels/test_console_contract.py \
   tests/contract/channels/test_yourchannel_contract.py

# 2. Modify class name and create_instance()

# 3. Local verification
make check-contracts  # Should show your Channel in tested list

For Unit Tests

Create a new test file following the existing pattern:

# tests/unit/channels/test_yourchannel.py
"""Unit tests for YourChannel implementation."""

import pytest
from src.copaw.app.channels.your_channel import YourChannel


class TestYourChannel:
    """Test suite for YourChannel."""

    def test_initialization(self):
        """Test channel can be initialized."""
        channel = YourChannel()
        assert channel is not None

    def test_start_stop(self):
        """Test channel lifecycle."""
        # Implementation here
        pass

    # Add more tests...

CI/CD Integration

All tests run in the CI pipeline with the following gates:

Phase	Test Type	Threshold	Gate Type	Status
1	Contract Tests	100% (128/128)	🔴 Hard Gate	⚠️ Temporarily skipped (Pydantic issue)
2	Unit Tests	All must pass	🔴 Hard Gate	✅ Active
3	Coverage	Minimum threshold	🟡 Soft Gate	✅ Non-blocking with warnings

Hard Gate: Failure blocks PR merge Soft Gate: Warning only, non-blocking (continue-on-error)

Four-Layer Protection (Contract Tests)

Layer 1: Abstract Method Check
├── test_no_abstract_methods_remaining
└── Catches: BaseChannel adds @abstractmethod

Layer 2: Instantiation Check
├── test_no_abstractmethods__in_instance
└── Catches: Cannot create instance (unimplemented methods)

Layer 3: Method Override Check
├── test_required_methods_not_raising_not_implemented
└── Catches: Method still raises NotImplementedError

Layer 4: Signature Compatibility Check
├── test_start_method_signature_compatible
├── test_stop_method_signature_compatible
├── test_resolve_session_id_signature_compatible
└── Catches: Method signature changes break subclasses

Current Status

📊 Channel Contract Test Coverage
   Total Channels: 11
   With Contract Tests: 12
   Missing: 0
   Contract Tests: 128 passing

📊 Channel Unit Test Coverage
   Total Channels: 11
   With Unit Tests: 11
   Missing: 0
   Unit Tests: 1,200+ passing

✅ All Channels fully covered:
   ConsoleChannel, DingTalkChannel, FeishuChannel,
   DiscordChannel, IMessageChannel, MQTTChannel,
   MatrixChannel, MattermostChannel, QQChannel,
   TelegramChannel, VoiceChannel

🎉 Zero missing tests - both contract and unit tests complete!

Core Principles

1. Contract tests are primary - Must pass in CI (hard gate)
2. Unit tests are required - Must pass in CI (hard gate)
3. All Channels have full coverage - Both contract and unit tests
4. Four-layer protection - Effective prevention against "fix Console breaks DingTalk"
5. Breaking tests = blocking PR - CI gates ensure quality

Quick Reference

Command	Purpose
make check-contracts	Show contract coverage status
pytest tests/contract/channels/ -v	Run all contract tests
pytest tests/unit/channels/ -v	Run all unit tests
pytest tests/unit/channels/test_dingtalk.py -v	Run specific Channel tests
pytest tests/unit/channels/ -k "test_init"	Run specific test pattern

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📖 中文版本

📋 Related: PR #2506 - Test infrastructure and coverage baseline establishment