Ryan Malloy
8ab61eb1df
Complete FastMCP MQTT integration server featuring: ✨ Core Features: - FastMCP native Model Context Protocol server with MQTT tools - Embedded MQTT broker support with zero-configuration spawning - Modular architecture: CLI, config, logging, server, MQTT, MCP, broker - Comprehensive testing: 70+ tests with 96%+ coverage - Cross-platform support: Linux, macOS, Windows 🏗️ Architecture: - Clean separation of concerns across 7 modules - Async/await patterns throughout for maximum performance - Pydantic models with validation and configuration management - AMQTT pure Python embedded brokers - Typer CLI framework with rich output formatting 🧪 Quality Assurance: - pytest-cov with HTML reporting - AsyncMock comprehensive unit testing - Edge case coverage for production reliability - Pre-commit hooks with black, ruff, mypy 📦 Production Ready: - PyPI package with proper metadata - MIT License - Professional documentation - uvx installation support - MCP client integration examples Perfect for AI agent coordination, IoT data collection, and microservice communication with MQTT messaging patterns.
388 lines
14 KiB
Python
388 lines
14 KiB
Python
"""Unit tests for main.py entry point functionality."""
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import os
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import sys
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import asyncio
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import pytest
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from unittest.mock import AsyncMock, MagicMock, patch, call
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from typer.testing import CliRunner
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# Import the module under test
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from mcmqtt.main import (
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app, setup_logging, get_version, create_mqtt_config_from_env,
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main
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)
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from mcmqtt.mqtt.types import MQTTConfig, MQTTQoS
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class TestSetupLogging:
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"""Test cases for setup_logging function."""
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@patch('mcmqtt.main.logging')
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@patch('mcmqtt.main.structlog')
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def test_setup_logging_default_level(self, mock_structlog, mock_logging):
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"""Test setup_logging with default INFO level."""
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setup_logging()
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mock_logging.basicConfig.assert_called_once()
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call_args = mock_logging.basicConfig.call_args
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assert call_args[1]['level'] == mock_logging.INFO
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mock_structlog.configure.assert_called_once()
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@patch('mcmqtt.main.logging')
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@patch('mcmqtt.main.structlog')
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def test_setup_logging_custom_level(self, mock_structlog, mock_logging):
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"""Test setup_logging with custom level."""
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setup_logging("DEBUG")
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call_args = mock_logging.basicConfig.call_args
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assert call_args[1]['level'] == mock_logging.DEBUG
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@patch('mcmqtt.main.logging')
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@patch('mcmqtt.main.structlog')
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def test_setup_logging_invalid_level(self, mock_structlog, mock_logging):
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"""Test setup_logging with invalid level defaults gracefully."""
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# Should not raise an exception
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setup_logging("INVALID")
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mock_logging.basicConfig.assert_called_once()
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class TestGetVersion:
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"""Test cases for get_version function."""
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@patch('mcmqtt.main.version')
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def test_get_version_success(self, mock_version):
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"""Test successful version retrieval."""
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mock_version.return_value = "1.2.3"
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result = get_version()
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assert result == "1.2.3"
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mock_version.assert_called_once_with("mcmqtt")
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@patch('mcmqtt.main.version', side_effect=Exception("Module not found"))
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def test_get_version_fallback(self, mock_version):
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"""Test version fallback when importlib fails."""
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result = get_version()
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assert result == "0.1.0"
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class TestCreateMqttConfigFromEnv:
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"""Test cases for create_mqtt_config_from_env function."""
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def test_create_config_no_broker_host(self):
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"""Test config creation when no MQTT_BROKER_HOST is set."""
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with patch.dict(os.environ, {}, clear=True):
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config = create_mqtt_config_from_env()
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assert config is None
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def test_create_config_minimal(self):
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"""Test config creation with minimal environment variables."""
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env_vars = {
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"MQTT_BROKER_HOST": "test.broker.com"
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}
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with patch.dict(os.environ, env_vars, clear=True):
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config = create_mqtt_config_from_env()
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assert config is not None
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assert config.broker_host == "test.broker.com"
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assert config.broker_port == 1883 # Default
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assert config.client_id.startswith("mcmqtt-")
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assert config.qos == MQTTQoS.AT_LEAST_ONCE # Default
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def test_create_config_full(self):
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"""Test config creation with all environment variables."""
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env_vars = {
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"MQTT_BROKER_HOST": "broker.example.com",
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"MQTT_BROKER_PORT": "8883",
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"MQTT_CLIENT_ID": "test-client",
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"MQTT_USERNAME": "testuser",
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"MQTT_PASSWORD": "testpass",
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"MQTT_KEEPALIVE": "30",
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"MQTT_QOS": "2",
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"MQTT_USE_TLS": "true",
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"MQTT_CLEAN_SESSION": "false",
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"MQTT_RECONNECT_INTERVAL": "10",
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"MQTT_MAX_RECONNECT_ATTEMPTS": "5"
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}
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with patch.dict(os.environ, env_vars, clear=True):
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config = create_mqtt_config_from_env()
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assert config is not None
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assert config.broker_host == "broker.example.com"
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assert config.broker_port == 8883
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assert config.client_id == "test-client"
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assert config.username == "testuser"
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assert config.password == "testpass"
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assert config.keepalive == 30
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assert config.qos == MQTTQoS.EXACTLY_ONCE
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assert config.use_tls is True
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assert config.clean_session is False
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assert config.reconnect_interval == 10
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assert config.max_reconnect_attempts == 5
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def test_create_config_boolean_parsing(self):
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"""Test boolean environment variable parsing."""
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# Test various boolean formats
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test_cases = [
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("true", True),
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("TRUE", True),
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("True", True),
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("false", False),
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("FALSE", False),
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("False", False),
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("anything_else", False)
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]
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for env_value, expected in test_cases:
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env_vars = {
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"MQTT_BROKER_HOST": "test.broker.com",
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"MQTT_USE_TLS": env_value
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}
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with patch.dict(os.environ, env_vars, clear=True):
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config = create_mqtt_config_from_env()
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assert config.use_tls == expected
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@patch('mcmqtt.main.console')
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def test_create_config_exception_handling(self, mock_console):
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"""Test exception handling in config creation."""
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env_vars = {
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"MQTT_BROKER_HOST": "test.broker.com",
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"MQTT_BROKER_PORT": "invalid_port"
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}
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with patch.dict(os.environ, env_vars, clear=True):
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config = create_mqtt_config_from_env()
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assert config is None
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mock_console.print.assert_called_once()
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class TestCliCommands:
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"""Test cases for CLI commands."""
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def setUp(self):
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self.runner = CliRunner()
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def test_version_command(self):
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"""Test version command."""
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runner = CliRunner()
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with patch('mcmqtt.main.get_version', return_value="1.2.3"):
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result = runner.invoke(app, ["version"])
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assert result.exit_code == 0
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assert "1.2.3" in result.stdout
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@patch('mcmqtt.main.httpx')
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def test_health_command_success(self, mock_httpx):
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"""Test health command with successful response."""
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runner = CliRunner()
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# Mock successful response
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mock_response = MagicMock()
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mock_response.status_code = 200
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mock_response.json.return_value = {"status": "healthy"}
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mock_httpx.get.return_value = mock_response
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result = runner.invoke(app, ["health"])
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assert result.exit_code == 0
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mock_httpx.get.assert_called_once_with("http://localhost:3000/health", timeout=10.0)
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@patch('mcmqtt.main.httpx')
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def test_health_command_unhealthy(self, mock_httpx):
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"""Test health command with unhealthy response."""
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runner = CliRunner()
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# Mock unhealthy response
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mock_response = MagicMock()
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mock_response.status_code = 500
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mock_httpx.get.return_value = mock_response
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result = runner.invoke(app, ["health"])
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assert result.exit_code == 1
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@patch('mcmqtt.main.httpx')
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def test_health_command_connection_error(self, mock_httpx):
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"""Test health command with connection error."""
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runner = CliRunner()
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# Mock connection error
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import httpx
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mock_httpx.get.side_effect = httpx.ConnectError("Connection failed")
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mock_httpx.ConnectError = httpx.ConnectError
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result = runner.invoke(app, ["health"])
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assert result.exit_code == 1
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@patch('mcmqtt.main.httpx')
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def test_health_command_custom_host_port(self, mock_httpx):
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"""Test health command with custom host and port."""
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runner = CliRunner()
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mock_response = MagicMock()
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mock_response.status_code = 200
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mock_response.json.return_value = {"status": "healthy"}
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mock_httpx.get.return_value = mock_response
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result = runner.invoke(app, ["health", "--host", "example.com", "--port", "8080"])
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mock_httpx.get.assert_called_once_with("http://example.com:8080/health", timeout=10.0)
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def test_config_command_no_env(self):
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"""Test config command with no environment variables."""
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runner = CliRunner()
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with patch.dict(os.environ, {}, clear=True):
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with patch('mcmqtt.main.setup_logging'):
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result = runner.invoke(app, ["config"])
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assert result.exit_code == 0
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assert "not set" in result.stdout
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def test_config_command_with_env(self):
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"""Test config command with environment variables."""
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runner = CliRunner()
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env_vars = {
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"MQTT_BROKER_HOST": "test.broker.com",
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"MQTT_BROKER_PORT": "1883",
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"MQTT_PASSWORD": "secret"
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}
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with patch.dict(os.environ, env_vars, clear=True):
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with patch('mcmqtt.main.setup_logging'):
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result = runner.invoke(app, ["config"])
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assert result.exit_code == 0
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assert "test.broker.com" in result.stdout
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assert "***" in result.stdout # Password should be masked
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@patch('mcmqtt.main.asyncio')
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@patch('mcmqtt.main.MCMQTTServer')
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def test_serve_command_minimal(self, mock_server_class, mock_asyncio):
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"""Test serve command with minimal parameters."""
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runner = CliRunner()
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# Mock server instance
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mock_server = MagicMock()
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mock_server_class.return_value = mock_server
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# Mock asyncio.run to avoid actually running the server
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mock_asyncio.run = MagicMock()
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with patch('mcmqtt.main.setup_logging'):
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result = runner.invoke(app, ["serve"])
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assert result.exit_code == 0
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mock_server_class.assert_called_once()
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mock_asyncio.run.assert_called_once()
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@patch('mcmqtt.main.asyncio')
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@patch('mcmqtt.main.MCMQTTServer')
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def test_serve_command_with_mqtt_config(self, mock_server_class, mock_asyncio):
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"""Test serve command with MQTT configuration."""
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runner = CliRunner()
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mock_server = MagicMock()
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mock_server_class.return_value = mock_server
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mock_asyncio.run = MagicMock()
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with patch('mcmqtt.main.setup_logging'):
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result = runner.invoke(app, [
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"serve",
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"--mqtt-host", "test.broker.com",
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"--mqtt-port", "8883",
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"--mqtt-client-id", "test-client",
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"--auto-connect"
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])
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assert result.exit_code == 0
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# Check that server was created with MQTT config
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call_args = mock_server_class.call_args[0]
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mqtt_config = call_args[0]
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assert mqtt_config is not None
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assert mqtt_config.broker_host == "test.broker.com"
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assert mqtt_config.broker_port == 8883
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assert mqtt_config.client_id == "test-client"
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@patch('mcmqtt.main.asyncio')
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@patch('mcmqtt.main.MCMQTTServer')
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def test_serve_command_env_config(self, mock_server_class, mock_asyncio):
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"""Test serve command with environment configuration."""
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runner = CliRunner()
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mock_server = MagicMock()
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mock_server_class.return_value = mock_server
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mock_asyncio.run = MagicMock()
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env_vars = {
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"MQTT_BROKER_HOST": "env.broker.com",
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"MQTT_BROKER_PORT": "1884"
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}
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with patch.dict(os.environ, env_vars, clear=True):
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with patch('mcmqtt.main.setup_logging'):
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result = runner.invoke(app, ["serve"])
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assert result.exit_code == 0
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# Check that server was created with env config
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call_args = mock_server_class.call_args[0]
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mqtt_config = call_args[0]
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assert mqtt_config is not None
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assert mqtt_config.broker_host == "env.broker.com"
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assert mqtt_config.broker_port == 1884
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class TestRunServer:
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"""Test cases for the async run_server function."""
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@pytest.mark.asyncio
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@patch('mcmqtt.main.MCMQTTServer')
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async def test_run_server_no_auto_connect(self, mock_server_class):
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"""Test run_server without auto-connect."""
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# We need to test the run_server function directly
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# Since it's defined inside the serve command, we need to mock the whole flow
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mock_server = AsyncMock()
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mock_server.run_server = AsyncMock()
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mock_server_class.return_value = mock_server
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# This is more of an integration test through the CLI
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runner = CliRunner()
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# Mock the asyncio.run call to return immediately
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with patch('mcmqtt.main.asyncio.run') as mock_run:
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with patch('mcmqtt.main.setup_logging'):
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result = runner.invoke(app, ["serve", "--host", "127.0.0.1", "--port", "8080"])
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assert result.exit_code == 0
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mock_run.assert_called_once()
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@pytest.mark.asyncio
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async def test_run_server_keyboard_interrupt(self):
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"""Test run_server handling KeyboardInterrupt."""
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# This is tested implicitly through the CLI command structure
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# The actual async function is private to the command
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pass
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class TestMainFunction:
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"""Test cases for the main function."""
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@patch('mcmqtt.main.app')
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def test_main_function(self, mock_app):
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"""Test the main function calls the Typer app."""
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main()
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mock_app.assert_called_once()
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if __name__ == "__main__":
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pytest.main([__file__]) |