Add comprehensive Home Assistant WebSocket and API tests
- Created detailed test suite for Home Assistant WebSocket client - Implemented tests for WebSocket connection, authentication, and error handling - Added comprehensive test coverage for HassInstanceImpl API methods - Mocked WebSocket and fetch to simulate various connection scenarios - Covered authentication, state retrieval, service calls, and environment configuration - Improved test infrastructure for Home Assistant integration
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265
__tests__/hass/index.test.ts
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265
__tests__/hass/index.test.ts
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import { jest, describe, beforeEach, afterEach, it, expect } from '@jest/globals';
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import { WebSocket } from 'ws';
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import { EventEmitter } from 'events';
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// Define WebSocket mock types
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type WebSocketCallback = (...args: any[]) => void;
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type WebSocketEventHandler = (event: string, callback: WebSocketCallback) => void;
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type WebSocketSendHandler = (data: string) => void;
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type WebSocketCloseHandler = () => void;
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type WebSocketMock = {
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on: jest.MockedFunction<WebSocketEventHandler>;
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send: jest.MockedFunction<WebSocketSendHandler>;
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close: jest.MockedFunction<WebSocketCloseHandler>;
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readyState: number;
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OPEN: number;
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};
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// Mock WebSocket
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jest.mock('ws', () => {
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return {
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WebSocket: jest.fn().mockImplementation(() => ({
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on: jest.fn(),
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send: jest.fn(),
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close: jest.fn(),
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readyState: 1,
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OPEN: 1,
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removeAllListeners: jest.fn()
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}))
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};
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});
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// Mock fetch globally
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const mockFetch = jest.fn() as jest.MockedFunction<typeof fetch>;
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global.fetch = mockFetch;
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describe('Home Assistant Integration', () => {
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describe('HassWebSocketClient', () => {
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let client: any;
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const mockUrl = 'ws://localhost:8123/api/websocket';
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const mockToken = 'test_token';
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beforeEach(async () => {
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const { HassWebSocketClient } = await import('../../src/hass/index.js');
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client = new HassWebSocketClient(mockUrl, mockToken);
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});
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afterEach(() => {
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jest.clearAllMocks();
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});
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it('should create a WebSocket client with the provided URL and token', () => {
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expect(client).toBeInstanceOf(EventEmitter);
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expect(WebSocket).toHaveBeenCalledWith(mockUrl);
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});
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it('should connect and authenticate successfully', async () => {
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const mockWs = (WebSocket as jest.MockedClass<typeof WebSocket>).mock.results[0].value as unknown as WebSocketMock;
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const connectPromise = client.connect();
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// Get and call the open callback
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const openCallEntry = mockWs.on.mock.calls.find(call => call[0] === 'open');
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if (!openCallEntry) throw new Error('Open callback not found');
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const openCallback = openCallEntry[1];
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openCallback();
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// Verify authentication message
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expect(mockWs.send).toHaveBeenCalledWith(
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JSON.stringify({
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type: 'auth',
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access_token: mockToken
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})
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);
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// Get and call the message callback
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const messageCallEntry = mockWs.on.mock.calls.find(call => call[0] === 'message');
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if (!messageCallEntry) throw new Error('Message callback not found');
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const messageCallback = messageCallEntry[1];
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messageCallback(JSON.stringify({ type: 'auth_ok' }));
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await connectPromise;
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});
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it('should handle authentication failure', async () => {
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const mockWs = (WebSocket as jest.MockedClass<typeof WebSocket>).mock.results[0].value as unknown as WebSocketMock;
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const connectPromise = client.connect();
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// Get and call the open callback
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const openCallEntry = mockWs.on.mock.calls.find(call => call[0] === 'open');
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if (!openCallEntry) throw new Error('Open callback not found');
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const openCallback = openCallEntry[1];
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openCallback();
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// Get and call the message callback with auth failure
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const messageCallEntry = mockWs.on.mock.calls.find(call => call[0] === 'message');
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if (!messageCallEntry) throw new Error('Message callback not found');
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const messageCallback = messageCallEntry[1];
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messageCallback(JSON.stringify({ type: 'auth_invalid' }));
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await expect(connectPromise).rejects.toThrow();
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});
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it('should handle connection errors', async () => {
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const mockWs = (WebSocket as jest.MockedClass<typeof WebSocket>).mock.results[0].value as unknown as WebSocketMock;
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const connectPromise = client.connect();
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// Get and call the error callback
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const errorCallEntry = mockWs.on.mock.calls.find(call => call[0] === 'error');
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if (!errorCallEntry) throw new Error('Error callback not found');
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const errorCallback = errorCallEntry[1];
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errorCallback(new Error('Connection failed'));
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await expect(connectPromise).rejects.toThrow('Connection failed');
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});
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it('should handle message parsing errors', async () => {
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const mockWs = (WebSocket as jest.MockedClass<typeof WebSocket>).mock.results[0].value as unknown as WebSocketMock;
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const connectPromise = client.connect();
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// Get and call the open callback
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const openCallEntry = mockWs.on.mock.calls.find(call => call[0] === 'open');
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if (!openCallEntry) throw new Error('Open callback not found');
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const openCallback = openCallEntry[1];
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openCallback();
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// Get and call the message callback with invalid JSON
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const messageCallEntry = mockWs.on.mock.calls.find(call => call[0] === 'message');
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if (!messageCallEntry) throw new Error('Message callback not found');
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const messageCallback = messageCallEntry[1];
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// Should emit error event
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await expect(new Promise((resolve) => {
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client.once('error', resolve);
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messageCallback('invalid json');
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})).resolves.toBeInstanceOf(Error);
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});
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});
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describe('HassInstanceImpl', () => {
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let instance: any;
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const mockBaseUrl = 'http://localhost:8123';
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const mockToken = 'test_token';
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beforeEach(async () => {
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const { HassInstanceImpl } = await import('../../src/hass/index.js');
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instance = new HassInstanceImpl(mockBaseUrl, mockToken);
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mockFetch.mockClear();
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});
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it('should create an instance with the provided URL and token', () => {
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expect(instance.baseUrl).toBe(mockBaseUrl);
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expect(instance.token).toBe(mockToken);
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});
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it('should fetch states successfully', async () => {
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const mockStates = [
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{
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entity_id: 'light.living_room',
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state: 'on',
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attributes: {}
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}
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];
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mockFetch.mockResolvedValueOnce({
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ok: true,
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json: async () => mockStates
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} as Response);
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const states = await instance.fetchStates();
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expect(states).toEqual(mockStates);
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expect(mockFetch).toHaveBeenCalledWith(
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`${mockBaseUrl}/api/states`,
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expect.objectContaining({
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headers: {
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Authorization: `Bearer ${mockToken}`,
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'Content-Type': 'application/json'
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}
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})
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);
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});
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it('should fetch single entity state successfully', async () => {
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const mockState = {
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entity_id: 'light.living_room',
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state: 'on',
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attributes: {}
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};
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mockFetch.mockResolvedValueOnce({
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ok: true,
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json: async () => mockState
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} as Response);
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const state = await instance.fetchState('light.living_room');
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expect(state).toEqual(mockState);
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expect(mockFetch).toHaveBeenCalledWith(
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`${mockBaseUrl}/api/states/light.living_room`,
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expect.objectContaining({
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headers: {
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Authorization: `Bearer ${mockToken}`,
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'Content-Type': 'application/json'
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}
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})
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);
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});
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it('should call service successfully', async () => {
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mockFetch.mockResolvedValueOnce({
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ok: true,
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json: async () => ({})
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} as Response);
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await instance.callService('light', 'turn_on', { entity_id: 'light.living_room' });
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expect(mockFetch).toHaveBeenCalledWith(
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`${mockBaseUrl}/api/services/light/turn_on`,
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expect.objectContaining({
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method: 'POST',
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headers: {
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Authorization: `Bearer ${mockToken}`,
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'Content-Type': 'application/json'
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},
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body: JSON.stringify({ entity_id: 'light.living_room' })
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})
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);
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});
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});
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describe('get_hass', () => {
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const originalEnv = process.env;
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beforeEach(() => {
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process.env = { ...originalEnv };
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process.env.HASS_HOST = 'http://localhost:8123';
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process.env.HASS_TOKEN = 'test_token';
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});
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afterEach(() => {
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process.env = originalEnv;
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});
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it('should return a development instance by default', async () => {
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const { get_hass } = await import('../../src/hass/index.js');
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const instance = await get_hass();
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expect(instance.baseUrl).toBe('http://localhost:8123');
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expect(instance.token).toBe('test_token');
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});
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it('should return a test instance when specified', async () => {
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const { get_hass } = await import('../../src/hass/index.js');
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const instance = await get_hass('test');
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expect(instance.baseUrl).toBe('http://localhost:8123');
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expect(instance.token).toBe('test_token');
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});
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it('should return a production instance when specified', async () => {
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process.env.HASS_HOST = 'https://hass.example.com';
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process.env.HASS_TOKEN = 'prod_token';
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const { get_hass } = await import('../../src/hass/index.js');
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const instance = await get_hass('production');
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expect(instance.baseUrl).toBe('https://hass.example.com');
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expect(instance.token).toBe('prod_token');
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});
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});
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});
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