spaxel/dashboard/js/onboard.test.setup.js

/**
 * Jest setup for onboard tests.
 * Mocks Web Serial API, fetch, WebSocket, and sessionStorage.
 */

// Mock TextEncoderStream (not available in jsdom)
// Must provide functional readable/writable for pipeTo to work
var _lastEncodedData = '';
global.TextEncoderStream = class TextEncoderStream {
    constructor() {
        this.readable = {
            pipeTo: jest.fn().mockResolvedValue(undefined),
        };
        this.writable = {
            getWriter: jest.fn().mockReturnValue({
                write: jest.fn(function (data) { _lastEncodedData = data; }),
                close: jest.fn().mockResolvedValue(undefined),
                releaseLock: jest.fn(),
            }),
        };
    }
};
global.__getLastEncodedData = function () { return _lastEncodedData; };
global.__clearLastEncodedData = function () { _lastEncodedData = ''; };

// Mock TextDecoderStream (not available in jsdom)
var _lastDecodedChunk = '{"ok":true,"mac":"AA:BB:CC:DD:EE:FF"}\n';
global.TextDecoderStream = class TextDecoderStream {
    constructor() {
        this.readable = {
            getReader: jest.fn().mockReturnValue({
                read: jest.fn().mockResolvedValue({ done: false, value: _lastDecodedChunk }),
                cancel: jest.fn().mockResolvedValue(undefined),
            }),
        };
        this.writable = {
            pipeTo: jest.fn().mockResolvedValue(undefined),
        };
    }
};
global.__setLastDecodedChunk = function (chunk) { _lastDecodedChunk = chunk; };
global.__getLastDecodedChunk = function () { return _lastDecodedChunk; };

// Mock ReadableStream/WritableStream (not available in jsdom)
global.ReadableStream = class ReadableStream {};
global.WritableStream = class WritableStream {};

// Mock navigator.serial
const mockPort = {
    open: jest.fn().mockResolvedValue(undefined),
    close: jest.fn().mockResolvedValue(undefined),
    readable: {
        pipeTo: jest.fn().mockResolvedValue(undefined),
    },
    writable: {
        getWriter: jest.fn().mockReturnValue({
            write: jest.fn().mockResolvedValue(undefined),
            close: jest.fn().mockResolvedValue(undefined),
            releaseLock: jest.fn(),
        }),
    },
};

Object.defineProperty(navigator, 'serial', {
    value: {
        requestPort: jest.fn().mockResolvedValue(mockPort),
        getPorts: jest.fn().mockResolvedValue([mockPort]),
    },
    writable: true,
    configurable: true,
});

// Mock fetch
global.fetch = jest.fn().mockResolvedValue({
    ok: true,
    json: jest.fn().mockResolvedValue([]),
});

// Mock WebSocket — use a factory so resetAllMocks doesn't break it
function _makeWSMock() {
    return {
        binaryType: 'arraybuffer',
        close: jest.fn(),
        send: jest.fn(),
        readyState: 1,
        onopen: null,
        onclose: null,
        onerror: null,
        onmessage: null,
    };
}
global.WebSocket = jest.fn().mockImplementation(function () {
    return _makeWSMock();
});

// Mock crypto.randomUUID
Object.defineProperty(global, 'crypto', {
    value: {
        randomUUID: jest.fn().mockReturnValue('test-uuid-1234'),
    },
});

// Mock customElements
global.customElements = {
    get: jest.fn().mockReturnValue(null),
    define: jest.fn(),
};

// Mock sessionStorage
var storage = {};
global.sessionStorage = {
    getItem: jest.fn(function (key) { return storage[key] || null; }),
    setItem: jest.fn(function (key, val) { storage[key] = val; }),
    removeItem: jest.fn(function (key) { delete storage[key]; }),
    clear: jest.fn(function () { storage = {}; }),
};

// Export mock port for tests
global.__mockPort = mockPort;