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spboyer
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ianphil
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feat: add unit tests for platform-specific paths (#64)
* feat: add unit tests for platform-specific paths in SdkLoader and CopilotBootstrap Add test coverage for: - Well-known npm prefix paths on Windows, macOS, Linux - Bundled Node.js path resolution per platform - npm CLI path resolution per platform - Copilot shim generation (cmd vs shell) - CLI path detection (nested vs flat) - Local install readiness checks Fixes #49 * fix: add eslint-disable for require() in jest.isolateModules The require() calls inside jest.isolateModules() are intentional - this is the correct Jest pattern for testing module isolation. --------- Co-authored-by: Ian Philpot <ian.philpot@microsoft.com>
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‎src/main/services/CopilotBootstrap.test.ts‎

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/* eslint-disable @typescript-eslint/no-var-requires */
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afterEach(() => {
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jest.restoreAllMocks();
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jest.resetModules();
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});
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// Mock electron
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jest.mock('electron', () => ({
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app: {
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isPackaged: false,
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getPath: jest.fn().mockReturnValue('/tmp/test'),
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},
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}));
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// Mock AppPaths
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jest.mock('./AppPaths', () => ({
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getBundledNodeRoot: jest.fn().mockReturnValue('/app/resources/node'),
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getCopilotBootstrapDir: jest.fn().mockReturnValue('/tmp/copilot-bootstrap'),
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getCopilotLocalNodeModulesDir: jest.fn().mockReturnValue('/tmp/copilot-bootstrap/node_modules'),
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getCopilotLogsDir: jest.fn().mockReturnValue('/tmp/copilot-logs'),
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}));
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// Mock fs at module level so properties are configurable
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jest.mock('fs');
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describe('CopilotBootstrap platform-specific behavior', () => {
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describe('getLocalCopilotCliPath', () => {
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test('returns nested CLI path when it exists', () => {
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const fs = require('fs');
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fs.existsSync.mockImplementation((p: string) => {
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return p.toString().includes('copilot-sdk') && p.toString().includes('npm-loader.js');
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});
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jest.isolateModules(() => {
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const { getLocalCopilotCliPath } = require('./CopilotBootstrap');
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const result = getLocalCopilotCliPath();
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expect(result).not.toBeNull();
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expect(result).toContain('copilot-sdk');
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expect(result).toContain('npm-loader.js');
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});
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});
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test('falls back to flat CLI path when nested does not exist', () => {
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const fs = require('fs');
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fs.existsSync.mockImplementation((p: string) => {
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const s = p.toString();
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// Nested path doesn't exist, flat path does
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if (s.includes('copilot-sdk') && s.includes('npm-loader.js')) return false;
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if (s.includes('@github') && s.includes('copilot') && s.includes('npm-loader.js')) return true;
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return false;
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});
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jest.isolateModules(() => {
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const { getLocalCopilotCliPath } = require('./CopilotBootstrap');
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const result = getLocalCopilotCliPath();
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expect(result).not.toBeNull();
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expect(result).toContain('npm-loader.js');
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});
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});
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test('returns null when no CLI path exists', () => {
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const fs = require('fs');
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fs.existsSync.mockReturnValue(false);
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jest.isolateModules(() => {
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const { getLocalCopilotCliPath } = require('./CopilotBootstrap');
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expect(getLocalCopilotCliPath()).toBeNull();
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});
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});
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});
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describe('isLocalCopilotInstallReady', () => {
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test('returns false when SDK package.json does not exist', () => {
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const fs = require('fs');
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fs.existsSync.mockReturnValue(false);
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jest.isolateModules(() => {
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const { isLocalCopilotInstallReady } = require('./CopilotBootstrap');
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expect(isLocalCopilotInstallReady()).toBe(false);
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});
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});
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test('returns true when SDK and CLI are both present', () => {
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const fs = require('fs');
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fs.existsSync.mockReturnValue(true);
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jest.isolateModules(() => {
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const { isLocalCopilotInstallReady } = require('./CopilotBootstrap');
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expect(isLocalCopilotInstallReady()).toBe(true);
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});
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});
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});
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describe('ensureCopilotInstalled', () => {
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test('skips install in development mode (app.isPackaged = false)', async () => {
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jest.isolateModules(async () => {
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const { ensureCopilotInstalled } = require('./CopilotBootstrap');
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await expect(ensureCopilotInstalled()).resolves.toBeUndefined();
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});
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});
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});
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describe('getLocalCopilotNodeModulesDir', () => {
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test('returns the configured local node_modules directory', () => {
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jest.isolateModules(() => {
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const { getLocalCopilotNodeModulesDir } = require('./CopilotBootstrap');
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const result = getLocalCopilotNodeModulesDir();
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expect(result).toContain('node_modules');
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});
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});
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});
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});

‎src/main/services/SdkLoader.test.ts‎

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/* eslint-disable @typescript-eslint/no-var-requires */
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const originalPlatform = process.platform;
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function mockPlatform(platform: string) {
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Object.defineProperty(process, 'platform', { value: platform, writable: true });
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}
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afterEach(() => {
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Object.defineProperty(process, 'platform', { value: originalPlatform, writable: true });
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jest.restoreAllMocks();
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jest.resetModules();
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});
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// Mock electron
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jest.mock('electron', () => ({
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app: { isPackaged: false, getPath: jest.fn().mockReturnValue('/tmp') },
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}));
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// Mock AppPaths
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jest.mock('./AppPaths', () => ({
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getBundledNodeRoot: jest.fn().mockReturnValue(null),
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getCopilotBootstrapDir: jest.fn().mockReturnValue('/tmp/copilot-bootstrap'),
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getCopilotLocalNodeModulesDir: jest.fn().mockReturnValue('/tmp/copilot-bootstrap/node_modules'),
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getCopilotLogsDir: jest.fn().mockReturnValue('/tmp/copilot-logs'),
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}));
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// Mock CopilotBootstrap
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jest.mock('./CopilotBootstrap', () => ({
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ensureCopilotInstalled: jest.fn().mockResolvedValue(undefined),
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getLocalCopilotCliPath: jest.fn().mockReturnValue(null),
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getLocalCopilotNodeModulesDir: jest.fn().mockReturnValue('/tmp/copilot-bootstrap/node_modules'),
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isLocalCopilotInstallReady: jest.fn().mockReturnValue(false),
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}));
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// Mock fs and os at module level so properties are configurable
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jest.mock('fs');
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jest.mock('os');
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// Mock child_process to prevent real execSync calls
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jest.mock('child_process', () => ({
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execSync: jest.fn().mockImplementation(() => { throw new Error('npm not found'); }),
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}));
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describe('SdkLoader platform-specific paths', () => {
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describe('Well-known prefixes on macOS', () => {
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test('probes /usr/local and /opt/homebrew on darwin', () => {
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mockPlatform('darwin');
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const os = require('os');
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const fs = require('fs');
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os.homedir.mockReturnValue('/Users/testuser');
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fs.existsSync.mockReturnValue(false);
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fs.readFileSync.mockImplementation(() => { throw new Error('not found'); });
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jest.isolateModules(() => {
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const { loadSdk } = require('./SdkLoader');
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expect(loadSdk()).rejects.toThrow();
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});
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});
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});
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describe('Well-known prefixes on Windows', () => {
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test('checks APPDATA/npm on Windows', () => {
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mockPlatform('win32');
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const origAppData = process.env.APPDATA;
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process.env.APPDATA = 'C:\\Users\\test\\AppData\\Roaming';
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const os = require('os');
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const fs = require('fs');
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os.homedir.mockReturnValue('C:\\Users\\test');
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fs.existsSync.mockReturnValue(false);
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fs.readFileSync.mockImplementation(() => { throw new Error('not found'); });
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jest.isolateModules(() => {
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const { loadSdk } = require('./SdkLoader');
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expect(loadSdk()).rejects.toThrow();
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});
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process.env.APPDATA = origAppData;
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});
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});
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describe('SDK loading with global install', () => {
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test('finds SDK in global node_modules on Unix', () => {
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mockPlatform('linux');
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const os = require('os');
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const fs = require('fs');
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os.homedir.mockReturnValue('/home/testuser');
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fs.existsSync.mockImplementation((p: string) => {
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const s = p.toString();
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if (s.includes('/usr/local/lib/node_modules/@github/copilot-sdk/package.json')) return true;
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if (s.includes('/usr/local/lib/node_modules/@github/copilot-sdk/dist/index.js')) return true;
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return false;
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});
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fs.readFileSync.mockImplementation(() => { throw new Error('not found'); });
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jest.isolateModules(() => {
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const { loadSdk } = require('./SdkLoader');
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// loadSdk will try dynamic import which will fail in test env,
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// but it should get past the prefix resolution step
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expect(loadSdk()).rejects.toThrow();
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});
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});
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test('finds SDK in APPDATA/npm/node_modules on Windows', () => {
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mockPlatform('win32');
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const origAppData = process.env.APPDATA;
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process.env.APPDATA = 'C:\\Users\\test\\AppData\\Roaming';
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const os = require('os');
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const fs = require('fs');
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os.homedir.mockReturnValue('C:\\Users\\test');
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fs.existsSync.mockImplementation((p: string) => {
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const s = p.toString();
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if (s.includes('npm\\node_modules\\@github\\copilot-sdk\\package.json')) return true;
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return false;
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});
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fs.readFileSync.mockImplementation(() => { throw new Error('not found'); });
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jest.isolateModules(() => {
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const { loadSdk } = require('./SdkLoader');
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expect(loadSdk()).rejects.toThrow();
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});
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process.env.APPDATA = origAppData;
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});
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});
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});

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