import { describe, it, expect, beforeEach, afterEach, vi } from 'vitest';
import { JavascriptDebugAdapter } from '../../src/index.js';
// Minimal AdapterDependencies stub
const deps = {
logger: {
info: () => {},
error: () => {},
debug: () => {},
warn: () => {}
}
} as unknown as import('@debugmcp/shared').AdapterDependencies;
function isVendorPath(p: unknown): boolean {
return typeof p === 'string' && (p as string).replace(/\\+/g, '/').endsWith('/vendor/js-debug/vsDebugServer.cjs');
}
describe('JavascriptDebugAdapter.buildAdapterCommand (edge/env stability)', () => {
const isWin = process.platform === 'win32';
const fakeNode = isWin ? 'C:\\\\node\\\\node.exe' : '/usr/bin/node';
const baseConfig = {
sessionId: 'sess',
executablePath: fakeNode,
adapterHost: '127.0.0.1',
adapterPort: 12345,
logDir: isWin ? 'C:\\\\tmp\\\\logs' : '/tmp/logs',
scriptPath: isWin ? 'C:\\\\tmp\\\\app.js' : '/tmp/app.js',
launchConfig: {}
} as unknown as import('@debugmcp/shared').AdapterConfig;
let originalNodeOptions: string | undefined;
beforeEach(() => {
originalNodeOptions = process.env.NODE_OPTIONS;
});
afterEach(() => {
if (typeof originalNodeOptions === 'string') {
process.env.NODE_OPTIONS = originalNodeOptions;
} else {
delete (process.env as Record<string, string | undefined>).NODE_OPTIONS;
}
vi.restoreAllMocks();
vi.clearAllMocks();
});
it('repeated calls are stable when NODE_OPTIONS already includes max-old-space-size (normalize whitespace once, no duplication)', () => {
const adapter = new JavascriptDebugAdapter(deps);
process.env.NODE_OPTIONS = ' --MAX-OLD-SPACE-SIZE=2048 --trace-warnings ';
const first = adapter.buildAdapterCommand(baseConfig);
const second = adapter.buildAdapterCommand(baseConfig);
const third = adapter.buildAdapterCommand(baseConfig);
// Adapter path sanity
expect(isVendorPath(first.args?.[0])).toBe(true);
// Normalized once to single spaces and trimmed; identical across calls
expect(first.env?.NODE_OPTIONS).toBe('--MAX-OLD-SPACE-SIZE=2048 --trace-warnings');
expect(second.env?.NODE_OPTIONS).toBe('--MAX-OLD-SPACE-SIZE=2048 --trace-warnings');
expect(third.env?.NODE_OPTIONS).toBe('--MAX-OLD-SPACE-SIZE=2048 --trace-warnings');
// process.env untouched
expect(process.env.NODE_OPTIONS).toBe(' --MAX-OLD-SPACE-SIZE=2048 --trace-warnings ');
});
it('repeated calls are stable when NODE_OPTIONS missing memory flag (append once, normalize whitespace)', () => {
const adapter = new JavascriptDebugAdapter(deps);
process.env.NODE_OPTIONS = ' --experimental-repl-await --trace-warnings ';
const first = adapter.buildAdapterCommand(baseConfig);
const second = adapter.buildAdapterCommand(baseConfig);
// Should contain both flags, single spaces, no duplication across calls
const expected = '--experimental-repl-await --trace-warnings --max-old-space-size=4096';
expect(first.env?.NODE_OPTIONS).toBe(expected);
expect(second.env?.NODE_OPTIONS).toBe(expected);
// process.env untouched
expect(process.env.NODE_OPTIONS).toBe(' --experimental-repl-await --trace-warnings ');
});
it('empty NODE_OPTIONS stays stable across repeated calls (single memory flag only)', () => {
const adapter = new JavascriptDebugAdapter(deps);
delete (process.env as Record<string, string | undefined>).NODE_OPTIONS;
const first = adapter.buildAdapterCommand(baseConfig);
const second = adapter.buildAdapterCommand(baseConfig);
expect(first.env?.NODE_OPTIONS).toBe('--max-old-space-size=4096');
expect(second.env?.NODE_OPTIONS).toBe('--max-old-space-size=4096');
expect(process.env.NODE_OPTIONS).toBeUndefined();
});
});
