chore(node-sdk): audit test-support and test

test-support/harness.mjs owns process, server, JSON, fixture, and plugin-runner helpers; provider helper files keep their APIs as thin wrappers. Guard fixtures write 0600 files and the CLI security test isolates XDG_CONFIG_HOME, so the suite passes on Linux.

Claude-Session: https://claude.ai/code/session_01Agoc9bRVE9KL7mmWtey9Vq

test-support/cursor-test-helpers.mjs

@@ -1,127 +1,56 @@
 import assert from 'node:assert/strict';
-import { spawn } from 'node:child_process';
-import { mkdir, mkdtemp, rm, writeFile } from 'node:fs/promises';
-import http from 'node:http';
-import os from 'node:os';
 import path from 'node:path';
-import { pathToFileURL } from 'node:url';
+import {
+  createFixtureRoot,
+  distUrl,
+  homeEnvironment,
+  installConfig as baseInstallConfig,
+  runPlugin as basePlugin,
+  runProcess,
+  writeOptionalJson,
+} from './harness.mjs';
 
-export const VALID_PRIVATE_KEY = Buffer.alloc(32).toString('base64url');
-export const pluginModuleUrl = pathToFileURL(path.resolve('dist/plugins/cursor.js')).href;
-export const registryModuleUrl = pathToFileURL(path.resolve('dist/plugins/registry.js')).href;
-export const ioModuleUrl = pathToFileURL(path.resolve('dist/plugins/cursor-io.js')).href;
-export const contractModuleUrl = pathToFileURL(path.resolve('dist/plugins/cursor-contract.js')).href;
-export const installationModuleUrl = pathToFileURL(
-  path.resolve('dist/plugins/cursor-installation.js'),
-).href;
+export {
+  VALID_PRIVATE_KEY,
+  registryModuleUrl,
+  runNode,
+  startApiServer,
+  writeJson,
+} from './harness.mjs';
 
-export function runNode(args, env, cwd, input = '') {
-  return new Promise((resolve, reject) => {
-    const child = spawn(process.execPath, args, {
-      cwd,
-      env: { ...process.env, ...env },
-      stdio: ['pipe', 'pipe', 'pipe'],
-    });
-    let stdout = '';
-    let stderr = '';
-    child.stdout.on('data', (chunk) => { stdout += chunk; });
-    child.stderr.on('data', (chunk) => { stderr += chunk; });
-    child.once('error', reject);
-    child.once('close', (code) => resolve({ code, stdout, stderr }));
-    child.stdin.end(input);
-  });
-}
+export const pluginModuleUrl = distUrl('plugins/cursor.js');
+export const ioModuleUrl = distUrl('plugins/cursor-io.js');
+export const contractModuleUrl = distUrl('plugins/cursor-contract.js');
+export const installationModuleUrl = distUrl('plugins/cursor-installation.js');
+const PLUGIN = { exportName: 'cursorPlugin', moduleUrl: pluginModuleUrl };
 
 export function runHook(handler, input, fixture, environment = {}) {
   const executable = process.platform === 'win32' ? 'powershell.exe' : '/bin/sh';
   const args = process.platform === 'win32'
     ? ['-NoProfile', '-NonInteractive', '-Command', handler.command]
     : ['-c', handler.command];
-  return new Promise((resolve, reject) => {
-    const child = spawn(executable, args, {
-      env: {
-        ...process.env,
-        HOME: fixture.homeDir,
-        USERPROFILE: fixture.homeDir,
-        ...environment,
-      },
-      stdio: ['pipe', 'pipe', 'pipe'],
-    });
-    let stdout = '';
-    let stderr = '';
-    child.stdout.on('data', (chunk) => { stdout += chunk; });
-    child.stderr.on('data', (chunk) => { stderr += chunk; });
-    child.once('error', reject);
-    child.once('close', (code) => resolve({ code, stdout, stderr }));
-    child.stdin.end(input);
-  });
-}
-
-export async function writeJson(filePath, value) {
-  await mkdir(path.dirname(filePath), { recursive: true });
-  const contents = typeof value === 'string' ? value : `${JSON.stringify(value, null, 2)}\n`;
-  await writeFile(filePath, contents, { encoding: 'utf-8', mode: 0o600 });
+  return runProcess(executable, args, { ...homeEnvironment(fixture), ...environment }, undefined, input);
 }
 
 export function installConfig(fixture, overrides = {}) {
-  return {
-    agentName: 'cursor',
-    orgId: 'org-1',
-    agentId: 'agent-1',
-    privateKey: VALID_PRIVATE_KEY,
-    kid: 'kid-1',
-    token: 'token-1',
-    baseUrl: fixture.baseUrl,
-    guardScriptPath: fixture.guardScriptPath,
-    hookScriptPath: fixture.hookScriptPath,
-    ...overrides,
-  };
+  return baseInstallConfig('cursor', fixture, overrides);
 }
 
-export async function runPlugin(fixture, method, argument) {
-  const source = `
-    import { cursorPlugin } from ${JSON.stringify(pluginModuleUrl)};
-    const argument = JSON.parse(process.env.ELYDORA_TEST_ARGUMENT);
-    const result = await cursorPlugin[process.env.ELYDORA_TEST_METHOD](argument);
-    if (result !== undefined) console.log(JSON.stringify(result));
-  `;
-  return runNode(
-    ['--input-type=module', '--eval', source],
-    {
-      HOME: fixture.homeDir,
-      USERPROFILE: fixture.homeDir,
-      ELYDORA_TEST_ARGUMENT: JSON.stringify(argument),
-      ELYDORA_TEST_METHOD: method,
-    },
-    fixture.projectDir,
-  );
+export function runPlugin(fixture, method, argument) {
+  return basePlugin(PLUGIN, fixture, method, argument);
 }
 
 export async function createFixture({ existingConfig, baseUrl = 'http://127.0.0.1:9' } = {}) {
-  const rootDir = await mkdtemp(path.join(os.tmpdir(), 'elydora-cursor-'));
-  const homeDir = path.join(rootDir, "home with spaces and 'quote");
-  const projectDir = path.join(rootDir, 'project with spaces');
-  const configPath = path.join(homeDir, '.cursor', 'hooks.json');
-  const agentDir = path.join(homeDir, '.elydora', 'agent-1');
-  const guardScriptPath = path.join(agentDir, 'guard.js');
-  const hookScriptPath = path.join(agentDir, 'hook.js');
-  await mkdir(projectDir, { recursive: true });
-  if (existingConfig !== undefined) await writeJson(configPath, existingConfig);
+  const base = await createFixtureRoot('elydora-cursor-', "home with spaces and 'quote");
+  const configPath = path.join(base.homeDir, '.cursor', 'hooks.json');
+  await writeOptionalJson(configPath, existingConfig);
   return {
-    agentDir,
+    ...base,
     baseUrl,
     configPath,
-    guardScriptPath,
-    homeDir,
-    hookScriptPath,
-    projectDir,
-    rootDir,
     install(overrides = {}) {
       return runPlugin(this, 'install', installConfig(this, overrides));
     },
-    async close() {
-      await rm(rootDir, { recursive: true, force: true });
-    },
   };
 }
 
@@ -145,34 +74,3 @@ export function assertNativeHandler(handler) {
 export function legacyHandler(scriptPath) {
   return { command: `node "${scriptPath}"` };
 }
-
-export async function startApiServer({ status = 'active', operationStatus = 201 } = {}) {
-  const requests = [];
-  const server = http.createServer(async (request, response) => {
-    const chunks = [];
-    for await (const chunk of request) chunks.push(chunk);
-    const raw = Buffer.concat(chunks).toString('utf-8');
-    requests.push({ method: request.method, url: request.url, raw });
-    if (request.method === 'GET') {
-      response.writeHead(200, { 'Content-Type': 'application/json' });
-      response.end(JSON.stringify({ agent: { status } }));
-      return;
-    }
-    response.writeHead(operationStatus, { 'Content-Type': 'application/json' });
-    response.end(operationStatus >= 200 && operationStatus < 300
-      ? JSON.stringify({ operation: { accepted: true } })
-      : JSON.stringify({ error: { code: 'UPSTREAM_FAILURE', message: 'failed' } }));
-  });
-  await new Promise((resolve, reject) => {
-    server.once('error', reject);
-    server.listen(0, '127.0.0.1', resolve);
-  });
-  const address = server.address();
-  return {
-    baseUrl: `http://127.0.0.1:${address.port}`,
-    requests,
-    close: () => new Promise((resolve, reject) => {
-      server.close((error) => error ? reject(error) : resolve());
-    }),
-  };
-}