feat(code-runtime): complete sandboxed Node execution and Session fixtures

packages/code-runtime/code-runtime-node/tests/launch.spec.ts

@@ -0,0 +1,25 @@
+import { expect, it } from 'vitest'
+import type { FileSystem } from '@deepseek-ai/dsh-fs'
+import { bootstrapArgs } from '../src/launch.ts'
+
+it('uses an explicit installed bootstrap without pretending it maps the host file', () => {
+  const fs = { processPathFromHostPath: () => { throw new Error('must not map') } } as unknown as FileSystem
+  expect(bootstrapArgs(fs, { bootstrapPath: '/remote/process.js' }, 2048)).toEqual(['/remote/process.js', '2048'])
+})
+
+it('fails when the execution world cannot read the source bootstrap', () => {
+  const fs = { processPathFromHostPath: () => undefined } as unknown as FileSystem
+  expect(() => bootstrapArgs(fs, {}, 2048)).toThrow('unavailable in the subprocess execution world')
+})
+
+it('selects the private packaged bootstrap through the existing executable', () => {
+  const prior = Object.getOwnPropertyDescriptor(process, 'pkg')
+  try {
+    Object.defineProperty(process, 'pkg', { configurable: true, value: {} })
+    const fs = { processPathFromHostPath: () => { throw new Error('pkg does not expose a host bootstrap file') } } as unknown as FileSystem
+    expect(bootstrapArgs(fs, {}, 2048)).toEqual(['2048'])
+  } finally {
+    if (prior === undefined) Reflect.deleteProperty(process, 'pkg')
+    else Object.defineProperty(process, 'pkg', prior)
+  }
+})