feat(code-runtime): own portable-identifier exclusions at the seam

Move the reserved-word, reserved-global, reserved-error-member, and dunder exclusion sets from the worker backend up to the code-runtime seam package, and narrow the portable identifier subset to drop the JS-only `$`. Every backend now imports one contract so a binding namespace list valid on one backend is valid on all. Delivers only the seam extension and the worker's adoption; the Python backend, py-types renderer, and Code Mode language dispatch are later PRs in the stack that depend on these exports.
2026-08-07 11:20:05 +08:00
parent 70937db8a0
commit 5d4cea9dc1
8 changed files with 256 additions and 19 deletions
@@ -0,0 +1,51 @@
+import { describe, expect, it } from 'vitest'
+import {
+  DUNDER_MEMBER,
+  PORTABLE_RESERVED_WORDS,
+  RESERVED_BINDING_GLOBALS,
+  RESERVED_ERROR_MEMBERS,
+} from '@deepseek-ai/dsh-code-runtime'
+
+/**
+ * The seam owns the portable-identifier exclusion sets so every backend
+ * enforces one contract: a namespace list valid on one backend is valid on
+ * all. These assertions pin the shared membership backends import rather than
+ * re-declare.
+ */
+describe('seam-owned portable identifier exclusions', () => {
+  it('RESERVED_BINDING_GLOBALS covers each backend-owned slot', () => {
+    expect(RESERVED_BINDING_GLOBALS.has('console')).toBe(true)
+    expect(RESERVED_BINDING_GLOBALS.has('__dsh_main__')).toBe(true)
+    expect(RESERVED_BINDING_GLOBALS.has('__builtins__')).toBe(true)
+    expect(RESERVED_BINDING_GLOBALS.has('__name__')).toBe(true)
+    expect(RESERVED_BINDING_GLOBALS.has('__debug__')).toBe(true)
+    expect(RESERVED_BINDING_GLOBALS.has('tools')).toBe(false)
+  })
+
+  it('RESERVED_ERROR_MEMBERS covers the JS Error and Python exception-protocol members', () => {
+    for (const name of ['name', 'message', 'stack', 'args', 'with_traceback', 'add_note']) {
+      expect(RESERVED_ERROR_MEMBERS.has(name)).toBe(true)
+    }
+    expect(RESERVED_ERROR_MEMBERS.has('code')).toBe(false)
+  })
+
+  it('DUNDER_MEMBER matches dunder-form names only', () => {
+    expect(DUNDER_MEMBER.test('__dict__')).toBe(true)
+    expect(DUNDER_MEMBER.test('__init__')).toBe(true)
+    expect(DUNDER_MEMBER.test('_private')).toBe(false)
+    expect(DUNDER_MEMBER.test('name')).toBe(false)
+    expect(DUNDER_MEMBER.test('__mid')).toBe(false)
+  })
+
+  it('PORTABLE_RESERVED_WORDS is the union of ECMAScript and Python reserved words', () => {
+    // ECMAScript-only keyword.
+    expect(PORTABLE_RESERVED_WORDS.has('function')).toBe(true)
+    // Python-only keyword — refused here so the list stays portable.
+    expect(PORTABLE_RESERVED_WORDS.has('lambda')).toBe(true)
+    expect(PORTABLE_RESERVED_WORDS.has('nonlocal')).toBe(true)
+    // Shared keyword.
+    expect(PORTABLE_RESERVED_WORDS.has('class')).toBe(true)
+    // Ordinary identifier is not reserved.
+    expect(PORTABLE_RESERVED_WORDS.has('tools')).toBe(false)
+  })
+})