test: add setImmediate polyfill for deno

src/main/ts/spawn.ts

@@ -2,7 +2,7 @@ import * as cp from 'node:child_process'
 import process from 'node:process'
 import EventEmitter from 'node:events'
 import { Readable, Writable, Stream, Transform } from 'node:stream'
-import { assign, noop, randomId } from './util.js'
+import { assign, noop, randomId, g } from './util.js'
 
 export * from './util.js'
 
@@ -102,7 +102,7 @@ export const defaults: TSpawnCtxNormalized = {
   get stdout(){ return new VoidStream() },
   get stderr(){ return new VoidStream() },
   stdio:      ['pipe', 'pipe', 'pipe'],
-  run:        setImmediate,
+  run:        g.setImmediate,
 }
 
 export const normalizeCtx = (...ctxs: TSpawnCtx[]): TSpawnCtxNormalized => assign({

src/main/ts/util.ts

@@ -1,5 +1,7 @@
 import { Stream } from 'node:stream'
 
+export const g = global || globalThis
+
 export const noop = () => { /* noop */ }
 
 export const randomId = () => Math.random().toString(36).slice(2)

src/main/ts/x.ts

@@ -17,7 +17,8 @@ import {
   assign,
   quote,
   buildCmd,
-  parseInput
+  parseInput,
+  g
 } from './util.js'
 import { pipeMixin } from './mixin/pipe.js'
 import { killMixin } from './mixin/kill.js'
@@ -85,8 +86,6 @@ export interface TShellSync {
   (opts: TShellOptions): TShellSync
 }
 
-const g = global || globalThis
-
 export const $: TShell = function(this: any, pieces?: any, ...args: any): any {
   const self =  (this !== g) && this
   const preset = self || {}

src/test/smoke/invoke.test.mjs

@@ -1,3 +1,8 @@
+if (globalThis.Deno) {
+  globalThis.setImmediate = (cb) => setTimeout(cb, 0)
+  globalThis.global = globalThis
+}
+
 import assert from 'node:assert'
 import { zurk, $ } from '../../../target/esm/index.mjs'