test(integrate-module): add compiled .js file spec

packages/integrate-module/src/compiled.d.ts

@@ -0,0 +1,3 @@
+export declare class CompiledClass {
+  name: string
+}

packages/integrate-module/src/compiled.js

@@ -0,0 +1,5 @@
+export class CompiledClass {
+  constructor() {
+    this.name = 'CompiledClass'
+  }
+}

packages/integrate-module/src/index.ts

@@ -4,6 +4,7 @@ import test from 'node:test'
 
 import { supportedExtensions } from 'file-type'
 
+import { CompiledClass } from './compiled.js'
 import { foo } from './foo.mjs'
 import { bar } from './subdirectory/bar.mjs'
 import { baz } from './subdirectory/index.mjs'
@@ -29,3 +30,8 @@ await test('resolve nested entry point', () => {
 await test('resolve paths', () => {
   assert.equal(subBar(), 'bar')
 })
+
+await test('compiled js file with .d.ts', () => {
+  const instance = new CompiledClass()
+  assert.equal(instance.name, 'CompiledClass')
+})