fix(vite-node): circular import stuck (#3418)

examples/mocks/src/main.js

@@ -1,5 +1,10 @@
 import { funcA } from './A'
+import { funcB } from './B'
 
 export function main() {
   return funcA()
 }
+
+export function mainB() {
+  return funcB()
+}

examples/mocks/test/circular.spec.ts

@@ -1,18 +1,27 @@
 import { expect, test, vi } from 'vitest'
-import { main } from '../src/main.js'
+import { main, mainB } from '../src/main.js'
 import x from '../src/export-default-circle-index'
 
 vi.mock('../src/A', async () => ({
   ...(await vi.importActual<any>('../src/A')),
   funcA: () => 'mockedA',
 }))
 
+vi.mock('../src/B', async () => ({
+  ...(await vi.importActual<any>('../src/B')),
+  funcB: () => 'mockedB',
+}))
+
 vi.mock('../src/export-default-circle-b')
 
 test('can import actual inside mock factory', () => {
   expect(main()).toBe('mockedA')
 })
 
+test('can import in top level and inside mock factory', () => {
+  expect(mainB()).toBe('mockedB')
+})
+
 test('can mock a circular dependency', () => {
   expect(x()).toBe(undefined)
 })

packages/vite-node/src/client.ts

@@ -193,7 +193,7 @@ export class ViteNodeRunner {
     const getStack = () => `stack:\n${[...callstack, fsPath].reverse().map(p => `  - ${p}`).join('\n')}`
 
     // check circular dependency
-    if (callstack.includes(fsPath) || callstack.some(c => this.moduleCache.get(c).importers?.has(fsPath))) {
+    if (callstack.includes(fsPath) || callstack.some(c => this.moduleCache.get(c).importers?.has(fsPath)) || mod.importers.has(importee)) {
       if (mod.exports)
         return mod.exports
     }