feat: add test fetchModule got sourcemap absolute path

test/vite-node/src/foo.js

@@ -0,0 +1 @@
+export const add = (a, b) => a + b

test/vite-node/test/server.test.ts

@@ -1,5 +1,8 @@
+import { resolve } from 'pathe'
 import { ViteNodeServer } from 'vite-node/server'
 import { describe, expect, test, vi } from 'vitest'
+import { createServer } from 'vite'
+import { extractSourceMap } from '../../../packages/vite-node/src/source-map'
 
 describe('server works correctly', async () => {
   test('resolve id considers transform mode', async () => {
@@ -26,4 +29,19 @@ describe('server works correctly', async () => {
     await vnServer.resolveId('/ssr', '/ssr path')
     expect(resolveId).toHaveBeenCalledWith('/ssr', '/ssr path', { ssr: true })
   })
+  test('fetchModule with id, and got sourcemap source in absolute path', async () => {
+    const server = await createServer({
+      logLevel: 'error',
+      root: resolve(__dirname, '../'),
+    })
+    const vnServer = new ViteNodeServer(server)
+
+    // fetchModule in not a valid filesystem path
+    const fetchResult = await vnServer.fetchModule('/src/foo.js')
+
+    const sourceMap = extractSourceMap(fetchResult.code!)
+
+    // expect got sourcemap source in a valid filesystem path
+    expect(sourceMap?.sources[0]).toBe(resolve(__dirname, '../src/foo.js'))
+  })
 })