fix: support for define global constants

packages/vitest/src/node/config.ts

@@ -61,6 +61,8 @@ export function resolveConfig(
   if (viteConfig.base !== '/')
     resolved.base = viteConfig.base
 
+  resolved.define = viteConfig.define
+
   resolved.coverage = resolveC8Options(options.coverage || {}, resolved.root)
 
   resolved.deps = resolved.deps || {}

packages/vitest/src/node/execute.ts

@@ -43,6 +43,8 @@ export class VitestRunner extends ViteNodeRunner {
       __vite_ssr_dynamic_import__: (dep: string) => mocker.requestWithMock(dep),
 
       __vitest_mocker__: mocker,
+
+      ...process.__vitest_worker__.config.define,
     })
   }
 }

packages/vitest/src/types/config.ts

@@ -325,4 +325,6 @@ export interface ResolvedConfig extends Omit<Required<UserConfig>, 'config' | 'f
   reporters: (Reporter | BuiltinReporters)[]
 
   api?: ApiConfig
+
+  define?: Record<string, any>
 }

test/coverage-test/src/Defined.vue

@@ -0,0 +1,6 @@
+<script setup lang="ts">
+const defined = MY_CONSTANT
+</script>
+<template>
+  {{ defined }}
+</template>

test/coverage-test/test/vue.test.ts

@@ -5,6 +5,7 @@
 import { expect, test } from 'vitest'
 import { mount } from '@vue/test-utils'
 import Hello from '../src/Hello.vue'
+import Defined from '../src/Defined.vue'
 
 test('vue 3 coverage', async() => {
   expect(Hello).toBeTruthy()
@@ -26,3 +27,11 @@ test('vue 3 coverage', async() => {
 
   expect(wrapper.text()).toContain('4 x 4 = 16')
 })
+
+test('define package in vm', () => {
+  expect(Defined).toBeTruthy()
+
+  const wrapper = mount(Defined)
+
+  expect(wrapper.text()).toContain(MY_CONSTANT)
+})

test/coverage-test/typings.d.ts

@@ -0,0 +1 @@
+declare const MY_CONSTANT: string

test/coverage-test/vitest.config.ts

@@ -5,6 +5,9 @@ export default defineConfig({
   plugins: [
     vue(),
   ],
+  define: {
+    MY_CONSTANT: '"my constant"',
+  },
   test: {
   },
 })