fix: base option doesn't crash vitest

packages/vitest/src/node/plugins/index.ts

@@ -74,6 +74,7 @@ export async function VitestPlugin(
         const resolveOptions = getDefaultResolveOptions()
 
         let config: ViteConfig = {
+          base: '/',
           root: viteConfig.test?.root || options.root,
           define: {
             // disable replacing `process.env.NODE_ENV` with static string by vite:client-inject

packages/vitest/src/node/plugins/vitestResolver.ts

@@ -7,6 +7,14 @@ export function VitestProjectResolver(ctx: Vitest): Plugin {
   const plugin: Plugin = {
     name: 'vitest:resolve-root',
     enforce: 'pre',
+    config: {
+      order: 'post',
+      handler() {
+        return {
+          base: '/',
+        }
+      },
+    },
     async resolveId(id, _, { ssr }) {
       if (id === 'vitest' || id.startsWith('@vitest/') || id.startsWith('vitest/')) {
         // always redirect the request to the root vitest plugin since
@@ -26,6 +34,14 @@ export function VitestCoreResolver(ctx: Vitest): Plugin {
   return {
     name: 'vitest:resolve-core',
     enforce: 'pre',
+    config: {
+      order: 'post',
+      handler() {
+        return {
+          base: '/',
+        }
+      },
+    },
     async resolveId(id) {
       if (id === 'vitest') {
         return resolve(distDir, 'index.js')

packages/vitest/src/node/plugins/workspace.ts

@@ -94,6 +94,7 @@ export function WorkspaceVitestPlugin(
         }
 
         return {
+          base: '/',
           environments: {
             __vitest__: {
               dev: {},

test/core/vite.config.ts

@@ -5,6 +5,8 @@ import { defaultExclude, defineConfig } from 'vitest/config'
 import { rolldownVersion } from 'vitest/node'
 
 export default defineConfig({
+  // tests should not fail when base is set
+  base: '/some-url/',
   plugins: [
     {
       name: 'example',