test: migrate to Vitest inline projects

package.json

@@ -17,11 +17,11 @@
     "format": "prettier --write --cache .",
     "format-check": "prettier --check --cache .",
     "test": "vitest",
-    "test-unit": "vitest --project unit",
+    "test-unit": "vitest --project unit*",
     "test-e2e": "node scripts/build.js vue -f global -d && vitest --project e2e",
     "test-dts": "run-s build-dts test-dts-only",
     "test-dts-only": "tsc -p packages-private/dts-built-test/tsconfig.json && tsc -p ./packages-private/dts-test/tsconfig.test.json",
-    "test-coverage": "vitest run --project unit --coverage",
+    "test-coverage": "vitest run --project unit* --coverage",
     "prebench": "node scripts/build.js -pf esm-browser reactivity",
     "prebench-compare": "node scripts/build.js -pf esm-browser reactivity",
     "bench": "vitest bench --project=unit --outputJson=temp/bench.json",

vitest.config.ts

@@ -1,4 +1,4 @@
-import { defineConfig } from 'vitest/config'
+import { configDefaults, defineConfig } from 'vitest/config'
 import { entries } from './scripts/aliases.js'
 
 export default defineConfig({
@@ -25,9 +25,6 @@ export default defineConfig({
     globals: true,
     pool: 'threads',
     setupFiles: 'scripts/setup-vitest.ts',
-    environmentMatchGlobs: [
-      ['packages/{vue,vue-compat,runtime-dom}/**', 'jsdom'],
-    ],
     sequence: {
       hooks: 'list',
     },
@@ -49,5 +46,41 @@ export default defineConfig({
         'packages/runtime-dom/src/components/Transition*',
       ],
     },
+
+    projects: [
+      {
+        extends: true,
+        test: {
+          name: 'unit',
+          exclude: [
+            ...configDefaults.exclude,
+            '**/e2e/**',
+            '**/{vue,vue-compat,runtime-dom}/**',
+          ],
+        },
+      },
+      {
+        extends: true,
+        test: {
+          name: 'unit-jsdom',
+          include: ['packages/{vue,vue-compat,runtime-dom}/**/*.{test,spec}.*'],
+          exclude: [...configDefaults.exclude, '**/e2e/**'],
+          environment: 'jsdom',
+        },
+      },
+      {
+        extends: true,
+        test: {
+          name: 'e2e',
+          environment: 'jsdom',
+          poolOptions: {
+            threads: {
+              singleThread: !!process.env.CI,
+            },
+          },
+          include: ['packages/vue/__tests__/e2e/*.spec.ts'],
+        },
+      },
+    ],
   },
 })