fix: vitest config

Author: openscript

tsconfig.json

@@ -10,8 +10,5 @@
   "compilerOptions": {
     "moduleResolution": "bundler",
     "exactOptionalPropertyTypes": false,
-    "types": [
-      "unplugin-icons/types/astro"
-    ],
   }
 }

vitest.config.ts

@@ -1,14 +1,17 @@
-// eslint-disable-next-line @typescript-eslint/triple-slash-reference
-/// <reference types="vitest/config" />
 import { getViteConfig } from "astro/config";
-import { coverageConfigDefaults } from "vitest/config";
+import { coverageConfigDefaults, mergeConfig } from "vitest/config";
+import type { ConfigEnv } from "vitest/config";
+
+const astroConfig = getViteConfig({});
 
 // see https://docs.astro.build/en/guides/testing/
-export default getViteConfig({
-  test: {
-    unstubEnvs: true,
-    coverage: {
-      exclude: ["astro.config.ts", "**/*.astro", ...coverageConfigDefaults.exclude],
+export default async (env: ConfigEnv) => {
+  return mergeConfig(await astroConfig(env), {
+    test: {
+      unstubEnvs: true,
+      coverage: {
+        exclude: ["astro.config.ts", "**/*.astro", ...coverageConfigDefaults.exclude],
+      },
     },
-  },
-});
+  });
+};