fix tests

Author: Tsche

tests/startup-attempt.test.ts

@@ -1,3 +1,5 @@
+// @vitest-environment happy-dom
+
 import { beforeEach, describe, expect, it } from "vitest";
 import { beginStartupAttempt } from "../src/startup-attempt";
 

vitest.config.ts

@@ -0,0 +1,7 @@
+import { defineConfig } from "vitest/config";
+
+export default defineConfig({
+  test: {
+    include: ["tests/**/*.test.ts"],
+  },
+});