test: add some unit tests for auth methods

tests/unit/auth/create-auth.ts

@@ -0,0 +1,21 @@
+import { drizzle } from "drizzle-orm/node-sqlite";
+import { migrate } from "drizzle-orm/node-sqlite/migrator";
+
+import { AuthService } from "~/server/web/auth";
+
+export function createTestAuth() {
+  const db = drizzle(":memory:");
+  migrate(db, { migrationsFolder: "./drizzle" });
+
+  const auth = new AuthService({
+    secret: "test-secret-key-for-unit-tests",
+    db,
+    cookie: {
+      name: "_hp_test",
+      secure: false,
+      maxAge: 3600,
+    },
+  });
+
+  return { auth, db };
+}