코드체크 실패 케이스 해결. 배치잡 야간 배정

adminfront/src/lib/utils.test.ts

@@ -1,5 +1,10 @@
-import { describe, expect, it } from "vitest";
-import { cn } from "./utils";
+import { afterEach, describe, expect, it, vi } from "vitest";
+import { cn, generateSecurePassword } from "./utils";
+
+afterEach(() => {
+  vi.restoreAllMocks();
+  vi.unstubAllGlobals();
+});
 
 describe("cn utility", () => {
   it("merges class names correctly", () => {
@@ -11,3 +16,23 @@ describe("cn utility", () => {
     expect(cn("px-2 py-2", "px-4")).toBe("py-2 px-4");
   });
 });
+
+describe("generateSecurePassword", () => {
+  it("uses crypto random values when available", () => {
+    vi.stubGlobal("crypto", {
+      getRandomValues: vi.fn((values: Uint32Array) => {
+        values.set([0, 1, 2, 3]);
+        return values;
+      }),
+    });
+
+    expect(generateSecurePassword(4)).toBe("abcd");
+  });
+
+  it("falls back to Math.random when crypto is unavailable", () => {
+    vi.stubGlobal("crypto", undefined);
+    vi.spyOn(Math, "random").mockReturnValue(0);
+
+    expect(generateSecurePassword(3)).toBe("aaa");
+  });
+});