1 files changed, 21 insertions, 0 deletions
diff --git a/frontend/src/lib/__tests__/state.test.ts b/frontend/src/lib/__tests__/state.test.ts
new file mode 100644
index 0000000..245c38c
--- /dev/null
+++ b/frontend/src/lib/__tests__/state.test.ts
@@ -0,0 +1,21 @@
+import { describe, expect, it, vi, afterEach } from 'vitest';
+import { extractStatusMessage } from '../state';
+
+afterEach(() => vi.unstubAllGlobals());
+
+describe('extractStatusMessage', () => {
+  it('prefers ApiError.code-mapped Chinese text', () => {
+    const msg = extractStatusMessage({
+      status: 409,
+      code: 'stale_generation',
+      message: '草稿已被其他修改更新'
+    });
+    expect(msg).toContain('409');
+    expect(msg).toContain('草稿已被其他修改更新');
+  });
+
+  it('handles unknown errors without leaking internals', () => {
+    const msg = extractStatusMessage({ message: 'boom' });
+    expect(msg).toContain('出错');
+  });
+});