From a1491cdb5a0dc9c0c074924b8a1f714b76ef7114 Mon Sep 17 00:00:00 2001
From: "borja (aider)" <borja@brobert.net>
Date: Mon, 31 Mar 2025 14:20:01 +0200
Subject: [PATCH] test: add duplicate user ID constraint test

---
 tests/unit/db.test.ts | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/tests/unit/db.test.ts b/tests/unit/db.test.ts
index 9412a60..27d17f9 100644
--- a/tests/unit/db.test.ts
+++ b/tests/unit/db.test.ts
@@ -76,6 +76,29 @@ describe('Database', () => {
     });
   });
 
+  describe('User Operations', () => {
+    test('should reject duplicate user IDs', () => {
+      // First insert should succeed
+      const firstInsert = db.prepare(`
+        INSERT INTO users (id) VALUES ('34650112233')
+      `).run();
+      expect(firstInsert.changes).toBe(1);
+
+      // Second insert with same ID should fail
+      expect(() => {
+        db.prepare(`
+          INSERT INTO users (id) VALUES ('34650112233')
+        `).run();
+      }).toThrow();
+
+      // Verify only one record exists
+      const count = db.prepare(`
+        SELECT COUNT(*) as count FROM users WHERE id = '34650112233'
+      `).get();
+      expect(count.count).toBe(1);
+    });
+  });
+
   describe('Data Operations', () => {
     beforeEach(() => {
       db.exec(`