[FIX] [BUG] Impossible d'ajouter un morceau #4

api/tests.php

@@ -175,6 +175,14 @@ class APITest {
     public function testCreateScoreWithPieces() {
         $this->section("Create Score with Pieces - Functional");
         
+        // Test 0: Try to create score with existing ID should fail
+        $result = $this->request('POST', 'admin/scores', [
+            'name' => 'Test Duplicate',
+            'compositor' => 'Test',
+            'id' => '001'
+        ]);
+        $this->test('Create with existing ID returns error', $result['code'] === 400 && isset($result['body']['error']));
+        
         // Test 1: Create score with 2 pieces
         $testName = 'Test Score ' . date('YmdHis');
         $result = $this->request('POST', 'admin/scores', [