improvements and fixing of the tests

server/tests/table_definition/post_table_definition_test3.rs

@@ -173,26 +173,24 @@ async fn test_fail_on_true_self_referential_link(#[future] pool: PgPool) {
 #[tokio::test]
 async fn test_behavior_on_empty_profile_name(#[future] pool: PgPool) {
     // Scenario: Attempt to create a table with an empty profile name.
-    // Expected: This should violate the database's NOT NULL constraint on profiles.name.
+    // Expected: This should be rejected by input validation.
     let pool = pool.await;
     let request = PostTableDefinitionRequest {
         profile_name: "".into(),
         table_name: "table_in_empty_profile".into(),
         ..Default::default()
     };
-
     // Act
     let result = post_table_definition(&pool, request).await;
-
     // Assert
     let err = result.unwrap_err();
     assert_eq!(
         err.code(),
-        Code::Internal,
-        "Expected Internal error from DB constraint violation"
+        Code::InvalidArgument,  // Changed from Internal
+        "Expected InvalidArgument error from input validation"
     );
     assert!(
-        err.message().to_lowercase().contains("profile error"),
+        err.message().contains("Profile name cannot be empty"),  // Updated message
         "Unexpected error message: {}",
         err.message()
     );