Fixes

Author: martijn00

lib/src/utils/validators.dart

@@ -438,11 +438,7 @@ bool isValidIban(String iban) {
   String rearranged = iban.substring(4) + iban.substring(0, 4);
   String numericIban = rearranged.split('').map((char) {
     int charCode = char.codeUnitAt(0);
-    if (charCode >= 65 && charCode <= 90) {
-      return (charCode - 55).toString(); // A=10, B=11, ..., Z=35
-    } else {
-      return char;
-    }
+    return charCode >= 65 && charCode <= 90 ? (charCode - 55).toString() : char;
   }).join();
 
   int remainder = int.parse(numericIban.substring(0, 9)) % 97;

test/form_builder_validators_test.dart

@@ -1108,4 +1108,25 @@ void main() {
       expect(validator(null), isNull); // Log message will be displayed
     }),
   );
+
+  testWidgets(
+    'FormBuilderValidators.iban',
+    (WidgetTester tester) => testValidations(tester, (context) {
+      final validator = FormBuilderValidators.iban();
+      // Pass
+      expect(validator('GB82WEST12345698765432'), isNull); // A valid UK IBAN
+      expect(
+          validator('DE89370400440532013000'), isNull); // A valid German IBAN
+      expect(validator('FR1420041010050500013M02606'),
+          isNull); // A valid French IBAN
+      expect(validator('GB82 WEST 1234 5698 7654 32'),
+          isNull); // Format with spaces
+
+      // Fail
+      //expect(validator(''), isNotNull); // Empty string
+      expect(validator('INVALIDIBAN'), isNotNull); // Invalid IBAN
+      expect(validator('GB82WEST1234569876543212345'), isNotNull); // Too long
+      expect(validator('GB82WEST1234'), isNotNull); // Too short
+    }),
+  );
 }