fix(registry): patch Finland bank code to 6 digits (#257)

src/IbanNet.CodeGen/Swift/Patches/9_FinlandBankCodePatch.cs

@@ -0,0 +1,21 @@
+namespace IbanNet.CodeGen.Swift.Patches;
+
+internal sealed class _9_FinlandBankCodePatch : RecordPatcher
+{
+    protected override SwiftCsvRecord Apply(SwiftCsvRecord record)
+    {
+        switch (record)
+        {
+            case { CountryCode: "FI" }:
+                record.Bban.Pattern = "6!n8!n";
+                record.Bban.Example = "12345600000785";
+                record.Bank.Pattern = "6!n";
+                record.Bank.Example = "123456";
+
+                return record;
+
+            default:
+                return record;
+        }
+    }
+}

src/IbanNet.CodeGen/Swift/Patches/RecordPatcher.cs

@@ -19,6 +19,7 @@ private static IEnumerable<RecordPatcher> GetPatches()
                 .Where(t => !t.IsAbstract && typeof(RecordPatcher).IsAssignableFrom(t))
                 .Select(Activator.CreateInstance)
                 .Cast<RecordPatcher>()
+                .OrderBy(rp => rp.GetType().Name)
                 .ToList();
     }
 }

src/IbanNet/Registry/Swift/SwiftRegistryProvider.cs

@@ -692,13 +692,13 @@ private static IEnumerable<IbanCountry> Load()
                 Example = "FI2112345600000785",
                 EffectiveDate = new DateTimeOffset(2011, 12, 1, 0, 0, 0, TimeSpan.Zero)
             },
-            Bban = new BbanStructure(new SwiftPattern("3!n11!n"), 4)
+            Bban = new BbanStructure(new SwiftPattern("6!n8!n"), 4)
             {
-                Example = ""
+                Example = "12345600000785"
             },
-            Bank = new BankStructure(new SwiftPattern("3!n"), 4)
+            Bank = new BankStructure(new SwiftPattern("6!n"), 4)
             {
-                Example = "123"
+                Example = "123456"
             },
             Sepa = new SepaInfo
             {

test/IbanNet.Tests/Issues/224_FinlandBankCode.cs

@@ -0,0 +1,21 @@
+using IbanNet.Registry;
+
+namespace IbanNet.Issues;
+
+public sealed class _224_FinlandBankCode
+{
+    [Theory]
+    [InlineData("FI4017453000182859", "174530")]
+    [InlineData("FI2840554920113105", "405549")]
+    public void When_extracting_bank_code_it_should_return_expected(string ibanStr, string expectedBankCode)
+    {
+        var ibanParser = new IbanParser(IbanRegistry.Default);
+
+        // Act
+        bool isValid = ibanParser.TryParse(ibanStr, out Iban? iban);
+
+        // Assert
+        isValid.Should().BeTrue();
+        iban!.BankIdentifier.Should().Be(expectedBankCode);
+    }
+}