Added tests for parsing date

fints4k/src/commonMain/kotlin/net/codinux/banking/fints/transactions/mt940/Mt940Parser.kt

@@ -53,7 +53,7 @@ open class Mt940Parser(
 
         val DateFormatter = DateFormatter("yyMMdd") // TODO: replace with LocalDate.Format { }
 
-        val CurrentYearTwoDigit = LocalDate.todayAtEuropeBerlin().year - 2000
+        val CurrentYearTwoDigit = LocalDate.todayAtEuropeBerlin().year
 
         val CreditDebitCancellationRegex = Regex("C|D|RC|RD")
 
@@ -455,7 +455,7 @@ open class Mt940Parser(
         // this really simple date format on my own
         if (dateString.length == 6) {
             try {
-                var year = dateString.substring(0, 2).toInt()
+                var year = dateString.substring(0, 2).toInt() + 2000
                 val month = dateString.substring(2, 4).toInt()
                 val day = dateString.substring(4, 6).toInt()
 
@@ -463,7 +463,7 @@ open class Mt940Parser(
                     year -= 100
                 }
 
-                return LocalDate(year + 2000, month, day) // java.util.Date years start at 1900 at month at 0 not at 1
+                return LocalDate(year , month, day)
             } catch (e: Exception) {
                 logError("Could not parse dateString '$dateString'", e)
             }

fints4k/src/commonTest/kotlin/net/codinux/banking/fints/transactions/Mt940ParserTest.kt

@@ -38,7 +38,11 @@ class Mt940ParserTest : FinTsTestBase() {
         val AccountStatement1With2TransactionsClosingBalanceAmount = Amount("13148,13")
     }
 
-    private val underTest = Mt940Parser()
+    private val underTest = object : Mt940Parser() {
+        public override fun parseMt940Date(dateString: String): LocalDate {
+            return super.parseMt940Date(dateString)
+        }
+    }
 
 
     @Test
@@ -312,6 +316,21 @@ class Mt940ParserTest : FinTsTestBase() {
     }
 
 
+    @Test
+    fun parseDate() {
+        val result = underTest.parseMt940Date("240507")
+
+        assertEquals(LocalDate(2024, 5, 7), result)
+    }
+
+    @Test
+    fun parseDateBeforeYear2000() {
+        val result = underTest.parseMt940Date("990507")
+
+        assertEquals(LocalDate(1999, 5, 7), result)
+    }
+
+
     private fun assertBalance(balance: Balance, isCredit: Boolean, bookingDate: LocalDate, amount: Amount) {
         assertEquals(isCredit, balance.isCredit)
         assertEquals(bookingDate, balance.bookingDate)