Fixed that Sparkasse returns 30th of February or 29th of February also in non leap years

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

@@ -463,6 +463,10 @@ open class Mt940Parser(
                     year -= 100
                 }
 
+                if (month == 2 && (day > 29 || (day > 28 && year % 4 != 0))) {
+                    return LocalDate(year, 3, 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

@@ -330,6 +330,20 @@ class Mt940ParserTest : FinTsTestBase() {
         assertEquals(LocalDate(1999, 5, 7), result)
     }
 
+    @Test
+    fun parseDate_FixSparkasse29thOFFebruaryInNonLeapYearBug() {
+        val result = underTest.parseMt940Date("230229")
+
+        assertEquals(LocalDate(2023, 3, 1), result)
+    }
+
+    @Test
+    fun parseDate_FixSparkasse30thOfFebruaryBug() {
+        val result = underTest.parseMt940Date("230229")
+
+        assertEquals(LocalDate(2023, 3, 1), result)
+    }
+
 
     private fun assertBalance(balance: Balance, isCredit: Boolean, bookingDate: LocalDate, amount: Amount) {
         assertEquals(isCredit, balance.isCredit)