swedish ssn cannot have format like XXXXXX-000X

src/main/java/net/datafaker/idnumbers/SwedenIdNumber.java

@@ -37,14 +37,18 @@ public String getValidSsn(BaseProviders f) {
     @Override
     public PersonIdNumber generateValid(BaseProviders f, IdNumber.IdNumberRequest request) {
         LocalDate birthday = birthday(f, request);
-        String end = f.numerify("###");
+        String end = generateEndPart(f);
         String basePart = DATE_TIME_FORMATTER.format(birthday)
             + f.options().option(PLUS_MINUS)
             + end;
         String idNumber = basePart + calculateChecksum(basePart);
         return new PersonIdNumber(idNumber, birthday, gender(f, request));
     }
 
+    public static String generateEndPart(BaseProviders f) {
+        return "%03d".formatted(f.number().numberBetween(1, 1000));
+    }
+
     @Deprecated
     public String getInvalidSsn(BaseProviders f) {
         return generateInvalid(f);
@@ -78,6 +82,10 @@ public static boolean isValidSwedishSsn(String ssn) {
             return false;
         }
 
+        if (ssn.startsWith("000", 7)) {
+            return false;
+        }
+
         int calculatedChecksum = calculateChecksum(ssn);
         int checksum = Integer.parseInt(ssn.substring(10, 11));
         return checksum == calculatedChecksum;

src/test/java/net/datafaker/idnumbers/SwedishIdNumberTest.java

@@ -14,6 +14,7 @@ void validSwedishSsn() {
 
     @Test
     void invalidSwedishSsn() {
+        assertThat(SwedenIdNumber.isValidSwedishSsn("020914-0003")).isFalse();
         assertThat(SwedenIdNumber.isValidSwedishSsn("8112289873")).isFalse();
         assertThat(SwedenIdNumber.isValidSwedishSsn("foo228-9873")).isFalse();
         assertThat(SwedenIdNumber.isValidSwedishSsn("811228-9873")).isFalse();