Introduce and use DateUtil.toSecondsPrecision

pgpainless-core/src/main/java/org/pgpainless/util/DateUtil.java

@@ -45,6 +45,16 @@ public final class DateUtil {
         return getParser().format(date);
     }
 
+    /**
+     * "Round" a date down to seconds precision.
+     * @param date
+     * @return
+     */
+    public static Date toSecondsPrecision(Date date) {
+        long seconds = date.getTime() / 1000;
+        return new Date(seconds * 1000);
+    }
+
     /**
      * Return the current date "rounded" to UTC precision.
      *

pgpainless-core/src/test/java/org/pgpainless/key/modification/ChangeExpirationOnKeyWithDifferentSignatureTypesTest.java

@@ -157,7 +157,7 @@ public class ChangeExpirationOnKeyWithDifferentSignatureTypesTest {
             throws PGPException {
         Date expirationDate = new Date(new Date().getTime() + 1000 * 60 * 60 * 24 * 14);
         // round date for test stability
-        expirationDate = DateUtil.parseUTCDate(DateUtil.formatUTCDate(expirationDate));
+        expirationDate = DateUtil.toSecondsPrecision(expirationDate);
 
         PGPSecretKeyRing modded = PGPainless.modifyKeyRing(keys)
                 .setExpirationDate(expirationDate, protector)

pgpainless-core/src/test/java/org/pgpainless/key/modification/RevokeKeyWithoutPreferredAlgorithmsOnPrimaryKey.java

@@ -100,7 +100,7 @@ public class RevokeKeyWithoutPreferredAlgorithmsOnPrimaryKey {
     @ExtendWith(TestAllImplementations.class)
     public void testChangingExpirationTimeWithKeyWithoutPrefAlgos()
             throws IOException, PGPException {
-        Date expirationDate = DateUtil.parseUTCDate(DateUtil.formatUTCDate(new Date()));
+        Date expirationDate = DateUtil.toSecondsPrecision(new Date());
         PGPSecretKeyRing secretKeys = PGPainless.readKeyRing().secretKeyRing(KEY);
 
         SecretKeyRingProtector protector = new UnprotectedKeysProtector();