Various bug fixes in CronExpression

This commit makes various bug fixes in CronExpression and related files.

Closes gh-27136

spring-context/src/main/java/org/springframework/scheduling/support/CronExpression.java

@@ -66,8 +66,9 @@ public final class CronExpression {
 			CronField daysOfWeek,
 			String expression) {
 
+		// reverse order, to make big changes first
 		// to make sure we end up at 0 nanos, we add an extra field
-		this.fields = new CronField[]{CronField.zeroNanos(), seconds, minutes, hours, daysOfMonth, months, daysOfWeek};
+		this.fields = new CronField[]{daysOfWeek, months, daysOfMonth, hours, minutes, seconds, CronField.zeroNanos()};
 		this.expression = expression;
 	}
 

spring-context/src/main/java/org/springframework/scheduling/support/CronField.java

@@ -230,9 +230,7 @@ abstract class CronField {
 		 * Elapse the given temporal for the difference between the current
 		 * value of this field and the goal value. Typically, the returned
 		 * temporal will have the given goal as the current value for this type,
-		 * but this is not the case for {@link #DAY_OF_MONTH}. For instance,
+		 * but this is not the case for {@link #DAY_OF_MONTH}.
-		 * if {@code goal} is 31, and {@code temporal} is April 16th,
-		 * this method returns May 1st, because April 31st does not exist.
 		 * @param temporal the temporal to elapse
 		 * @param goal the goal value
 		 * @param <T> the type of temporal
@@ -247,8 +245,9 @@ abstract class CronField {
 					return cast(temporal.with(this.field, goal));
 				}
 				else {
-					// goal is invalid, eg. 29th Feb, lets try to get as close as possible
+					// goal is invalid, eg. 29th Feb, so roll forward
-					return this.field.getBaseUnit().addTo(temporal, goal - current);
+					long amount = range.getMaximum() - current + 1;
+					return this.field.getBaseUnit().addTo(temporal, amount);
 				}
 			}
 			else {

spring-context/src/main/java/org/springframework/scheduling/support/QuartzCronField.java

@@ -334,6 +334,9 @@ final class QuartzCronField extends CronField {
 				// We ended up before the start, roll forward and try again
 				temporal = this.rollForwardType.rollForward(temporal);
 				result = adjust(temporal);
+				if (result != null) {
+					result = type().reset(result);
+				}
 			}
 		}
 		return result;

spring-context/src/test/java/org/springframework/scheduling/support/CronExpressionTests.java

@@ -1319,6 +1319,21 @@ class CronExpressionTests {
 		assertThat(actual).isEqualTo(expected);
 	}
 
+	@Test
+	public void various() {
+		CronExpression cronExpression = CronExpression.parse("3-57 13-28 17,18 1,15 3-12 6#1");
+		LocalDateTime last =     LocalDateTime.of(2022, 9, 15, 17, 44, 11);
+		LocalDateTime expected = LocalDateTime.of(2022, 10, 1, 17, 13, 3);
+		LocalDateTime actual = cronExpression.next(last);
+		assertThat(actual).isNotNull();
+		assertThat(actual).isEqualTo(expected);
 
+		cronExpression = CronExpression.parse("*/28 56 22 */6 * *");
+		last = LocalDateTime.of(2022, 2, 27, 8, 0, 42);
+		expected = LocalDateTime.of(2022, 3, 1, 22, 56, 0);
+		actual = cronExpression.next(last);
+		assertThat(actual).isNotNull();
+		assertThat(actual).isEqualTo(expected);
+	}
 
 }