Unit test for getter functions of CachedResultSet and added Timestamp support to CachedResultSet

fix: Add Timestamp support to CachedResultSet getTime() and getDate()

- Implement missing instanceof Timestamp cases in convertToTime() and convertToDate()
- Use new Time(timestamp.getTime()) and new Date(timestamp.getTime()) for standard JDBC behavior
- Add comprehensive test coverage for Timestamp conversion scenarios
- Fix object equality issues in tests by using consistent constructors

Resolves missing Timestamp handling that previously fell through to string parsing.

added more tests and cleaned up debug logs

removed uncessary imports, fixed testing logic for getTime() and getDate() and fixed implementation error for getBytes() and getBoolean() in the original codebase

updated future timestamp testing to make it more robust intead of hardcoding the future timestamp

updated convertToTime() to use static timezone offset -- functionality unchanged

Author: Frank-Gu-81

wrapper/src/main/java/software/amazon/jdbc/plugin/cache/CachedResultSet.java

@@ -38,6 +38,7 @@
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Calendar;
+import java.util.TimeZone;
 
 public class CachedResultSet implements ResultSet {
 
@@ -68,6 +69,7 @@ public Object get(final int columnIndex) throws SQLException {
   protected boolean wasNullFlag;
   private final CachedResultSetMetaData metadata;
   protected static final ZoneId defaultTimeZoneId = ZoneId.systemDefault();
+  protected static final TimeZone defaultTimeZone = TimeZone.getDefault();
   private final HashMap<String, Integer> columnNames;
   private volatile boolean closed;
 
@@ -178,7 +180,7 @@ public boolean getBoolean(final int columnIndex) throws SQLException {
     final Object val = checkAndGetColumnValue(columnIndex);
     if (val == null) return false;
     if (val instanceof Boolean) return (Boolean) val;
-    if (val instanceof Number) return ((Number) val).intValue() == 0;
+    if (val instanceof Number) return ((Number) val).intValue() != 0;
     return Boolean.parseBoolean(val.toString());
   }
 
@@ -251,7 +253,8 @@ public byte[] getBytes(final int columnIndex) throws SQLException {
     final Object val = checkAndGetColumnValue(columnIndex);
     if (val == null) return null;
     if (val instanceof byte[]) return (byte[]) val;
-    return new byte[0];
+    // Convert non-byte data to string, then to bytes (standard JDBC behavior)
+    return val.toString().getBytes();
   }
 
   private Date convertToDate(Object dateObj, Calendar cal) throws SQLException {
@@ -268,6 +271,14 @@ private Date convertToDate(Object dateObj, Calendar cal) throws SQLException {
       ZonedDateTime targetZonedDateTime = originalZonedDateTime.withZoneSameInstant(defaultTimeZoneId);
       return Date.valueOf(targetZonedDateTime.toLocalDate());
     }
+    if (dateObj instanceof Timestamp) {
+      Timestamp timestamp = (Timestamp) dateObj;
+      long millis = timestamp.getTime();
+      if (cal == null) return new Date(millis);
+      long adjustedMillis = millis - cal.getTimeZone().getOffset(millis)
+          + defaultTimeZone.getOffset(millis);
+      return new Date(adjustedMillis);
+    }
 
     // Note: normally the user should properly store the Date object in the DB column and
     // the underlying PG/MySQL/MariaDB driver would convert it into Date already in getObject()
@@ -302,6 +313,14 @@ private Time convertToTime(Object timeObj, Calendar cal) throws SQLException {
       OffsetTime localTime = ((OffsetTime)timeObj).withOffsetSameInstant(OffsetDateTime.now().getOffset());
       return Time.valueOf(localTime.toLocalTime());
     }
+    if (timeObj instanceof Timestamp) {
+      Timestamp timestamp = (Timestamp) timeObj;
+      long millis = timestamp.getTime();
+      if (cal == null) return new Time(millis);
+      long adjustedMillis = millis - cal.getTimeZone().getOffset(millis)
+          + defaultTimeZone.getOffset(millis);
+      return new Time(adjustedMillis);
+    }
 
     // Note: normally the user should properly store the Time object in the DB column and
     // the underlying PG/MySQL/MariaDB driver would convert it into Time already in getObject()