Fix for mauricio#240, also added some tests

postgresql-async/src/main/scala/com/github/mauricio/async/db/postgresql/column/PostgreSQLTimestampEncoderDecoder.scala

@@ -39,7 +39,7 @@ object PostgreSQLTimestampEncoderDecoder extends ColumnEncoderDecoder {
     index =>
       new DateTimeFormatterBuilder()
         .appendPattern("yyyy-MM-dd HH:mm:ss")
-        .appendPattern("." + ("S" * index ))
+        .appendOptional(new DateTimeFormatterBuilder().appendPattern("." + ("S" * index )).toParser)
         .appendOptional(optionalTimeZone)
         .toFormatter
   }

postgresql-async/src/test/scala/com/github/mauricio/async/db/postgresql/column/PostgreSQLTimestampEncoderDecoderSpec.scala

@@ -0,0 +1,45 @@
+package com.github.mauricio.async.db.postgresql.column
+
+import com.github.mauricio.async.db.postgresql.messages.backend.PostgreSQLColumnData
+import io.netty.buffer.Unpooled
+import io.netty.util.CharsetUtil
+import org.joda.time
+import org.joda.time.DateTimeZone
+import org.specs2.mutable.Specification
+
+class PostgreSQLTimestampEncoderDecoderSpec extends Specification {
+
+  def execute( columnType:Int, data : String ) : Any = {
+    val date = data.getBytes( CharsetUtil.UTF_8 )
+    PostgreSQLTimestampEncoderDecoder.decode(
+      PostgreSQLColumnData("name",1,1,columnType,1,1,1),
+      Unpooled.wrappedBuffer(date), CharsetUtil.UTF_8)
+  }
+
+  "encoder/decoder" should {
+
+    "parse a date" in {
+      val localDateTime = execute(ColumnTypes.Timestamp, "2018-08-15 18:26:36").asInstanceOf[time.LocalDateTime]
+      localDateTime.getYear === 2018
+      localDateTime.getMonthOfYear === 8
+      localDateTime.getDayOfMonth === 15
+      localDateTime.getHourOfDay === 18
+      localDateTime.getMinuteOfHour === 26
+      localDateTime.getSecondOfMinute === 36
+
+    }
+
+    "parse a date with timezone" in {
+      DateTimeZone.setDefault(DateTimeZone.UTC)
+      val dateTime = execute(ColumnTypes.TimestampWithTimezone, "2018-08-15 18:26:36+08").asInstanceOf[time.DateTime]
+      dateTime.getYear === 2018
+      dateTime.getMonthOfYear === 8
+      dateTime.getDayOfMonth === 15
+      dateTime.getHourOfDay === 10
+      dateTime.getMinuteOfHour === 26
+      dateTime.getSecondOfMinute === 36
+    }
+
+  }
+
+}