PDFBOX-5660: increase coverage

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1924676 13f79535-47bb-0310-9956-ffa450edef68

Author: THausherr

xmpbox/src/test/java/org/apache/xmpbox/DateConverterTest.java

@@ -21,7 +21,10 @@
 
 package org.apache.xmpbox;
 
+import java.io.IOException;
+
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
 
 import java.text.SimpleDateFormat;
 import java.time.ZonedDateTime;
@@ -52,6 +55,11 @@ void testDateConversion() throws Exception
         Calendar convDate = DateConverter.toCalendar("2015-02-02");
         assertEquals(2015, convDate.get(Calendar.YEAR));
 
+        convDate = DateConverter.toCalendar("D:2015-02-02");
+        assertEquals(2015, convDate.get(Calendar.YEAR));
+
+        assertThrows(IOException.class, () -> DateConverter.toCalendar("123"));
+
         //Test missing seconds
         assertEquals(DateConverter.toCalendar("2015-12-08T12:07:00-05:00"),
                      DateConverter.toCalendar("2015-12-08T12:07-05:00"));