Add test for open ended date range

Author: simonpoole

src/test/java/ch/poole/openinghoursparser/UnitTest.java

@@ -298,6 +298,20 @@ public void dateWithOffset() {
 
     }
 
+    @Test
+    public void openEndedDateRange() {
+        OpeningHoursParser parser = new OpeningHoursParser(new ByteArrayInputStream("Jan 31+ Mo".getBytes()));
+        try {
+            List<Rule> rules = parser.rules(false);
+            assertEquals(1, rules.size());
+            List<DateRange> dateRanges = rules.get(0).getDates();
+            assertEquals(1, dateRanges.size());
+            assertTrue(dateRanges.get(0).getStartDate().isOpenEnded());
+        } catch (ParseException pex) {
+            fail(pex.getMessage());
+        }
+    }
+
     @Test
     /**
      * This doesn't seem to turn up in our test data