Add handy methods

FEA: ItEr67S04BugFixing

navalplanner-business/src/main/java/org/navalplanner/business/workingday/IntraDayDate.java

@@ -371,4 +371,20 @@ public class IntraDayDate implements Comparable<IntraDayDate> {
         return IntraDayDate.startOfDay(getDate().minusDays(1));
     }
 
+    /**
+     * @return the next day or the same day if this {@link IntraDayDate} has no
+     *         duration.
+     */
+    public LocalDate roundUp() {
+        return asExclusiveEnd();
+    }
+
+    /**
+     * @return A date resulting of striping this {@link IntraDayDate} of its
+     *         duration
+     */
+    public LocalDate roundDown() {
+        return date;
+    }
+
 }

navalplanner-business/src/test/java/org/navalplanner/business/test/workingday/IntraDayDateTest.java

@@ -278,4 +278,20 @@ public class IntraDayDateTest {
             }
         };
     }
+
+    @Test
+    public void roundsUpGoesToTheNextLocalDateOrKeepsTheSame() {
+        assertThat(IntraDayDate.create(today, halfHour).roundUp(),
+                equalTo(today.plusDays(1)));
+
+        assertThat(IntraDayDate.startOfDay(today).roundUp(), equalTo(today));
+    }
+
+    @Test
+    public void roundDownGoesToPreviousLocalDateOrKeepsTheSame() {
+        assertThat(IntraDayDate.create(today, halfHour).roundDown(),
+                equalTo(today));
+
+        assertThat(IntraDayDate.startOfDay(today).roundDown(), equalTo(today));
+    }
 }