validate day overflow

1 files changed, 10 insertions, 0 deletions

diff --git a/src/Q6/WeekDayTest.java b/src/Q6/WeekDayTest.java
index ddd4f56..281e39e 100644
--- a/src/Q6/WeekDayTest.java
+++ b/src/Q6/WeekDayTest.java
@@ -63,4 +63,14 @@ public class WeekDayTest extends TestCase {
   public void test_getWeekDay_2100_01_31() {
     assertEquals("Sunday", subject.getWeekDay(31, 1, 2100));
   }
+
+  public void test_getWeekDay_invalid_day() {
+    boolean raised = false;
+    try {
+      subject.getWeekDay(32, 1, 2100);
+    } catch (IllegalArgumentException error) {
+      raised = true;
+    }
+    assertTrue(raised);
+  }
 }