@@ -0,0 +1,1001 @@
+package seedu.ezdo.model.task;%0A%0Aimport static org.junit.Assert.assertFalse;%0Aimport static org.junit.Assert.assertTrue;%0A%0Aimport org.junit.Test;%0A%0Aimport seedu.ezdo.model.todo.DueDate;%0A%0Apublic class DueDateTest %7B%0A%0A    @Test%0A    public void isValidDueDate() %7B%0A        // invalid dates%0A        assertFalse(DueDate.isValidDueDate(%22%22)); // empty string%0A        assertFalse(DueDate.isValidDueDate(%22 %22)); // spaces only%0A        assertFalse(DueDate.isValidDueDate(%22priority%22)); // non-numeric%0A        assertFalse(DueDate.isValidDueDate(%2223 04 1995%22)); // spaces within digits%0A        assertFalse(DueDate.isValidDueDate(%2215.12.1945%22)); // fullstops within digits%0A        assertFalse(DueDate.isValidDueDate(%2220/01/p041%22)); // alphabets within digits%0A%0A        // valid dates%0A        assertTrue(DueDate.isValidDueDate(%2231/12/1993%22)); // month with 31 days%0A        assertTrue(DueDate.isValidDueDate(%2230/04/2016%22)); // month with 30 days%0A        assertTrue(DueDate.isValidDueDate(%2229/02/2016%22)); // leap year%0A    %7D%0A%7D%0A

Add DueDateTest.java; Update invalid dates & valid dates