Make Appointment unit tests

src/test/java/seedu/address/model/person/AppointmentTest.java

@@ -0,0 +1,80 @@
+package seedu.address.model.person;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.junit.jupiter.api.Test;
+
+public class AppointmentTest {
+
+    @Test
+    public void equals() {
+        Appointment firstAppointment = new Appointment("01-01-2024 12:00");
+        Appointment secondAppointment = new Appointment("02-02-2024 15:00");
+
+        // same object -> returns true
+        assertTrue(firstAppointment.equals(firstAppointment));
+
+        // same values -> returns true
+        Appointment firstAppointmentCopy = new Appointment("01-01-2024 12:00");
+        assertTrue(firstAppointment.equals(firstAppointmentCopy));
+
+        // different types -> returns false
+        assertFalse(firstAppointment.equals(1));
+
+        // null -> returns false
+        assertFalse(firstAppointment.equals(null));
+
+        // different appointments -> returns false
+        assertFalse(firstAppointment.equals(secondAppointment));
+    }
+
+    @Test
+    public void test_toString_returnsCorrectFormat() {
+        Appointment appointment = new Appointment("01-01-2024 12:00");
+        assertEquals("01-01-2024 12:00", appointment.toString());
+    }
+
+    @Test
+    public void test_equalsSymmetry() {
+        Appointment appointmentA = new Appointment("03-03-2024 09:00");
+        Appointment appointmentB = new Appointment("03-03-2024 09:00");
+
+        // Symmetry: a.equals(b) == b.equals(a)
+        assertTrue(appointmentA.equals(appointmentB));
+        assertTrue(appointmentB.equals(appointmentA));
+    }
+
+    @Test
+    public void test_appointmentMatchesDateTime() {
+        // Check if the date and time matches after construction
+        Appointment appointment = new Appointment("15-08-2024 18:30");
+        assertEquals("15-08-2024 18:30", appointment.toString());
+    }
+
+    @Test
+    public void test_appointmentDoesNotMatchDifferentDateTime() {
+        // Check that two different appointments are not considered equal
+        Appointment appointment1 = new Appointment("10-01-2024 14:00");
+        Appointment appointment2 = new Appointment("10-02-2024 14:00");
+
+        assertFalse(appointment1.equals(appointment2));
+    }
+
+    @Test
+    public void test_hashCodeConsistency() {
+        Appointment appointment = new Appointment("01-04-2024 11:30");
+
+        // Same object should return the same hashCode
+        assertEquals(appointment.hashCode(), appointment.hashCode());
+    }
+
+    @Test
+    public void test_toStringMethod() {
+        Appointment appointment = new Appointment("25-12-2024 09:00");
+
+        String expected = "25-12-2024 09:00";
+        assertEquals(expected, appointment.toString());
+    }
+}