add test for hashcode/equals with sorted and unsorted lists

primitiveCollections/src/test/java/org/lucares/collections/IntListTest.java

@@ -516,6 +516,7 @@ public class IntListTest {
 		Assert.assertTrue(list.isSorted());
 	}
 
+	@SuppressWarnings("unlikely-arg-type")
 	@Test
 	public void testHashCodeEquals() {
 		final IntList a = new IntList();
@@ -537,8 +538,6 @@ public class IntListTest {
 		Assert.assertTrue(a.equals(b));
 		Assert.assertEquals(a.hashCode(), b.hashCode());
 
-		// TODO sorted and unsorted lists with same length
-
 		// change one value
 		a.remove(2, 3);
 		a.insert(2, 99);
@@ -558,6 +557,12 @@ public class IntListTest {
 
 		// equals with a different class
 		Assert.assertFalse(a.equals("not an IntList"));
+
+		// sorted and unsorted lists with same length
+		final IntList sorted = IntList.of(1, 2, 3, 4);
+		final IntList unsorted = IntList.of(4, 3, 2, 1);
+		Assert.assertFalse(sorted.equals(unsorted));
+		Assert.assertNotEquals(sorted.hashCode(), unsorted.hashCode());
 	}
 
 	@Test