@Test
public void testSetNotEqual() {

    BinaryTree instance = new BinaryTree(15);
    BinaryTree equal = new BinaryTree(15);
    BinaryTree notEqual = new BinaryTree(10);
    instance.setEqual(equal);
    instance.setNotEqual(notEqual);
    BinaryTree expResult = notEqual;
    BinaryTree result = instance.getNotEqual();
    assertEquals(expResult, result);
}