### Question:
BinaryTree { public synchronized void setNotEqual(BinaryTree notEqual) { this.notEqual = notEqual; } BinaryTree(int value); synchronized int getValue(); synchronized BinaryTree getEqual(); synchronized void setEqual(BinaryTree equal); synchronized BinaryTree getNotEqual(); synchronized void setNotEqual(BinaryTree notEqual);  }### Answer:
@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); }