import static org.junit.Assert.*;
import org.junit.Test;

/**
 * The test class IfZeroTest.
 * Only check `equals` and `hashCode`;
 * testing of higher-liphl functions all in `class ExprTest`.
 * 
 * @author ibarland@radford.edu
 * @license CC0; please just site URL, e.g. http://www.radford.edu/itec380/2019spring-ibarland/Homeworks/Project/X0-java/
 * @version 2018.Nov.16
 */
public class IfZeroTest {
    
    @Test
    public void equalsTest() {
      IfZero e1 = new IfZero( new Num(3), new Num(4), new Num(5) );
      IfZero e2 = new IfZero( new Num(3), new Num(4), new Num(5) );
      IfZero e3 = new IfZero( new Num(7), new Num(4), new Num(5) );
      assertEquals(e1,e1);
      assertEquals(e1,e2);
      assertFalse( e1.equals(e3) );
      assertEquals( e1.hashCode(), e1.hashCode() );
      assertEquals( e1.hashCode(), e2.hashCode() );
      assertFalse(  e1.hashCode() == e3.hashCode() );
      }
    
    }