import java.util.NoSuchElementException;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;
import static org.junit.Assert.*;
import org.junit.Rule;
import org.junit.rules.ExpectedException;

/**
 *
 * @author Peter Cappello
 */
public class QueueTest 
{
    private Queue<Integer> instance  = new Queue<>();
    
    public QueueTest() {}
    
    @BeforeClass
    public static void setUpClass() {}
    
    @AfterClass
    public static void tearDownClass() {}
    
    @Rule
    public ExpectedException exception = ExpectedException.none();

    /**
     * Test of isEmpty method of class Queue on empty Q.
     */
    @Test
    public void testIsEmptyTrue() 
    {
        System.out.println("isEmpty");
        assertTrue( instance.isEmpty() );
    }
    
    /**
     * Test of isEmpty method of class Queue on non-empty Q.
     */
    @Test
    public void testIsEmptyFalse() 
    {
        System.out.println("isEmpty");
        instance.add( 1 );
        assertFalse( instance.isEmpty() );
    }

    /**
     * Test of remove method of class Queue.
     */
    @Test
    public void testRemove() 
    {
        System.out.println("remove");
        instance.add( 1 );
        assertEquals( new Integer( 1 ), instance.remove() );
    }
    
    /**
     * Test of remove method of class Stack.
     */
    @Test
    public void testRemoveException() 
    {
        System.out.println("remove");
        exception.expect( NoSuchElementException.class );
        Integer peek = instance.remove();
    }

    /**
     * Test of add method of class Queue.
     */
    @Test
    public void testAdd() 
    {
        System.out.println("add");
        instance.add( -17 );
        assertEquals( instance.peek(), new Integer( -17 ) );
    }

    /**
     * Test of peek method of class Queue.
     */
    @Test
    public void testPeek() 
    {
        System.out.println("peek");
        instance.add( 1 );
        assertEquals( new Integer( 1 ), instance.peek() );
    }
}