import static org.junit.Assert.*;
import org.junit.*;
import java.util.*;

/**
 * JUnit Test Cases for Min
 * see also Min.java and AllTests.java
 * @author Paul Ammann 
 *
 */
public class MinTest {

	List list;
	/**
	 * Sets up the test fixture. (Called before every test case method.)
	 */
	@Before
	public void setUp() {
		list = new Vector();
	}

	/**
	 * Tears down the test fixture. (Called after every test case method.)
	 */
	@After
	public void tearDown() {
 		list = null;
	}

	/**
	 * Tests null list argument
	 */
	@Test(expected = NullPointerException.class)
	public void testForNullList() {
		Object obj = Min.min(null);
	}

	/**
	 * Tests null list element (first and only position)
	 */
	@Test(expected = NullPointerException.class)
	public void testForNullElement1() {
                list.add(null);
		Object obj = Min.min(list);
	}

	/**
	 * Tests null list element (first of several positions)
	 */
	@Test(expected = NullPointerException.class)
	public void testForNullElement2() {
                list.add(null);
                list.add("cat");
		Object obj = Min.min(list);
	}

	/**
	 * Tests null list element (second of several positions)
	 */
	@Test(expected = NullPointerException.class)
	public void testForNullElement3() {
                list.add("cat");
                list.add(null);
                list.add("dog");
		Object obj = Min.min(list);
	}

	/**
	 * Tests incomparable elements
	 */
	@Test(expected = ClassCastException.class)
	public void testMutuallyIncomparable() {
                list.add("cat");
                list.add("dog");
                list.add(1);
		Object obj = Min.min(list);
	}

	/**
	/**
	 * Tests empty list 
	 */
	@Test(expected = IllegalArgumentException.class)
	public void testEmptyList() {
		Object obj = Min.min(list);
	}

	/**
	 * Tests for normal case with single element list
	 */
	@Test
	public void testSingleElement() {
		list.add("cat");
		Object obj = Min.min(list);
		assertTrue(obj.equals("cat"));
	}

	/**
	 * Tests for normal case with double element list
	 */
	@Test
	public void testDoubleElement() {
		list.add("dog");
		list.add("cat");
		Object obj = Min.min(list);
		assertTrue(obj.equals("cat"));
	}
}