See class comments

AssassinManagerTest.java

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;

import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.util.ArrayList;
import java.util.Arrays;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;

/**
 * JUnit tests for the AssassinManager class.
 * 
 * NOTE: This test suite will *not* work properly if you use 'println' in your
 * AssassinManager methods. Use 'printf' with '\n' for newlines instead. (
 * credit: http://www.cis.upenn.edu
 * /~matuszek/cit594-2008/Lectures/28-junit-for-output.ppt)
 * 
 * I'm pretty certain if you fail any of these tests, something is wrong with
 * your code. However, if you pass all of them, no guarantees that your code is
 * 100% correct.
 * 
 * @author Kevin Vu
 */
public class AssassinManagerTest {

	private static AssassinManager manager;

	// Workaround for testing print output:
	// http://stackoverflow.com/questions/1119385/junit-test-for-system-out-println
	private final ByteArrayOutputStream outContent = new ByteArrayOutputStream();

	// Redirect stdout to outContent. Setup an AssassinManager.
	@Before
	public void setUpBefore() throws Exception {
		System.setOut(new PrintStream(outContent));
		manager = new AssassinManager(new ArrayList<String>(
				Arrays.asList(new String[] { "bob", "lisa", "tom" })));
	}

	// Reset stdout.
	@After
	public void cleanUpStreams() {
		System.setOut(System.out);
	}

	@Test(expected = IllegalArgumentException.class)
	public void testAssassinManagerConstructor1() {
		new AssassinManager(null);
	}

	@Test(expected = IllegalArgumentException.class)
	public void testAssassinManagerConstructor2() {
		new AssassinManager(new ArrayList<String>());
	}

	@Test
	public void testIsGameOverAndWinner() {
		assertNull(manager.winner());
		assertTrue(!manager.isGameOver());
		manager.kill("Bob");
		manager.kill("lisa");
		assertTrue(manager.isGameOver());
		assertEquals("tom", manager.winner());
	}

	@Test
	public void testContains() {
		assertTrue(manager.killRingContains("bOB"));
		assertTrue(!manager.killRingContains("jessica"));
		manager.kill("bob");
		assertTrue(!manager.killRingContains("bOb"));
		assertTrue(manager.graveyardContains("Bob"));
		assertTrue(!manager.graveyardContains("jessica"));
	}

	@Test
	public void testPrintKillRing() {
		manager.printKillRing();
		String expected = "  bob is stalking lisa\n  lisa is stalking tom\n  tom is stalking bob\n";
		assertEquals(expected, outContent.toString());
	}

	@Test
	public void testKillFront() {
		manager.kill("Bob");
		manager.printKillRing();
		manager.printGraveyard();
		String expected = "  lisa is stalking tom\n  tom is stalking lisa\n  bob was killed by tom\n";
		assertEquals(expected, outContent.toString());
	}

	@Test
	public void testKillMiddle() {
		manager.kill("lISa");
		manager.printKillRing();
		manager.printGraveyard();
		String expected = "  bob is stalking tom\n  tom is stalking bob\n  lisa was killed by bob\n";
		assertEquals(expected, outContent.toString());
	}

	@Test
	public void testKillBack() {
		manager.kill("TOM");
		manager.printKillRing();
		manager.printGraveyard();
		String expected = "  bob is stalking lisa\n  lisa is stalking bob\n  tom was killed by lisa\n";
		assertEquals(expected, outContent.toString());
	}

	@Test
	public void testKillGraveyardPrintOrder() {
		manager.kill("TOM");
		manager.kill("lisa");
		manager.printKillRing();
		manager.printGraveyard();
		String expected = "  bob is stalking bob\n  lisa was killed by bob\n  tom was killed by lisa\n";
		assertEquals(expected, outContent.toString());
	}

	@Test(expected = IllegalStateException.class)
	public void testKillException1() {
		manager.kill("tom");
		manager.kill("bob");
		manager.kill("lisa");
	}

	@Test(expected = IllegalArgumentException.class)
	public void testKillException2() {
		manager.kill("howard");
	}

	@Test(expected = IllegalStateException.class)
	public void testKillException3() {
		manager.kill("tom");
		manager.kill("bob");
		manager.kill("howard");
	}
}