GameTest.java

package trivia;

import org.junit.Test;
import victor.training.trivia.Game;
import victor.training.trivia.GameBetter;
import victor.training.trivia.IGame;

import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.util.Random;

import static org.junit.Assert.assertEquals;


public class GameTest {


	@Test
	public void caracterizationTest() {
		for (int seed = 1; seed < 10_000; seed++) {
			String expectedOutput = extractOutput(new Random(seed), new Game());
			String actualOutput = extractOutput(new Random(seed), new GameBetter());
			assertEquals(expectedOutput, actualOutput);
		}
	}

	private String extractOutput(Random rand, IGame aGame) {
		ByteArrayOutputStream baos = new ByteArrayOutputStream();
		try (PrintStream inmemory = new PrintStream(baos)) {
			System.setOut(inmemory);

			aGame.addPlayer("Chet");
			aGame.addPlayer("Pat");
			aGame.addPlayer("Sue");
			
			boolean gameNotOver = false;
			do {
				aGame.roll(rand.nextInt(5) + 1);
				
				if (rand.nextInt(9) == 7) {
					aGame.wrongAnswer();
				} else {
					aGame.correctAnswer();
				}

				gameNotOver = !aGame.isGameOver();
				
			} while (gameNotOver);
		}
		return baos.toString();
	}
}