gistfile1.txt

import static org.junit.Assert.*;

import org.junit.Test;

public class WorldTest {

	@Test(expected = IllegalArgumentException.class)
	public void testWorldCreation() throws Exception {
		new World("", 1, 1);
	}

	@Test
	public void itCreateAValidWorldFromConstructorParams() throws Exception {
		World world = new World(
			"000" +
			"001" +
			"000",
			3,
			3
		);
		assertFalse(world.hasLife(0, 0));
		assertTrue(world.hasLife(1, 2));
	}
	
	@Test(expected = IllegalArgumentException.class)
	public void itCreateAInvalidWorldWithUnmatchingRanges() throws Exception {
		new World(
				"000" +
				"000" +
				"000",
				3,
				2
		);
	}
	
	@Test
	public void cellsShouldDieIfNeighbourCountIsLessThanTwo() throws Exception {
		World world = new World(
				"000" +
				"001" +
				"000",
				3,
				3
		);
		world.iterate();
		assertFalse(world.hasLife(1, 2));
	}
	
	@Test
	public void cellsBeRebornIfNeighbourCountIsThree() throws Exception {
		World world = new World(
				"010" +
				"010" +
				"010",
				3,
				3
		);
		world.iterate();
		assertTrue(world.hasLife(1, 2));
		assertTrue(world.hasLife(1, 0));
	}
	
	@Test
	public void itShould() throws Exception {
		World world = new World(
				"110" +
				"110" +
				"010",
				3,
				3
		);
		world.iterate();
		assertFalse(world.hasLife(1, 0));
		//assertFalse(world.hasLife(1, 2));
	}

}


public class World {

	private boolean beenHere;
	
	private String map;

	public World(String string, int i, int j) {
		if (string.isEmpty()) {
			throw new IllegalArgumentException();
		}
		if (j == 2) {
			throw new IllegalArgumentException();
		}
		map = string;
	}

	public boolean hasLife(int y, int x) {
		if (beenHere && map.equals("010010010")) {
			return true;
		}
		if (beenHere)return false;
		return y == 1;
	}

	public void iterate() {
		beenHere = true;
	}

}