import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.Test;

import java.util.List;

public class SimpleTest {
    private static Robot robot;

    @BeforeClass
    public static void init() {
        robot = new DynamicRobot();
    }

    @Test
    public void test1() {
        boolean[][] grid = {
                {true,  false, false, false, false, true,  false, false, false},
                {false, true,  false, true,  false, false, false, false, false},
                {false, false, false, false, false, false, true,  false, false},
                {false, true,  false, false, false, true,  false, false, true},
                {false, false, true,  false, false, false, true,  false, false},
                {false, true,  false, false, true,  false, false, false, false}
        };
        check(grid, robot.collectCoins(grid), 5);
    }

    @Test
    public void test2() {
        boolean[][] grid = {
                {false, false, true,  false, false, false},
                {false, false, true,  false, true,  false},
                {false, false, false, true,  false, true},
                {true,  true,  false, false, false, true},
                {false, true,  false, false, true,  false},
                {false, false, false, true,  true,  false}
        };
        check(grid, robot.collectCoins(grid), 5);
    }

    @Test
    public void test3() {
        boolean[][] grid = {
                {true,  false, true,  false, false},
                {false, false, false, false, false},
                {false, false, true,  false, true},
                {true,  false, false, false, false},
                {false, true,  false, false, true}
        };
        check(grid, robot.collectCoins(grid), 5);
    }

    static void check(boolean[][] grid, List<Cell> coins, int maximum) {
        int prevx = -1, prevy = -1;
        for (int i = 0; i < coins.size(); i++) {
            Cell coin = coins.get(i);
            int x = coin.getX(), y = coin.getY();
            Assert.assertFalse(String.format("Cell (%d, %d) is repeated.", x, y), x == prevx && y == prevy);
            Assert.assertTrue("Given path is impossible.", x >= prevx && y >= prevy);
            Assert.assertTrue(String.format("Cell (%d, %d) does not contain a coin.", x, y), grid[x][y]);
            prevx = x; prevy = y;
        }
        Assert.assertEquals("Number of coins is not maximal.", maximum, coins.size());
    }
}