/*
 * Copyright (C) 2014 Pedro Vicente Gómez Sánchez.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.github.pedrovgs.problem42;

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

import static org.junit.Assert.assertArrayEquals;

/**
 * @author Pedro Vicente Gómez Sánchez.
 */
public class FloodFillTest {

  private FloodFill floodFill;

  @Before public void setUp() {
    floodFill = new FloodFill();
  }

  @Test(expected = IllegalArgumentException.class) public void shouldNotAcceptNullInstances() {
    floodFill.apply(null, 0, 1, 0, 0);
  }

  @Test public void shouldPaintSelectedZoneUsingIndicatedColor() {
    int[][] picture = {
        { 1, 1, 1, 1 }, { 1, 0, 0, 1 }, { 1, 0, 0, 1 }, { 1, 1, 1, 1 }
    };
    int colorToReplace = 0;
    int colorToPaint = 1;
    int x = 1;
    int y = 1;

    floodFill.apply(picture, colorToReplace, colorToPaint, x, y);

    int[][] expectedResult = {
        { 1, 1, 1, 1 }, { 1, 1, 1, 1 }, { 1, 1, 1, 1 }, { 1, 1, 1, 1 }
    };
    assertArrayEquals(expectedResult, picture);
  }

  @Test public void shouldNotModifyIfStartPaintingInOnePixelWithTheColorToPaint() {
    int[][] picture = {
        { 1, 1, 1, 1 }, { 1, 0, 0, 1 }, { 1, 0, 0, 1 }, { 1, 1, 1, 1 }
    };
    int colorToReplace = 0;
    int colorToPaint = 1;
    int x = 0;
    int y = 0;

    floodFill.apply(picture, colorToReplace, colorToPaint, x, y);

    int[][] expectedResult = {
        { 1, 1, 1, 1 }, { 1, 0, 0, 1 }, { 1, 0, 0, 1 }, { 1, 1, 1, 1 }
    };
    assertArrayEquals(expectedResult, picture);
  }
}

Add some tests to problem 42