code: import static org.junit.Assert.assertEquals;
  
  import java.awt.Color;
  import org.junit.Test;
  
  public class BasicBitmapStorageTest {
  
      @Test
      public void testHappy() {
          int width = 640;
          int height = 480;
  
          BasicBitmapStorage bbs = new BasicBitmapStorage(width, height);
          bbs.fill(Color.CYAN);
          bbs.setPixel(width / 2, height / 2, Color.BLACK);
          Color c1 = bbs.getPixel(width / 2, height / 2);
          Color c2 = bbs.getPixel(20, 20);
  
          assertEquals(Color.BLACK, c1);
          assertEquals(Color.CYAN, c2);
      }
  }
  