sclass Test_ImageInfiller {
  BufferedImage lastImageIn, lastImageOut;
  
  run {
    int blue = 0xFF0000FF;
    assertPixels(infill(imageFromPixels(3,
      blue, blue, blue,
      blue, 0, blue,
      blue, blue, blue)),
      repIntArray(blue, 9));
  }
  
  BufferedImage infill(BufferedImage image) {
    ret lastImageOut = new ImageInfiller(lastImageIn = image)!;
  }
}