import java.awt.Color;

import junit.framework.TestCase;

/*
 * This testing framework provides basic level tests for 
 * each of the methods, however additional testing will be 
 * required, along with extensive testing of ALL helper methods
 * that you write.
 */
public class PictureTest extends TestCase {
	/*
	 * A method to test the private helper methods within
	 * Picture.java
	 */
	public void testHelpers()
	{
		assertTrue(Picture.helpersWork());
		
	}
	/*
	 * Validate that grayscale works and does not modify the 
	 * original Picture object.
	 */
	public void testGrayscale()
	{
		Picture pic 		= Picture.loadPicture("Creek.bmp");
		Picture picCopy 	= new Picture(pic);
		Picture picCorrect	= Picture.loadPicture("Creek_grayscale.bmp");
		Picture picTest		= pic.grayscale();
		assertTrue(pic.equals(picCopy));
		assertTrue(picCorrect.equals(picTest));
	}
	/*
	 * Validate that negate works and does not modify the 
	 * original Picture object.
	 */
	public void testNegate()
	{
		Picture pic 		= Picture.loadPicture("Creek.bmp");
		Picture picCopy 	= new Picture(pic);
		Picture picCorrect	= Picture.loadPicture("Creek_negate.bmp");
		Picture picTest		= pic.negate();
		assertTrue(pic.equals(picCopy));
		assertTrue(picCorrect.equals(picTest));
	}
	/*
	 * Validate that rotate(1) works and does not modify the 
	 * original Picture object.
	 */
	public void testRotate1()
	{
		Picture pic 		= Picture.loadPicture("CalOriginal.bmp");
		Picture picCopy 	= new Picture(pic);
		Picture picCorrect	= Picture.loadPicture("CalRotate1.bmp");
		Picture picTest		= pic.rotate(1);
		assertTrue(pic.equals(picCopy));
		assertTrue(picCorrect.equals(picTest));
	}

	/*
	 * Validate that rotate(2) works and does not modify the 
	 * original Picture object.
	 */
	public void testRotate2()
	{
		Picture pic 		= Picture.loadPicture("CalOriginal.bmp");
		Picture picCopy 	= new Picture(pic);
		Picture picCorrect	= Picture.loadPicture("CalRotate2.bmp");
		Picture picTest		= pic.rotate(2);
		assertTrue(pic.equals(picCopy));
		assertTrue(picCorrect.equals(picTest));
	}

	/*
	 * Validate that rotate(3) works and does not modify the 
	 * original Picture object.
	 */
	public void testRotate3()
	{
		Picture pic 		= Picture.loadPicture("CalOriginal.bmp");
		Picture picCopy 	= new Picture(pic);
		Picture picCorrect	= Picture.loadPicture("CalRotate3.bmp");
		Picture picTest		= pic.rotate(3);
		assertTrue(pic.equals(picCopy));
		assertTrue(picCorrect.equals(picTest));
	}
	/*
	 * Validate that flip(Picture.HORIZONTAL) works and does not modify the 
	 * original Picture object.
	 */
	public void testFlipHorixontal()
	{
		Picture pic 		= Picture.loadPicture("CalOriginal.bmp");
		Picture picCopy 	= new Picture(pic);
		Picture picCorrect	= Picture.loadPicture("CalHorizontal.bmp");
		Picture picTest		= pic.flip(Picture.HORIZONTAL);
		assertTrue(pic.equals(picCopy));
		assertTrue(picCorrect.equals(picTest));
	}
	/*
	 * Validate that flip(Picture.VERTICAL) works and does not modify the 
	 * original Picture object.
	 */
	public void testFlipVertical()
	{
		Picture pic 		= Picture.loadPicture("CalOriginal.bmp");
		Picture picCopy 	= new Picture(pic);
		Picture picCorrect	= Picture.loadPicture("CalVertical.bmp");
		Picture picTest		= pic.flip(Picture.VERTICAL);
		assertTrue(pic.equals(picCopy));
		assertTrue(picCorrect.equals(picTest));
	}
	/*
	 * Validate that flip(Picture.FORWARD_DIAGONAL) works and 
	 * does not modify the original Picture object.
	 */
	public void testFlipForwardDiagonal()
	{
		Picture pic 		= Picture.loadPicture("CalOriginal.bmp");
		Picture picCopy 	= new Picture(pic);
		Picture picCorrect	= Picture.loadPicture("CalForwardDiagonal.bmp");
		Picture picTest		= pic.flip(Picture.FORWARD_DIAGONAL);
		assertTrue(pic.equals(picCopy));
		assertTrue(picCorrect.equals(picTest));
	}
	/*
	 * Validate that flip(Picture.BACKWARD_DIAGONAL) works and 
	 * does not modify the original Picture object.
	 */
	public void testFlipBackwardDiagonal()
	{
		Picture pic 		= Picture.loadPicture("CalOriginal.bmp");
		Picture picCopy 	= new Picture(pic);
		Picture picCorrect	= Picture.loadPicture("CalBackwardDiagonal.bmp");
		Picture picTest		= pic.flip(Picture.BACKWARD_DIAGONAL);
		assertTrue(pic.equals(picCopy));
		assertTrue(picCorrect.equals(picTest));
	}
	/*
	 * Validate that blur works and does not modify the 
	 * original Picture object.
	 */
	public void testBlur()
	{
		Picture pic 		= Picture.loadPicture("Creek.bmp");
		Picture picCopy 	= new Picture(pic);
		Picture picCorrect	= Picture.loadPicture("Creek_blur.bmp");
		Picture picTest		= pic.blur(3);
		assertTrue(pic.equals(picCopy));
		assertTrue(picCorrect.equals(picTest));
	}
	/*
	 * Validate that showEdges works and does not modify the 
	 * original Picture object.
	 */
	public void testShowEdges()
	{
		Picture pic 		= Picture.loadPicture("Colleen.bmp");
		Picture picCopy 	= new Picture(pic);
		Picture picCorrect	= Picture.loadPicture("Colleen_showEdges.bmp");
		Picture picTest		= pic.showEdges(20);
		assertTrue(pic.equals(picCopy));
		assertTrue(picCorrect.equals(picTest));
	}
	/*
	 * Validate that chromaKey works and does not modify the 
	 * original Picture object.
	 */
	public void testChromaKey()
	{
		Picture pic 		= Picture.loadPicture("Colleen.bmp");
		Picture bg 			= Picture.loadPicture("Creek.bmp");
		Picture picCopy 	= new Picture(pic);
		Picture picCorrect	= Picture.loadPicture("Colleen_chromaKey.bmp");
		Picture picTest		= pic.chromaKey(118, 54, bg, 30);
		assertTrue(pic.equals(picCopy));
		assertTrue(picCorrect.equals(picTest));
	}
	/*
	 * Validate that paintBucket works and does not modify the 
	 * original Picture object.
	 */
	public void testPaintBucket()
	{
		Picture pic 		= Picture.loadPicture("Colleen.bmp");
		Picture picCopy 	= new Picture(pic);
		Picture picCorrect	= Picture.loadPicture("Colleen_paintBucket.bmp");
		Picture picTest		= pic.paintBucket(118, 54, 30, new Color(0, 255, 0));
		assertTrue(pic.equals(picCopy));
		assertTrue(picCorrect.equals(picTest));
	}
	/*
	 * Validate that convertToAscii works and does not modify the 
	 * original Picture object.
	 */
	public void testConvertToAscii()
	{
		Picture pic         = Picture.loadPicture("mickey.bmp");
		Picture picCopy     = new Picture(pic);
		Picture picCorrect  = Picture.loadPicture("mickey_ascii.bmp");
		Picture picTest     = pic.convertToAscii();
		assertTrue(pic.equals(picCopy));
		assertTrue(picCorrect.equals(picTest));
	}
	/*
	 * Validate that showEdges works and does not modify the 
	 * original Picture object (and this picture is cute)
	 */
	public void testShowEdgesMickey()
	{
		Picture pic         = Picture.loadPicture("mickey.bmp");
		Picture picCopy     = new Picture(pic);
		Picture picCorrect  = Picture.loadPicture("mickey_showEdges.bmp");
		Picture picTest     = pic.showEdges(20);
		assertTrue(pic.equals(picCopy));
		assertTrue(picCorrect.equals(picTest));
	}
	/**
	 * Helper method for loading a picture in the current directory.
	 */
}