/* ====================================================================
   Licensed to the Apache Software Foundation (ASF) under one or more
   contributor license agreements.  See the NOTICE file distributed with
   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You 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 org.apache.poi.hdgf;

import java.io.ByteArrayInputStream;

import junit.framework.TestCase;

public final class TestHDGFLZW extends TestCase {
	public static final byte[] testTrailerComp = new byte[] {
		123,      // *mask bit*
		-60, 2,
		-21, -16, // 3 @ 4093
		1, 0, 0, -72,
		-13, -16, // 3 @ 5
		78,       // *mask bit*
		-32, -5,  // 14 @ 4082
		1, 0, 3,
		-21, -16, // 3 @ 4093
		10, 5,    // 8 @ 28
		4,
		-21, -16, // 3 @ 4093
		21,       // *mask bit*
		9,
		-21, -16, // 3 @ 4093
		103, -21, -16, 34,
		-36, -1,  // 18 @ 4078
		52, 15,   // 18 @ 70
		70, 15,   // 18 @ 88
		120,      // *mask bit*
		88, 15,   // 18 @ 106
		-7, -2,   // 17 @ 11
		-28, -9,  // 10 @ 4086
		-123, 21, 0, 44,
		-122, 1,  // 4 @ 152
		-4,       // *mask bit*
		104, 15,  // 18 @ 122
		-24, -13, 40, -98, 32,
		78, 102, -67, -1, -2, -30, 64, 40, -67, -113, -73, 116, -98,
		-85, 2, 66, 123, 9, 109, -85, 2, -89, 14, -56, -69, -83, -79,
		-34, -3, 120, 110, 75, -9, -10, 20, -6, -25, -12, 22, -21, -16,
		-12, -81, 67, 1, -128, -70, -21, -16, 84, -21, -16, 70, 0, 23,
		-21, -16, 76, 47, -40, 79, 1, -44, -21, -16, 32, 3, 18, 12, 17,
		-43, -68, 17, 16, -8, 21, 22, -1, -21, -16, -84, -1, -35, 79,
		-9, -10, 96, 0, 46, -21, -16, 44, -39, -41, 79, 1, 119, -13,
		-16, -106, -13, -16, 84, 0, 125, 26, -21, -16, 68, -38, 79, 1,
		17, 10, 0, -97, 50, 10, 0, 0, -42, -108, 15, 118, 31, 0, -3, 29,
		-21, -16, -100, -25, 79, 1, -18, 97, -36, 76, 16, -21, -16, 86,
		0, 36, -5, 1, -5, 79, 63, 1, -124, 98, 0, 0, 28, 3, 20, -34, -3,
		125, 33, -21, -16, 100, -4, 79, 1, -92, -91, 16, -22, 24, 19, 41,
		-21, -16, -44, -59, 16, 108, 100, 0, -21, 0, 71, -105, 18, 39, 85,
		17, -3, 79, 1, 95, -108, 113, 0, 0, 104, 3, 18, 49, 49, 17, -1, 64,
		85, 1, 0, 114, 0, 0, -93, -36, -21, -16, 100, 31, 0, 0, -40, -21,
		-16, -92, 66, 127, 85, 1, 98, 119, 0, 0, -48, 79, 18, -3, 50, -17,
		1, 67, 85, 1, 81, -127, 0, -41, 0, 14, 6, 4, 17, 63, -63, 17, 68,
		85, -65, 1, 30, -120, 0, 0, 42, 79, 18, 68, 126, -21, -16, -76, 69,
		85, 1, 102, -119, 72, 37, 0, 97, 33 };
	public static final byte[] testTrailerDecomp = new byte[] {
		-60, 2, 0, 0, 0, 1, 0, 0, -72, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		0, 0, 0, 0, 0, 1, 0, 3, 0, 0, 0, 3, 0, 0, 0, 3, 0, 0, 0, 4, 0, 0,
		0, 9, 0, 0, 0, 103, 0, 0, 0, 34, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		-123, 21, 0, 44, -123, 21, 0, 44, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 40, -98, 32, 78, 102, -67,
		-2, -30, 64, 40, -67, -113, -73, 116, -67, -2, -30, 64, 40, 66,
		123, 9, 109, -67, -2, -30, 64, 40, -98, 32, 78, 102, -67, -2, -30,
		64, 40, -67, -113, -73, 116, -67, -2, -30, 64, -56, -83, -79, 0, 0,
		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 120, 110, 75, 1, 0, 0, 0,
		0, 0, 0, 0, 0, 20, 0, 0, 0, 0, 0, 0, 0, 22, 0, 0, 0, -12, -81, 67,
		1, -128, 0, 0, 0, 84, 0, 0, 0, 70, 0, 23, 0, 0, 0, 76, -40, 79, 1,
		-44, 0, 0, 0, 32, 0, 0, 0, 84, 0, 23, 0, 0, 0, -68, -40, 79, 1, -8,
		0, 0, 0, 32, 0, 0, 0, 84, 0, -1, 0, 0, 0, -84, -1, 79, 1, 0, 0, 0,
		0, 0, 0, 0, 0, 96, 0, 46, 0, 0, 0, 44, -39, 79, 1, 119, 1, 0, 0,
		-106, 1, 0, 0, 84, 0, 26, 0, 0, 0, 68, -38, 79, 1, 17, 3, 0, 0,
		50, 10, 0, 0, -42, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		29, 0, 0, 0, -100, -25, 79, 1, -18, 97, 0, 0, -106, 0, 0, 0, 86, 0,
		36, 0, 0, 0, -12, -5, 79, 1, -124, 98, 0, 0, 28, 0, 0, 0, 84, 0, 0,
		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 33, 0, 0, 0, 100,
		-4, 79, 1, -92, 98, 0, 0, 32, 0, 0, 0, 84, 0, 41, 0, 0, 0, -44, -4,
		79, 1, 108, 100, 0, 0, 71, 0, 0, 0, 86, 0, 39, 0, 0, 0, 68, -3, 79,
		1, -108, 113, 0, 0, 104, 0, 0, 0, 84, 0, 49, 0, 0, 0, -84, 64, 85,
		1, 0, 114, 0, 0, -93, 0, 0, 0, -42, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		0, 0, 0, 0, 0, 0, 0, 0, 0, -40, 0, 0, 0, -92, 66, 85, 1, 98, 119,
		0, 0, -48, 1, 0, 0, 84, 0, 50, 0, 0, 0, 20, 67, 85, 1, 81, -127,
		0, 0, 14, 6, 0, 0, 84, 0, 63, 0, 0, 0, 100, 68, 85, 1, 30, -120,
		0, 0, 42, 1, 0, 0, 84, 0, 68, 0, 0, 0, -76, 69, 85, 1, 102, -119,
		0, 0, 42, 1, 0, 0, 84, 0, 0, 0, 0, 0
	};

	public void testFromToInt() throws Exception {
		byte b255 = -1;
		assertEquals(255, HDGFLZW.fromByte(b255));
		assertEquals(-1, HDGFLZW.fromInt( HDGFLZW.fromByte(b255) ));
		assertEquals(-1, HDGFLZW.fromInt( 255 ));

		byte b11 = 11;
		assertEquals(11, HDGFLZW.fromByte(b11));
		assertEquals(11, HDGFLZW.fromInt( HDGFLZW.fromByte(b11) ));
		assertEquals(11, HDGFLZW.fromInt( 11 ));

		byte b0 = 0;
		assertEquals(0, HDGFLZW.fromByte(b0));
		assertEquals(0, HDGFLZW.fromInt( HDGFLZW.fromByte(b0) ));
		assertEquals(0, HDGFLZW.fromInt( 0 ));

		byte b127 = 127;
		assertEquals(127, HDGFLZW.fromByte(b127));
		assertEquals(127, HDGFLZW.fromInt( HDGFLZW.fromByte(b127) ));
		assertEquals(127, HDGFLZW.fromInt( 127 ));

		byte b128 = -128;
		assertEquals(128, HDGFLZW.fromByte(b128));
		assertEquals(-128, HDGFLZW.fromInt( HDGFLZW.fromByte(b128) ));
		assertEquals(-128, HDGFLZW.fromInt( 128 ));
	}

	public void testCounts() throws Exception {
		assertEquals(339, testTrailerComp.length);
		assertEquals(632, testTrailerDecomp.length);

		// Decode it using our engine
		HDGFLZW lzw = new HDGFLZW();
		byte[] dec = lzw.decode(new ByteArrayInputStream(testTrailerComp));

		// Check it's of the right size
		assertEquals(632, dec.length);

/*
		// Encode it again using our engine
		byte[] comp = lzw.compress(new ByteArrayInputStream(testTrailerDecomp));

		// Check it's of the right size
		assertEquals(339, comp.length);
*/
	}

	public void testDecompress() throws Exception {
		assertEquals(339, testTrailerComp.length);
		assertEquals(632, testTrailerDecomp.length);

		// Decode it using our engine
		HDGFLZW lzw = new HDGFLZW();
		byte[] dec = lzw.decode(new ByteArrayInputStream(testTrailerComp));

		// Now check it's the right data
		assertEquals(632, dec.length);
		for(int i=0; i<dec.length; i++) {
			if(dec[i] != testTrailerDecomp[i])
				System.err.println(i + "\t" + dec[i] + "\t" + testTrailerDecomp[i]);
		}
	}

	public void DISABLEDtestCompress() throws Exception {
		assertEquals(339, testTrailerComp.length);
		assertEquals(632, testTrailerDecomp.length);

		// Compress it using our engine
		HDGFLZW lzw = new HDGFLZW();
		byte[] comp = lzw.compress(new ByteArrayInputStream(testTrailerDecomp));

		// Now check it's the right data
		assertEquals(339, comp.length);
		for(int i=0; i<comp.length; i++) {
			if(comp[i] != testTrailerComp[i])
				System.err.println(i + "\t" + comp[i] + "\t" + testTrailerComp[i]);
		}
	}
}