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Commons IO example source code file (HexDumpTest.java)
The Commons IO HexDumpTest.java source code/* * 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.commons.io; import java.io.IOException; import junit.framework.TestCase; import org.apache.commons.io.output.ByteArrayOutputStream; /** * @author Scott Sanders (sanders at apache dot org) * @author Marc Johnson (mjohnson at apache dot org) * @version $Revision: 919474 $ $Date: 2010-03-05 16:31:43 +0000 (Fri, 05 Mar 2010) $ */ public class HexDumpTest extends TestCase { /** * Creates new HexDumpTest * * @param name */ public HexDumpTest(String name) { super(name); } private char toHex(int n) { char[] hexChars = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' }; return hexChars[n % 16]; } /** * test dump method * * @exception IOException */ public void testDump() throws IOException { byte[] testArray = new byte[256]; for (int j = 0; j < 256; j++) { testArray[j] = (byte) j; } ByteArrayOutputStream stream = new ByteArrayOutputStream(); HexDump.dump(testArray, 0, stream, 0); byte[] outputArray = new byte[16 * (73 + HexDump.EOL.length())]; for (int j = 0; j < 16; j++) { int offset = (73 + HexDump.EOL.length()) * j; outputArray[offset++] = (byte) '0'; outputArray[offset++] = (byte) '0'; outputArray[offset++] = (byte) '0'; outputArray[offset++] = (byte) '0'; outputArray[offset++] = (byte) '0'; outputArray[offset++] = (byte) '0'; outputArray[offset++] = (byte) toHex(j); outputArray[offset++] = (byte) '0'; outputArray[offset++] = (byte) ' '; for (int k = 0; k < 16; k++) { outputArray[offset++] = (byte) toHex(j); outputArray[offset++] = (byte) toHex(k); outputArray[offset++] = (byte) ' '; } for (int k = 0; k < 16; k++) { outputArray[offset++] = (byte) toAscii((j * 16) + k); } System.arraycopy(HexDump.EOL.getBytes(), 0, outputArray, offset, HexDump.EOL.getBytes().length); } byte[] actualOutput = stream.toByteArray(); assertEquals("array size mismatch", outputArray.length, actualOutput.length); for (int j = 0; j < outputArray.length; j++) { assertEquals("array[ " + j + "] mismatch", outputArray[j], actualOutput[j]); } // verify proper behavior with non-zero offset stream = new ByteArrayOutputStream(); HexDump.dump(testArray, 0x10000000, stream, 0); outputArray = new byte[16 * (73 + HexDump.EOL.length())]; for (int j = 0; j < 16; j++) { int offset = (73 + HexDump.EOL.length()) * j; outputArray[offset++] = (byte) '1'; outputArray[offset++] = (byte) '0'; outputArray[offset++] = (byte) '0'; outputArray[offset++] = (byte) '0'; outputArray[offset++] = (byte) '0'; outputArray[offset++] = (byte) '0'; outputArray[offset++] = (byte) toHex(j); outputArray[offset++] = (byte) '0'; outputArray[offset++] = (byte) ' '; for (int k = 0; k < 16; k++) { outputArray[offset++] = (byte) toHex(j); outputArray[offset++] = (byte) toHex(k); outputArray[offset++] = (byte) ' '; } for (int k = 0; k < 16; k++) { outputArray[offset++] = (byte) toAscii((j * 16) + k); } System.arraycopy(HexDump.EOL.getBytes(), 0, outputArray, offset, HexDump.EOL.getBytes().length); } actualOutput = stream.toByteArray(); assertEquals("array size mismatch", outputArray.length, actualOutput.length); for (int j = 0; j < outputArray.length; j++) { assertEquals("array[ " + j + "] mismatch", outputArray[j], actualOutput[j]); } // verify proper behavior with negative offset stream = new ByteArrayOutputStream(); HexDump.dump(testArray, 0xFF000000, stream, 0); outputArray = new byte[16 * (73 + HexDump.EOL.length())]; for (int j = 0; j < 16; j++) { int offset = (73 + HexDump.EOL.length()) * j; outputArray[offset++] = (byte) 'F'; outputArray[offset++] = (byte) 'F'; outputArray[offset++] = (byte) '0'; outputArray[offset++] = (byte) '0'; outputArray[offset++] = (byte) '0'; outputArray[offset++] = (byte) '0'; outputArray[offset++] = (byte) toHex(j); outputArray[offset++] = (byte) '0'; outputArray[offset++] = (byte) ' '; for (int k = 0; k < 16; k++) { outputArray[offset++] = (byte) toHex(j); outputArray[offset++] = (byte) toHex(k); outputArray[offset++] = (byte) ' '; } for (int k = 0; k < 16; k++) { outputArray[offset++] = (byte) toAscii((j * 16) + k); } System.arraycopy(HexDump.EOL.getBytes(), 0, outputArray, offset, HexDump.EOL.getBytes().length); } actualOutput = stream.toByteArray(); assertEquals("array size mismatch", outputArray.length, actualOutput.length); for (int j = 0; j < outputArray.length; j++) { assertEquals("array[ " + j + "] mismatch", outputArray[j], actualOutput[j]); } // verify proper behavior with non-zero index stream = new ByteArrayOutputStream(); HexDump.dump(testArray, 0x10000000, stream, 0x81); outputArray = new byte[(8 * (73 + HexDump.EOL.length())) - 1]; for (int j = 0; j < 8; j++) { int offset = (73 + HexDump.EOL.length()) * j; outputArray[offset++] = (byte) '1'; outputArray[offset++] = (byte) '0'; outputArray[offset++] = (byte) '0'; outputArray[offset++] = (byte) '0'; outputArray[offset++] = (byte) '0'; outputArray[offset++] = (byte) '0'; outputArray[offset++] = (byte) toHex(j + 8); outputArray[offset++] = (byte) '1'; outputArray[offset++] = (byte) ' '; for (int k = 0; k < 16; k++) { int index = 0x81 + (j * 16) + k; if (index < 0x100) { outputArray[offset++] = (byte) toHex(index / 16); outputArray[offset++] = (byte) toHex(index); } else { outputArray[offset++] = (byte) ' '; outputArray[offset++] = (byte) ' '; } outputArray[offset++] = (byte) ' '; } for (int k = 0; k < 16; k++) { int index = 0x81 + (j * 16) + k; if (index < 0x100) { outputArray[offset++] = (byte) toAscii(index); } } System.arraycopy(HexDump.EOL.getBytes(), 0, outputArray, offset, HexDump.EOL.getBytes().length); } actualOutput = stream.toByteArray(); assertEquals("array size mismatch", outputArray.length, actualOutput.length); for (int j = 0; j < outputArray.length; j++) { assertEquals("array[ " + j + "] mismatch", outputArray[j], actualOutput[j]); } // verify proper behavior with negative index try { HexDump.dump(testArray, 0x10000000, new ByteArrayOutputStream(), -1); fail("should have caught ArrayIndexOutOfBoundsException on negative index"); } catch (ArrayIndexOutOfBoundsException ignored_exception) { // as expected } // verify proper behavior with index that is too large try { HexDump.dump(testArray, 0x10000000, new ByteArrayOutputStream(), testArray.length); fail("should have caught ArrayIndexOutOfBoundsException on large index"); } catch (ArrayIndexOutOfBoundsException ignored_exception) { // as expected } // verify proper behavior with null stream try { HexDump.dump(testArray, 0x10000000, null, 0); fail("should have caught IllegalArgumentException on negative index"); } catch (IllegalArgumentException ignored_exception) { // as expected } } private char toAscii(int c) { char rval = '.'; if ((c >= 32) && (c <= 126)) { rval = (char) c; } return rval; } } Other Commons IO examples (source code examples)Here is a short list of links related to this Commons IO HexDumpTest.java source code file: |
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