| /* |
| * 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 static org.junit.jupiter.api.Assertions.assertEquals; |
| import static org.junit.jupiter.api.Assertions.fail; |
| |
| import java.io.IOException; |
| |
| import org.apache.commons.io.output.ByteArrayOutputStream; |
| import org.junit.jupiter.api.Test; |
| |
| |
| /** |
| * |
| */ |
| public class HexDumpTest { |
| |
| private char toHex(final int n) { |
| final char[] hexChars = |
| { |
| '0', '1', '2', '3', '4', '5', '6', '7', |
| '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' |
| }; |
| |
| return hexChars[n % 16]; |
| } |
| |
| @Test |
| public void testDump() |
| throws IOException { |
| final 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(outputArray.length, actualOutput.length, "array size mismatch"); |
| for (int j = 0; j < outputArray.length; j++) { |
| assertEquals(outputArray[j], actualOutput[j], "array[ " + j + "] mismatch"); |
| } |
| |
| // 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(outputArray.length, actualOutput.length, "array size mismatch"); |
| for (int j = 0; j < outputArray.length; j++) { |
| assertEquals(outputArray[j], actualOutput[j], "array[ " + j + "] mismatch"); |
| } |
| |
| // 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(outputArray.length, actualOutput.length, "array size mismatch"); |
| for (int j = 0; j < outputArray.length; j++) { |
| assertEquals(outputArray[j], actualOutput[j], "array[ " + j + "] mismatch"); |
| } |
| |
| // 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++) { |
| final 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++) { |
| final 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(outputArray.length, actualOutput.length, "array size mismatch"); |
| for (int j = 0; j < outputArray.length; j++) { |
| assertEquals(outputArray[j], actualOutput[j], "array[ " + j + "] mismatch"); |
| } |
| |
| // verify proper behavior with negative index |
| try { |
| HexDump.dump(testArray, 0x10000000, new ByteArrayOutputStream(), |
| -1); |
| fail("should have caught ArrayIndexOutOfBoundsException on negative index"); |
| } catch (final 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 (final 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 (final IllegalArgumentException ignored_exception) { |
| |
| // as expected |
| } |
| } |
| |
| private char toAscii(final int c) { |
| char rval = '.'; |
| |
| if ((c >= 32) && (c <= 126)) { |
| rval = (char) c; |
| } |
| return rval; |
| } |
| } |