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@@ -0,0 +1,109 @@ |
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/* |
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* Copyright (C) 2009, Johannes E. Schindelin |
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* Copyright (C) 2009, Johannes Schindelin <johannes.schindelin@gmx.de> |
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* and other copyright owners as documented in the project's IP log. |
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* |
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* This program and the accompanying materials are made available |
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* under the terms of the Eclipse Distribution License v1.0 which |
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* accompanies this distribution, is reproduced below, and is |
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* available at http://www.eclipse.org/org/documents/edl-v10.php |
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* |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or |
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* without modification, are permitted provided that the following |
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* conditions are met: |
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* |
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* - Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* - Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer in the documentation and/or other materials provided |
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* with the distribution. |
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* |
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* - Neither the name of the Eclipse Foundation, Inc. nor the |
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* names of its contributors may be used to endorse or promote |
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* products derived from this software without specific prior |
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* written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND |
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, |
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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package org.eclipse.jgit.diff; |
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import junit.framework.TestCase; |
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public class MyersDiffTest extends TestCase { |
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public void testAtEnd() { |
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assertDiff("HELLO", "HELL", " -4,1 +4,0"); |
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} |
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public void testAtStart() { |
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assertDiff("Git", "JGit", " -0,0 +0,1"); |
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} |
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public void testSimple() { |
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assertDiff("HELLO WORLD", "LOW", |
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" -0,3 +0,0 -5,1 +2,0 -7,4 +3,0"); |
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// is ambiguous, could be this, too: |
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// " -0,2 +0,0 -3,1 +1,0 -5,1 +2,0 -7,4 +3,0" |
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} |
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public void assertDiff(String a, String b, String edits) { |
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MyersDiff diff = new MyersDiff(toCharArray(a), toCharArray(b)); |
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assertEquals(edits, toString(diff.getEdits())); |
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} |
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private static String toString(EditList list) { |
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StringBuilder builder = new StringBuilder(); |
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for (Edit e : list) |
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builder.append(" -" + e.beginA |
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+ "," + (e.endA - e.beginA) |
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+ " +" + e.beginB + "," + (e.endB - e.beginB)); |
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return builder.toString(); |
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} |
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private static CharArray toCharArray(String s) { |
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return new CharArray(s); |
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} |
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protected static String toString(Sequence seq, int begin, int end) { |
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CharArray a = (CharArray)seq; |
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return new String(a.array, begin, end - begin); |
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} |
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protected static String toString(CharArray a, CharArray b, |
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int x, int k) { |
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return "(" + x + "," + (k + x) |
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+ (x < 0 ? '<' : |
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(x >= a.array.length ? |
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'>' : a.array[x])) |
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+ (k + x < 0 ? '<' : |
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(k + x >= b.array.length ? |
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'>' : b.array[k + x])) |
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+ ")"; |
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} |
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private static class CharArray implements Sequence { |
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char[] array; |
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public CharArray(String s) { array = s.toCharArray(); } |
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public int size() { return array.length; } |
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public boolean equals(int i, Sequence other, int j) { |
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CharArray o = (CharArray)other; |
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return array[i] == o.array[j]; |
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} |
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} |
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} |