/* * Test harness for diff_match_patch.java * * Copyright 2006 Google Inc. * http://code.google.com/p/google-diff-match-patch/ * * Licensed 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 name.fraser.neil.plaintext; import junit.framework.TestCase; import java.util.ArrayList; import java.util.Arrays; import java.util.HashMap; import java.util.HashSet; import java.util.LinkedList; import java.util.List; import java.util.Map; import java.util.Set; import name.fraser.neil.plaintext.diff_match_patch.Diff; import name.fraser.neil.plaintext.diff_match_patch.LinesToCharsResult; import name.fraser.neil.plaintext.diff_match_patch.Patch; public class diff_match_patch_test extends TestCase { private diff_match_patch dmp; private diff_match_patch.Operation DELETE = diff_match_patch.Operation.DELETE; private diff_match_patch.Operation EQUAL = diff_match_patch.Operation.EQUAL; private diff_match_patch.Operation INSERT = diff_match_patch.Operation.INSERT; protected void setUp() { // Create an instance of the diff_match_patch object. dmp = new diff_match_patch(); } // DIFF TEST FUNCTIONS public void testDiffCommonPrefix() { // Detect and remove any common prefix. assertEquals("diff_commonPrefix: Null case.", 0, dmp.diff_commonPrefix("abc", "xyz")); assertEquals("diff_commonPrefix: Non-null case.", 4, dmp.diff_commonPrefix("1234abcdef", "1234xyz")); assertEquals("diff_commonPrefix: Whole case.", 4, dmp.diff_commonPrefix("1234", "1234xyz")); } public void testDiffCommonSuffix() { // Detect and remove any common suffix. assertEquals("diff_commonSuffix: Null case.", 0, dmp.diff_commonSuffix("abc", "xyz")); assertEquals("diff_commonSuffix: Non-null case.", 4, dmp.diff_commonSuffix("abcdef1234", "xyz1234")); assertEquals("diff_commonSuffix: Whole case.", 4, dmp.diff_commonSuffix("1234", "xyz1234")); } public void testDiffHalfmatch() { // Detect a halfmatch. assertNull("diff_halfMatch: No match.", dmp.diff_halfMatch("1234567890", "abcdef")); assertArrayEquals("diff_halfMatch: Single Match #1.", new String[]{"12", "90", "a", "z", "345678"}, dmp.diff_halfMatch("1234567890", "a345678z")); assertArrayEquals("diff_halfMatch: Single Match #2.", new String[]{"a", "z", "12", "90", "345678"}, dmp.diff_halfMatch("a345678z", "1234567890")); assertArrayEquals("diff_halfMatch: Multiple Matches #1.", new String[]{"12123", "123121", "a", "z", "1234123451234"}, dmp.diff_halfMatch("121231234123451234123121", "a1234123451234z")); assertArrayEquals("diff_halfMatch: Multiple Matches #2.", new String[]{"", "-=-=-=-=-=", "x", "", "x-=-=-=-=-=-=-="}, dmp.diff_halfMatch("x-=-=-=-=-=-=-=-=-=-=-=-=", "xx-=-=-=-=-=-=-=")); assertArrayEquals("diff_halfMatch: Multiple Matches #3.", new String[]{"-=-=-=-=-=", "", "", "y", "-=-=-=-=-=-=-=y"}, dmp.diff_halfMatch("-=-=-=-=-=-=-=-=-=-=-=-=y", "-=-=-=-=-=-=-=yy")); } public void testDiffLinesToChars() { // Convert lines down to characters. ArrayList<String> tmpVector = new ArrayList<String>(); tmpVector.add(""); tmpVector.add("alpha\n"); tmpVector.add("beta\n"); assertLinesToCharsResultEquals("diff_linesToChars:", new LinesToCharsResult("\u0001\u0002\u0001", "\u0002\u0001\u0002", tmpVector), dmp.diff_linesToChars("alpha\nbeta\nalpha\n", "beta\nalpha\nbeta\n")); tmpVector.clear(); tmpVector.add(""); tmpVector.add("alpha\r\n"); tmpVector.add("beta\r\n"); tmpVector.add("\r\n"); assertLinesToCharsResultEquals("diff_linesToChars:", new LinesToCharsResult("", "\u0001\u0002\u0003\u0003", tmpVector), dmp.diff_linesToChars("", "alpha\r\nbeta\r\n\r\n\r\n")); tmpVector.clear(); tmpVector.add(""); tmpVector.add("a"); tmpVector.add("b"); assertLinesToCharsResultEquals("diff_linesToChars:", new LinesToCharsResult("\u0001", "\u0002", tmpVector), dmp.diff_linesToChars("a", "b")); // More than 256 to reveal any 8-bit limitations. int n = 300; tmpVector.clear(); StringBuilder lineList = new StringBuilder(); StringBuilder charList = new StringBuilder(); for (int x = 1; x < n + 1; x++) { tmpVector.add(x + "\n"); lineList.append(x + "\n"); charList.append(String.valueOf((char) x)); } assertEquals(n, tmpVector.size()); String lines = lineList.toString(); String chars = charList.toString(); assertEquals(n, chars.length()); tmpVector.add(0, ""); assertLinesToCharsResultEquals("diff_linesToChars: More than 256.", new LinesToCharsResult(chars, "", tmpVector), dmp.diff_linesToChars(lines, "")); } public void testDiffCharsToLines() { // First check that Diff equality works. assertTrue("diff_charsToLines:", new Diff(EQUAL, "a").equals(new Diff(EQUAL, "a"))); assertEquals("diff_charsToLines:", new Diff(EQUAL, "a"), new Diff(EQUAL, "a")); // Convert chars up to lines LinkedList<Diff> diffs = diffList(new Diff(EQUAL, "\u0001\u0002\u0001"), new Diff(INSERT, "\u0002\u0001\u0002")); ArrayList<String> tmpVector = new ArrayList<String>(); tmpVector.add(""); tmpVector.add("alpha\n"); tmpVector.add("beta\n"); dmp.diff_charsToLines(diffs, tmpVector); assertEquals("diff_charsToLines:", diffList(new Diff(EQUAL, "alpha\nbeta\nalpha\n"), new Diff(INSERT, "beta\nalpha\nbeta\n")), diffs); // More than 256 to reveal any 8-bit limitations. int n = 300; tmpVector.clear(); StringBuilder lineList = new StringBuilder(); StringBuilder charList = new StringBuilder(); for (int x = 1; x < n + 1; x++) { tmpVector.add(x + "\n"); lineList.append(x + "\n"); charList.append(String.valueOf((char) x)); } assertEquals(n, tmpVector.size()); String lines = lineList.toString(); String chars = charList.toString(); assertEquals(n, chars.length()); tmpVector.add(0, ""); diffs = diffList(new Diff(DELETE, chars)); dmp.diff_charsToLines(diffs, tmpVector); assertEquals("diff_charsToLines: More than 256.", diffList(new Diff(DELETE, lines)), diffs); } public void testDiffCleanupMerge() { // Cleanup a messy diff. LinkedList<Diff> diffs = diffList(); dmp.diff_cleanupMerge(diffs); assertEquals("diff_cleanupMerge: Null case.", diffList(), diffs); diffs = diffList(new Diff(EQUAL, "a"), new Diff(DELETE, "b"), new Diff(INSERT, "c")); dmp.diff_cleanupMerge(diffs); assertEquals("diff_cleanupMerge: No change case.", diffList(new Diff(EQUAL, "a"), new Diff(DELETE, "b"), new Diff(INSERT, "c")), diffs); diffs = diffList(new Diff(EQUAL, "a"), new Diff(EQUAL, "b"), new Diff(EQUAL, "c")); dmp.diff_cleanupMerge(diffs); assertEquals("diff_cleanupMerge: Merge equalities.", diffList(new Diff(EQUAL, "abc")), diffs); diffs = diffList(new Diff(DELETE, "a"), new Diff(DELETE, "b"), new Diff(DELETE, "c")); dmp.diff_cleanupMerge(diffs); assertEquals("diff_cleanupMerge: Merge deletions.", diffList(new Diff(DELETE, "abc")), diffs); diffs = diffList(new Diff(INSERT, "a"), new Diff(INSERT, "b"), new Diff(INSERT, "c")); dmp.diff_cleanupMerge(diffs); assertEquals("diff_cleanupMerge: Merge insertions.", diffList(new Diff(INSERT, "abc")), diffs); diffs = diffList(new Diff(DELETE, "a"), new Diff(INSERT, "b"), new Diff(DELETE, "c"), new Diff(INSERT, "d"), new Diff(EQUAL, "e"), new Diff(EQUAL, "f")); dmp.diff_cleanupMerge(diffs); assertEquals("diff_cleanupMerge: Merge interweave.", diffList(new Diff(DELETE, "ac"), new Diff(INSERT, "bd"), new Diff(EQUAL, "ef")), diffs); diffs = diffList(new Diff(DELETE, "a"), new Diff(INSERT, "abc"), new Diff(DELETE, "dc")); dmp.diff_cleanupMerge(diffs); assertEquals("diff_cleanupMerge: Prefix and suffix detection.", diffList(new Diff(EQUAL, "a"), new Diff(DELETE, "d"), new Diff(INSERT, "b"), new Diff(EQUAL, "c")), diffs); diffs = diffList(new Diff(EQUAL, "a"), new Diff(INSERT, "ba"), new Diff(EQUAL, "c")); dmp.diff_cleanupMerge(diffs); assertEquals("diff_cleanupMerge: Slide edit left.", diffList(new Diff(INSERT, "ab"), new Diff(EQUAL, "ac")), diffs); diffs = diffList(new Diff(EQUAL, "c"), new Diff(INSERT, "ab"), new Diff(EQUAL, "a")); dmp.diff_cleanupMerge(diffs); assertEquals("diff_cleanupMerge: Slide edit right.", diffList(new Diff(EQUAL, "ca"), new Diff(INSERT, "ba")), diffs); diffs = diffList(new Diff(EQUAL, "a"), new Diff(DELETE, "b"), new Diff(EQUAL, "c"), new Diff(DELETE, "ac"), new Diff(EQUAL, "x")); dmp.diff_cleanupMerge(diffs); assertEquals("diff_cleanupMerge: Slide edit left recursive.", diffList(new Diff(DELETE, "abc"), new Diff(EQUAL, "acx")), diffs); diffs = diffList(new Diff(EQUAL, "x"), new Diff(DELETE, "ca"), new Diff(EQUAL, "c"), new Diff(DELETE, "b"), new Diff(EQUAL, "a")); dmp.diff_cleanupMerge(diffs); assertEquals("diff_cleanupMerge: Slide edit right recursive.", diffList(new Diff(EQUAL, "xca"), new Diff(DELETE, "cba")), diffs); } public void testDiffCleanupSemanticLossless() { // Slide diffs to match logical boundaries. LinkedList<Diff> diffs = diffList(); dmp.diff_cleanupSemanticLossless(diffs); assertEquals("diff_cleanupSemanticLossless: Null case.", diffList(), diffs); diffs = diffList(new Diff(EQUAL, "AAA\r\n\r\nBBB"), new Diff(INSERT, "\r\nDDD\r\n\r\nBBB"), new Diff(EQUAL, "\r\nEEE")); dmp.diff_cleanupSemanticLossless(diffs); assertEquals("diff_cleanupSemanticLossless: Blank lines.", diffList(new Diff(EQUAL, "AAA\r\n\r\n"), new Diff(INSERT, "BBB\r\nDDD\r\n\r\n"), new Diff(EQUAL, "BBB\r\nEEE")), diffs); diffs = diffList(new Diff(EQUAL, "AAA\r\nBBB"), new Diff(INSERT, " DDD\r\nBBB"), new Diff(EQUAL, " EEE")); dmp.diff_cleanupSemanticLossless(diffs); assertEquals("diff_cleanupSemanticLossless: Line boundaries.", diffList(new Diff(EQUAL, "AAA\r\n"), new Diff(INSERT, "BBB DDD\r\n"), new Diff(EQUAL, "BBB EEE")), diffs); diffs = diffList(new Diff(EQUAL, "The c"), new Diff(INSERT, "ow and the c"), new Diff(EQUAL, "at.")); dmp.diff_cleanupSemanticLossless(diffs); assertEquals("diff_cleanupSemanticLossless: Word boundaries.", diffList(new Diff(EQUAL, "The "), new Diff(INSERT, "cow and the "), new Diff(EQUAL, "cat.")), diffs); diffs = diffList(new Diff(EQUAL, "The-c"), new Diff(INSERT, "ow-and-the-c"), new Diff(EQUAL, "at.")); dmp.diff_cleanupSemanticLossless(diffs); assertEquals("diff_cleanupSemanticLossless: Alphanumeric boundaries.", diffList(new Diff(EQUAL, "The-"), new Diff(INSERT, "cow-and-the-"), new Diff(EQUAL, "cat.")), diffs); diffs = diffList(new Diff(EQUAL, "a"), new Diff(DELETE, "a"), new Diff(EQUAL, "ax")); dmp.diff_cleanupSemanticLossless(diffs); assertEquals("diff_cleanupSemanticLossless: Hitting the start.", diffList(new Diff(DELETE, "a"), new Diff(EQUAL, "aax")), diffs); diffs = diffList(new Diff(EQUAL, "xa"), new Diff(DELETE, "a"), new Diff(EQUAL, "a")); dmp.diff_cleanupSemanticLossless(diffs); assertEquals("diff_cleanupSemanticLossless: Hitting the end.", diffList(new Diff(EQUAL, "xaa"), new Diff(DELETE, "a")), diffs); } public void testDiffCleanupSemantic() { // Cleanup semantically trivial equalities. LinkedList<Diff> diffs = diffList(); dmp.diff_cleanupSemantic(diffs); assertEquals("diff_cleanupSemantic: Null case.", diffList(), diffs); diffs = diffList(new Diff(DELETE, "a"), new Diff(INSERT, "b"), new Diff(EQUAL, "cd"), new Diff(DELETE, "e")); dmp.diff_cleanupSemantic(diffs); assertEquals("diff_cleanupSemantic: No elimination.", diffList(new Diff(DELETE, "a"), new Diff(INSERT, "b"), new Diff(EQUAL, "cd"), new Diff(DELETE, "e")), diffs); diffs = diffList(new Diff(DELETE, "a"), new Diff(EQUAL, "b"), new Diff(DELETE, "c")); dmp.diff_cleanupSemantic(diffs); assertEquals("diff_cleanupSemantic: Simple elimination.", diffList(new Diff(DELETE, "abc"), new Diff(INSERT, "b")), diffs); diffs = diffList(new Diff(DELETE, "ab"), new Diff(EQUAL, "cd"), new Diff(DELETE, "e"), new Diff(EQUAL, "f"), new Diff(INSERT, "g")); dmp.diff_cleanupSemantic(diffs); assertEquals("diff_cleanupSemantic: Backpass elimination.", diffList(new Diff(DELETE, "abcdef"), new Diff(INSERT, "cdfg")), diffs); diffs = diffList(new Diff(INSERT, "1"), new Diff(EQUAL, "A"), new Diff(DELETE, "B"), new Diff(INSERT, "2"), new Diff(EQUAL, "_"), new Diff(INSERT, "1"), new Diff(EQUAL, "A"), new Diff(DELETE, "B"), new Diff(INSERT, "2")); dmp.diff_cleanupSemantic(diffs); assertEquals("diff_cleanupSemantic: Multiple elimination.", diffList(new Diff(DELETE, "AB_AB"), new Diff(INSERT, "1A2_1A2")), diffs); diffs = diffList(new Diff(EQUAL, "The c"), new Diff(DELETE, "ow and the c"), new Diff(EQUAL, "at.")); dmp.diff_cleanupSemantic(diffs); assertEquals("diff_cleanupSemantic: Word boundaries.", diffList(new Diff(EQUAL, "The "), new Diff(DELETE, "cow and the "), new Diff(EQUAL, "cat.")), diffs); } public void testDiffCleanupEfficiency() { // Cleanup operationally trivial equalities. dmp.Diff_EditCost = 4; LinkedList<Diff> diffs = diffList(); dmp.diff_cleanupEfficiency(diffs); assertEquals("diff_cleanupEfficiency: Null case.", diffList(), diffs); diffs = diffList(new Diff(DELETE, "ab"), new Diff(INSERT, "12"), new Diff(EQUAL, "wxyz"), new Diff(DELETE, "cd"), new Diff(INSERT, "34")); dmp.diff_cleanupEfficiency(diffs); assertEquals("diff_cleanupEfficiency: No elimination.", diffList(new Diff(DELETE, "ab"), new Diff(INSERT, "12"), new Diff(EQUAL, "wxyz"), new Diff(DELETE, "cd"), new Diff(INSERT, "34")), diffs); diffs = diffList(new Diff(DELETE, "ab"), new Diff(INSERT, "12"), new Diff(EQUAL, "xyz"), new Diff(DELETE, "cd"), new Diff(INSERT, "34")); dmp.diff_cleanupEfficiency(diffs); assertEquals("diff_cleanupEfficiency: Four-edit elimination.", diffList(new Diff(DELETE, "abxyzcd"), new Diff(INSERT, "12xyz34")), diffs); diffs = diffList(new Diff(INSERT, "12"), new Diff(EQUAL, "x"), new Diff(DELETE, "cd"), new Diff(INSERT, "34")); dmp.diff_cleanupEfficiency(diffs); assertEquals("diff_cleanupEfficiency: Three-edit elimination.", diffList(new Diff(DELETE, "xcd"), new Diff(INSERT, "12x34")), diffs); diffs = diffList(new Diff(DELETE, "ab"), new Diff(INSERT, "12"), new Diff(EQUAL, "xy"), new Diff(INSERT, "34"), new Diff(EQUAL, "z"), new Diff(DELETE, "cd"), new Diff(INSERT, "56")); dmp.diff_cleanupEfficiency(diffs); assertEquals("diff_cleanupEfficiency: Backpass elimination.", diffList(new Diff(DELETE, "abxyzcd"), new Diff(INSERT, "12xy34z56")), diffs); dmp.Diff_EditCost = 5; diffs = diffList(new Diff(DELETE, "ab"), new Diff(INSERT, "12"), new Diff(EQUAL, "wxyz"), new Diff(DELETE, "cd"), new Diff(INSERT, "34")); dmp.diff_cleanupEfficiency(diffs); assertEquals("diff_cleanupEfficiency: High cost elimination.", diffList(new Diff(DELETE, "abwxyzcd"), new Diff(INSERT, "12wxyz34")), diffs); dmp.Diff_EditCost = 4; } public void testDiffPrettyHtml() { // Pretty print. LinkedList<Diff> diffs = diffList(new Diff(EQUAL, "a\n"), new Diff(DELETE, "<B>b</B>"), new Diff(INSERT, "c&d")); assertEquals("diff_prettyHtml:", "<SPAN TITLE=\"i=0\">a¶<BR></SPAN><DEL STYLE=\"background:#FFE6E6;\" TITLE=\"i=2\"><B>b</B></DEL><INS STYLE=\"background:#E6FFE6;\" TITLE=\"i=2\">c&d</INS>", dmp.diff_prettyHtml(diffs)); } public void testDiffText() { // Compute the source and destination texts. LinkedList<Diff> diffs = diffList(new Diff(EQUAL, "jump"), new Diff(DELETE, "s"), new Diff(INSERT, "ed"), new Diff(EQUAL, " over "), new Diff(DELETE, "the"), new Diff(INSERT, "a"), new Diff(EQUAL, " lazy")); assertEquals("diff_text1:", "jumps over the lazy", dmp.diff_text1(diffs)); assertEquals("diff_text2:", "jumped over a lazy", dmp.diff_text2(diffs)); } public void testDiffDelta() { // Convert a diff into delta string. LinkedList<Diff> diffs = diffList(new Diff(EQUAL, "jump"), new Diff(DELETE, "s"), new Diff(INSERT, "ed"), new Diff(EQUAL, " over "), new Diff(DELETE, "the"), new Diff(INSERT, "a"), new Diff(EQUAL, " lazy"), new Diff(INSERT, "old dog")); String text1 = dmp.diff_text1(diffs); assertEquals("diff_text1: Base text.", "jumps over the lazy", text1); String delta = dmp.diff_toDelta(diffs); assertEquals("diff_toDelta:", "=4\t-1\t+ed\t=6\t-3\t+a\t=5\t+old dog", delta); // Convert delta string into a diff. assertEquals("diff_fromDelta: Normal.", diffs, dmp.diff_fromDelta(text1, delta)); // Generates error (19 < 20). try { dmp.diff_fromDelta(text1 + "x", delta); fail("diff_fromDelta: Too long."); } catch (IllegalArgumentException ex) { // Exception expected. } // Generates error (19 > 18). try { dmp.diff_fromDelta(text1.substring(1), delta); fail("diff_fromDelta: Too short."); } catch (IllegalArgumentException ex) { // Exception expected. } // Generates error (%c3%xy invalid Unicode). try { dmp.diff_fromDelta("", "+%c3%xy"); fail("diff_fromDelta: Invalid character."); } catch (IllegalArgumentException ex) { // Exception expected. } // Test deltas with special characters. diffs = diffList(new Diff(EQUAL, "\u0680 \000 \t %"), new Diff(DELETE, "\u0681 \001 \n ^"), new Diff(INSERT, "\u0682 \002 \\ |")); text1 = dmp.diff_text1(diffs); assertEquals("diff_text1: Unicode text.", "\u0680 \000 \t %\u0681 \001 \n ^", text1); delta = dmp.diff_toDelta(diffs); assertEquals("diff_toDelta: Unicode.", "=7\t-7\t+%DA%82 %02 %5C %7C", delta); assertEquals("diff_fromDelta: Unicode.", diffs, dmp.diff_fromDelta(text1, delta)); // Verify pool of unchanged characters. diffs = diffList(new Diff(INSERT, "A-Z a-z 0-9 - _ . ! ~ * ' ( ) ; / ? : @ & = + $ , # ")); String text2 = dmp.diff_text2(diffs); assertEquals("diff_text2: Unchanged characters.", "A-Z a-z 0-9 - _ . ! ~ * \' ( ) ; / ? : @ & = + $ , # ", text2); delta = dmp.diff_toDelta(diffs); assertEquals("diff_toDelta: Unchanged characters.", "+A-Z a-z 0-9 - _ . ! ~ * \' ( ) ; / ? : @ & = + $ , # ", delta); // Convert delta string into a diff. assertEquals("diff_fromDelta: Unchanged characters.", diffs, dmp.diff_fromDelta("", delta)); } public void testDiffXIndex() { // Translate a location in text1 to text2. LinkedList<Diff> diffs = diffList(new Diff(DELETE, "a"), new Diff(INSERT, "1234"), new Diff(EQUAL, "xyz")); assertEquals("diff_xIndex: Translation on equality.", 5, dmp.diff_xIndex(diffs, 2)); diffs = diffList(new Diff(EQUAL, "a"), new Diff(DELETE, "1234"), new Diff(EQUAL, "xyz")); assertEquals("diff_xIndex: Translation on deletion.", 1, dmp.diff_xIndex(diffs, 3)); } public void testDiffLevenshtein() { LinkedList<Diff> diffs = diffList(new Diff(DELETE, "abc"), new Diff(INSERT, "1234"), new Diff(EQUAL, "xyz")); assertEquals("Levenshtein with trailing equality.", 4, dmp.diff_levenshtein(diffs)); diffs = diffList(new Diff(EQUAL, "xyz"), new Diff(DELETE, "abc"), new Diff(INSERT, "1234")); assertEquals("Levenshtein with leading equality.", 4, dmp.diff_levenshtein(diffs)); diffs = diffList(new Diff(DELETE, "abc"), new Diff(EQUAL, "xyz"), new Diff(INSERT, "1234")); assertEquals("Levenshtein with middle equality.", 7, dmp.diff_levenshtein(diffs)); } public void testDiffPath() { // First, check footprints are different. assertTrue("diff_footprint:", dmp.diff_footprint(1, 10) != dmp.diff_footprint(10, 1)); // Single letters. // Trace a path from back to front. List<Set<Long>> v_map; Set<Long> row_set; v_map = new ArrayList<Set<Long>>(); { row_set = new HashSet<Long>(); row_set.add(dmp.diff_footprint(0, 0)); v_map.add(row_set); row_set = new HashSet<Long>(); row_set.add(dmp.diff_footprint(0, 1)); row_set.add(dmp.diff_footprint(1, 0)); v_map.add(row_set); row_set = new HashSet<Long>(); row_set.add(dmp.diff_footprint(0, 2)); row_set.add(dmp.diff_footprint(2, 0)); row_set.add(dmp.diff_footprint(2, 2)); v_map.add(row_set); row_set = new HashSet<Long>(); row_set.add(dmp.diff_footprint(0, 3)); row_set.add(dmp.diff_footprint(2, 3)); row_set.add(dmp.diff_footprint(3, 0)); row_set.add(dmp.diff_footprint(4, 3)); v_map.add(row_set); row_set = new HashSet<Long>(); row_set.add(dmp.diff_footprint(0, 4)); row_set.add(dmp.diff_footprint(2, 4)); row_set.add(dmp.diff_footprint(4, 0)); row_set.add(dmp.diff_footprint(4, 4)); row_set.add(dmp.diff_footprint(5, 3)); v_map.add(row_set); row_set = new HashSet<Long>(); row_set.add(dmp.diff_footprint(0, 5)); row_set.add(dmp.diff_footprint(2, 5)); row_set.add(dmp.diff_footprint(4, 5)); row_set.add(dmp.diff_footprint(5, 0)); row_set.add(dmp.diff_footprint(6, 3)); row_set.add(dmp.diff_footprint(6, 5)); v_map.add(row_set); row_set = new HashSet<Long>(); row_set.add(dmp.diff_footprint(0, 6)); row_set.add(dmp.diff_footprint(2, 6)); row_set.add(dmp.diff_footprint(4, 6)); row_set.add(dmp.diff_footprint(6, 6)); row_set.add(dmp.diff_footprint(7, 5)); v_map.add(row_set); } LinkedList<Diff> diffs = diffList(new Diff(INSERT, "W"), new Diff(DELETE, "A"), new Diff(EQUAL, "1"), new Diff(DELETE, "B"), new Diff(EQUAL, "2"), new Diff(INSERT, "X"), new Diff(DELETE, "C"), new Diff(EQUAL, "3"), new Diff(DELETE, "D")); assertEquals("diff_path1: Single letters.", diffs, dmp.diff_path1(v_map, "A1B2C3D", "W12X3")); // Trace a path from front to back. v_map.remove(v_map.size() - 1); diffs = diffList(new Diff(EQUAL, "4"), new Diff(DELETE, "E"), new Diff(INSERT, "Y"), new Diff(EQUAL, "5"), new Diff(DELETE, "F"), new Diff(EQUAL, "6"), new Diff(DELETE, "G"), new Diff(INSERT, "Z")); assertEquals("diff_path2: Single letters.", diffs, dmp.diff_path2(v_map, "4E5F6G", "4Y56Z")); // Double letters. // Trace a path from back to front. v_map = new ArrayList<Set<Long>>(); { row_set = new HashSet<Long>(); row_set.add(dmp.diff_footprint(0, 0)); v_map.add(row_set); row_set = new HashSet<Long>(); row_set.add(dmp.diff_footprint(0, 1)); row_set.add(dmp.diff_footprint(1, 0)); v_map.add(row_set); row_set = new HashSet<Long>(); row_set.add(dmp.diff_footprint(0, 2)); row_set.add(dmp.diff_footprint(1, 1)); row_set.add(dmp.diff_footprint(2, 0)); v_map.add(row_set); row_set = new HashSet<Long>(); row_set.add(dmp.diff_footprint(0, 3)); row_set.add(dmp.diff_footprint(1, 2)); row_set.add(dmp.diff_footprint(2, 1)); row_set.add(dmp.diff_footprint(3, 0)); v_map.add(row_set); row_set = new HashSet<Long>(); row_set.add(dmp.diff_footprint(0, 4)); row_set.add(dmp.diff_footprint(1, 3)); row_set.add(dmp.diff_footprint(3, 1)); row_set.add(dmp.diff_footprint(4, 0)); row_set.add(dmp.diff_footprint(4, 4)); v_map.add(row_set); } diffs = diffList(new Diff(INSERT, "WX"), new Diff(DELETE, "AB"), new Diff(EQUAL, "12")); assertEquals("diff_path1: Double letters.", diffs, dmp.diff_path1(v_map, "AB12", "WX12")); // Trace a path from front to back. v_map = new ArrayList<Set<Long>>(); { row_set = new HashSet<Long>(); row_set.add(dmp.diff_footprint(0, 0)); v_map.add(row_set); row_set = new HashSet<Long>(); row_set.add(dmp.diff_footprint(0, 1)); row_set.add(dmp.diff_footprint(1, 0)); v_map.add(row_set); row_set = new HashSet<Long>(); row_set.add(dmp.diff_footprint(1, 1)); row_set.add(dmp.diff_footprint(2, 0)); row_set.add(dmp.diff_footprint(2, 4)); v_map.add(row_set); row_set = new HashSet<Long>(); row_set.add(dmp.diff_footprint(2, 1)); row_set.add(dmp.diff_footprint(2, 5)); row_set.add(dmp.diff_footprint(3, 0)); row_set.add(dmp.diff_footprint(3, 4)); v_map.add(row_set); row_set = new HashSet<Long>(); row_set.add(dmp.diff_footprint(2, 6)); row_set.add(dmp.diff_footprint(3, 5)); row_set.add(dmp.diff_footprint(4, 4)); v_map.add(row_set); } diffs = diffList(new Diff(DELETE, "CD"), new Diff(EQUAL, "34"), new Diff(INSERT, "YZ")); assertEquals("diff_path2: Double letters.", diffs, dmp.diff_path2(v_map, "CD34", "34YZ")); } public void testDiffMain() { // Perform a trivial diff. LinkedList<Diff> diffs = diffList(new Diff(EQUAL, "abc")); assertEquals("diff_main: Null case.", diffs, dmp.diff_main("abc", "abc", false)); diffs = diffList(new Diff(EQUAL, "ab"), new Diff(INSERT, "123"), new Diff(EQUAL, "c")); assertEquals("diff_main: Simple insertion.", diffs, dmp.diff_main("abc", "ab123c", false)); diffs = diffList(new Diff(EQUAL, "a"), new Diff(DELETE, "123"), new Diff(EQUAL, "bc")); assertEquals("diff_main: Simple deletion.", diffs, dmp.diff_main("a123bc", "abc", false)); diffs = diffList(new Diff(EQUAL, "a"), new Diff(INSERT, "123"), new Diff(EQUAL, "b"), new Diff(INSERT, "456"), new Diff(EQUAL, "c")); assertEquals("diff_main: Two insertions.", diffs, dmp.diff_main("abc", "a123b456c", false)); diffs = diffList(new Diff(EQUAL, "a"), new Diff(DELETE, "123"), new Diff(EQUAL, "b"), new Diff(DELETE, "456"), new Diff(EQUAL, "c")); assertEquals("diff_main: Two deletions.", diffs, dmp.diff_main("a123b456c", "abc", false)); // Perform a real diff. // Switch off the timeout. dmp.Diff_Timeout = 0; dmp.Diff_DualThreshold = 32; diffs = diffList(new Diff(DELETE, "a"), new Diff(INSERT, "b")); assertEquals("diff_main: Simple case #1.", diffs, dmp.diff_main("a", "b", false)); diffs = diffList(new Diff(DELETE, "Apple"), new Diff(INSERT, "Banana"), new Diff(EQUAL, "s are a"), new Diff(INSERT, "lso"), new Diff(EQUAL, " fruit.")); assertEquals("diff_main: Simple case #2.", diffs, dmp.diff_main("Apples are a fruit.", "Bananas are also fruit.", false)); diffs = diffList(new Diff(DELETE, "a"), new Diff(INSERT, "\u0680"), new Diff(EQUAL, "x"), new Diff(DELETE, "\t"), new Diff(INSERT, "\000")); assertEquals("diff_main: Simple case #3.", diffs, dmp.diff_main("ax\t", "\u0680x\000", false)); diffs = diffList(new Diff(DELETE, "1"), new Diff(EQUAL, "a"), new Diff(DELETE, "y"), new Diff(EQUAL, "b"), new Diff(DELETE, "2"), new Diff(INSERT, "xab")); assertEquals("diff_main: Overlap #1.", diffs, dmp.diff_main("1ayb2", "abxab", false)); diffs = diffList(new Diff(INSERT, "xaxcx"), new Diff(EQUAL, "abc"), new Diff(DELETE, "y")); assertEquals("diff_main: Overlap #2.", diffs, dmp.diff_main("abcy", "xaxcxabc", false)); // Sub-optimal double-ended diff. dmp.Diff_DualThreshold = 2; diffs = diffList(new Diff(INSERT, "x"), new Diff(EQUAL, "a"), new Diff(DELETE, "b"), new Diff(INSERT, "x"), new Diff(EQUAL, "c"), new Diff(DELETE, "y"), new Diff(INSERT, "xabc")); assertEquals("diff_main: Overlap #3.", diffs, dmp.diff_main("abcy", "xaxcxabc", false)); dmp.Diff_DualThreshold = 32; dmp.Diff_Timeout = 0.001f; // 1ms String a = "`Twas brillig, and the slithy toves\nDid gyre and gimble in the wabe:\nAll mimsy were the borogoves,\nAnd the mome raths outgrabe.\n"; String b = "I am the very model of a modern major general,\nI've information vegetable, animal, and mineral,\nI know the kings of England, and I quote the fights historical,\nFrom Marathon to Waterloo, in order categorical.\n"; // Increase the text lengths by 1024 times to ensure a timeout. for (int x = 0; x < 10; x++) { a = a + a; b = b + b; } assertNull("diff_main: Timeout.", dmp.diff_map(a, b)); dmp.Diff_Timeout = 0; // Test the linemode speedup. // Must be long to pass the 200 char cutoff. a = "1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n"; b = "abcdefghij\nabcdefghij\nabcdefghij\nabcdefghij\nabcdefghij\nabcdefghij\nabcdefghij\nabcdefghij\nabcdefghij\nabcdefghij\nabcdefghij\nabcdefghij\nabcdefghij\n"; assertEquals("diff_main: Simple.", dmp.diff_main(a, b, true), dmp.diff_main(a, b, false)); a = "1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n"; b = "abcdefghij\n1234567890\n1234567890\n1234567890\nabcdefghij\n1234567890\n1234567890\n1234567890\nabcdefghij\n1234567890\n1234567890\n1234567890\nabcdefghij\n"; String[] texts_linemode = diff_rebuildtexts(dmp.diff_main(a, b, true)); String[] texts_textmode = diff_rebuildtexts(dmp.diff_main(a, b, false)); assertArrayEquals("diff_main: Overlap.", texts_textmode, texts_linemode); // Test null inputs. try { dmp.diff_main(null, null); fail("diff_main: Null inputs."); } catch (IllegalArgumentException ex) { // Error expected. } } // MATCH TEST FUNCTIONS public void testMatchAlphabet() { // Initialise the bitmasks for Bitap. Map<Character, Integer> bitmask; bitmask = new HashMap<Character, Integer>(); bitmask.put('a', 4); bitmask.put('b', 2); bitmask.put('c', 1); assertEquals("match_alphabet: Unique.", bitmask, dmp.match_alphabet("abc")); bitmask = new HashMap<Character, Integer>(); bitmask.put('a', 37); bitmask.put('b', 18); bitmask.put('c', 8); assertEquals("match_alphabet: Duplicates.", bitmask, dmp.match_alphabet("abcaba")); } public void testMatchBitap() { // Bitap algorithm. dmp.Match_Distance = 100; dmp.Match_Threshold = 0.5f; assertEquals("match_bitap: Exact match #1.", 5, dmp.match_bitap("abcdefghijk", "fgh", 5)); assertEquals("match_bitap: Exact match #2.", 5, dmp.match_bitap("abcdefghijk", "fgh", 0)); assertEquals("match_bitap: Fuzzy match #1.", 4, dmp.match_bitap("abcdefghijk", "efxhi", 0)); assertEquals("match_bitap: Fuzzy match #2.", 2, dmp.match_bitap("abcdefghijk", "cdefxyhijk", 5)); assertEquals("match_bitap: Fuzzy match #3.", -1, dmp.match_bitap("abcdefghijk", "bxy", 1)); assertEquals("match_bitap: Overflow.", 2, dmp.match_bitap("123456789xx0", "3456789x0", 2)); assertEquals("match_bitap: Before start match.", 0, dmp.match_bitap("abcdef", "xxabc", 4)); assertEquals("match_bitap: Beyond end match.", 3, dmp.match_bitap("abcdef", "defyy", 4)); assertEquals("match_bitap: Oversized pattern.", 0, dmp.match_bitap("abcdef", "xabcdefy", 0)); dmp.Match_Threshold = 0.4f; assertEquals("match_bitap: Threshold #1.", 4, dmp.match_bitap("abcdefghijk", "efxyhi", 1)); dmp.Match_Threshold = 0.3f; assertEquals("match_bitap: Threshold #2.", -1, dmp.match_bitap("abcdefghijk", "efxyhi", 1)); dmp.Match_Threshold = 0.0f; assertEquals("match_bitap: Threshold #3.", 1, dmp.match_bitap("abcdefghijk", "bcdef", 1)); dmp.Match_Threshold = 0.5f; assertEquals("match_bitap: Multiple select #1.", 0, dmp.match_bitap("abcdexyzabcde", "abccde", 3)); assertEquals("match_bitap: Multiple select #2.", 8, dmp.match_bitap("abcdexyzabcde", "abccde", 5)); dmp.Match_Distance = 10; // Strict location. assertEquals("match_bitap: Distance test #1.", -1, dmp.match_bitap("abcdefghijklmnopqrstuvwxyz", "abcdefg", 24)); assertEquals("match_bitap: Distance test #2.", 0, dmp.match_bitap("abcdefghijklmnopqrstuvwxyz", "abcdxxefg", 1)); dmp.Match_Distance = 1000; // Loose location. assertEquals("match_bitap: Distance test #3.", 0, dmp.match_bitap("abcdefghijklmnopqrstuvwxyz", "abcdefg", 24)); } public void testMatchMain() { // Full match. assertEquals("match_main: Equality.", 0, dmp.match_main("abcdef", "abcdef", 1000)); assertEquals("match_main: Null text.", -1, dmp.match_main("", "abcdef", 1)); assertEquals("match_main: Null pattern.", 3, dmp.match_main("abcdef", "", 3)); assertEquals("match_main: Exact match.", 3, dmp.match_main("abcdef", "de", 3)); assertEquals("match_main: Beyond end match.", 3, dmp.match_main("abcdef", "defy", 4)); assertEquals("match_main: Oversized pattern.", 0, dmp.match_main("abcdef", "abcdefy", 0)); dmp.Match_Threshold = 0.7f; assertEquals("match_main: Complex match.", 4, dmp.match_main("I am the very model of a modern major general.", " that berry ", 5)); dmp.Match_Threshold = 0.5f; // Test null inputs. try { dmp.match_main(null, null, 0); fail("match_main: Null inputs."); } catch (IllegalArgumentException ex) { // Error expected. } } // PATCH TEST FUNCTIONS public void testPatchObj() { // Patch Object. Patch p = new Patch(); p.start1 = 20; p.start2 = 21; p.length1 = 18; p.length2 = 17; p.diffs = diffList(new Diff(EQUAL, "jump"), new Diff(DELETE, "s"), new Diff(INSERT, "ed"), new Diff(EQUAL, " over "), new Diff(DELETE, "the"), new Diff(INSERT, "a"), new Diff(EQUAL, "\nlaz")); String strp = "@@ -21,18 +22,17 @@\n jump\n-s\n+ed\n over \n-the\n+a\n %0Alaz\n"; assertEquals("Patch: toString.", strp, p.toString()); } public void testPatchFromText() { assertTrue("patch_fromText: #0.", dmp.patch_fromText("").isEmpty()); String strp = "@@ -21,18 +22,17 @@\n jump\n-s\n+ed\n over \n-the\n+a\n %0Alaz\n"; assertEquals("patch_fromText: #1.", strp, dmp.patch_fromText(strp).get(0).toString()); assertEquals("patch_fromText: #2.", "@@ -1 +1 @@\n-a\n+b\n", dmp.patch_fromText("@@ -1 +1 @@\n-a\n+b\n").get(0).toString()); assertEquals("patch_fromText: #3.", "@@ -1,3 +0,0 @@\n-abc\n", dmp.patch_fromText("@@ -1,3 +0,0 @@\n-abc\n").get(0).toString()); assertEquals("patch_fromText: #4.", "@@ -0,0 +1,3 @@\n+abc\n", dmp.patch_fromText("@@ -0,0 +1,3 @@\n+abc\n").get(0).toString()); // Generates error. try { dmp.patch_fromText("Bad\nPatch\n"); fail("patch_fromText: #5."); } catch (IllegalArgumentException ex) { // Exception expected. } } public void testPatchToText() { String strp = "@@ -21,18 +22,17 @@\n jump\n-s\n+ed\n over \n-the\n+a\n laz\n"; List<Patch> patches; patches = dmp.patch_fromText(strp); assertEquals("patch_toText: Single", strp, dmp.patch_toText(patches)); strp = "@@ -1,9 +1,9 @@\n-f\n+F\n oo+fooba\n@@ -7,9 +7,9 @@\n obar\n-,\n+.\n tes\n"; patches = dmp.patch_fromText(strp); assertEquals("patch_toText: Dual", strp, dmp.patch_toText(patches)); } public void testPatchAddContext() { dmp.Patch_Margin = 4; Patch p; p = dmp.patch_fromText("@@ -21,4 +21,10 @@\n-jump\n+somersault\n").get(0); dmp.patch_addContext(p, "The quick brown fox jumps over the lazy dog."); assertEquals("patch_addContext: Simple case.", "@@ -17,12 +17,18 @@\n fox \n-jump\n+somersault\n s ov\n", p.toString()); p = dmp.patch_fromText("@@ -21,4 +21,10 @@\n-jump\n+somersault\n").get(0); dmp.patch_addContext(p, "The quick brown fox jumps."); assertEquals("patch_addContext: Not enough trailing context.", "@@ -17,10 +17,16 @@\n fox \n-jump\n+somersault\n s.\n", p.toString()); p = dmp.patch_fromText("@@ -3 +3,2 @@\n-e\n+at\n").get(0); dmp.patch_addContext(p, "The quick brown fox jumps."); assertEquals("patch_addContext: Not enough leading context.", "@@ -1,7 +1,8 @@\n Th\n-e\n+at\n qui\n", p.toString()); p = dmp.patch_fromText("@@ -3 +3,2 @@\n-e\n+at\n").get(0); dmp.patch_addContext(p, "The quick brown fox jumps. The quick brown fox crashes."); assertEquals("patch_addContext: Ambiguity.", "@@ -1,27 +1,28 @@\n Th\n-e\n+at\n quick brown fox jumps. \n", p.toString()); } @SuppressWarnings("deprecation") public void testPatchMake() { LinkedList<Patch> patches; String text1 = "The quick brown fox jumps over the lazy dog."; String text2 = "That quick brown fox jumped over a lazy dog."; String expectedPatch = "@@ -1,8 +1,7 @@\n Th\n-at\n+e\n qui\n@@ -21,17 +21,18 @@\n jump\n-ed\n+s\n over \n-a\n+the\n laz\n"; // The second patch must be "-21,17 +21,18", not "-22,17 +21,18" due to rolling context. patches = dmp.patch_make(text2, text1); assertEquals("patch_make: Text2+Text1 inputs", expectedPatch, dmp.patch_toText(patches)); expectedPatch = "@@ -1,11 +1,12 @@\n Th\n-e\n+at\n quick b\n@@ -22,18 +22,17 @@\n jump\n-s\n+ed\n over \n-the\n+a\n laz\n"; patches = dmp.patch_make(text1, text2); assertEquals("patch_make: Text1+Text2 inputs", expectedPatch, dmp.patch_toText(patches)); LinkedList<Diff> diffs = dmp.diff_main(text1, text2, false); patches = dmp.patch_make(diffs); assertEquals("patch_make: Diff input", expectedPatch, dmp.patch_toText(patches)); patches = dmp.patch_make(text1, diffs); assertEquals("patch_make: Text1+Diff inputs", expectedPatch, dmp.patch_toText(patches)); patches = dmp.patch_make(text1, text2, diffs); assertEquals("patch_make: Text1+Text2+Diff inputs (deprecated)", expectedPatch, dmp.patch_toText(patches)); patches = dmp.patch_make("`1234567890-=[]\\;',./", "~!@#$%^&*()_+{}|:\"<>?"); assertEquals("patch_toText: Character encoding.", "@@ -1,21 +1,21 @@\n-%601234567890-=%5B%5D%5C;',./\n+~!@#$%25%5E&*()_+%7B%7D%7C:%22%3C%3E?\n", dmp.patch_toText(patches)); diffs = diffList(new Diff(DELETE, "`1234567890-=[]\\;',./"), new Diff(INSERT, "~!@#$%^&*()_+{}|:\"<>?")); assertEquals("patch_fromText: Character decoding.", diffs, dmp.patch_fromText("@@ -1,21 +1,21 @@\n-%601234567890-=%5B%5D%5C;',./\n+~!@#$%25%5E&*()_+%7B%7D%7C:%22%3C%3E?\n").get(0).diffs); text1 = ""; for (int x = 0; x < 100; x++) { text1 += "abcdef"; } text2 = text1 + "123"; expectedPatch = "@@ -573,28 +573,31 @@\n cdefabcdefabcdefabcdefabcdef\n+123\n"; patches = dmp.patch_make(text1, text2); assertEquals("patch_make: Long string with repeats.", expectedPatch, dmp.patch_toText(patches)); // Test null inputs. try { dmp.patch_make(null); fail("patch_make: Null inputs."); } catch (IllegalArgumentException ex) { // Error expected. } } public void testPatchSplitMax() { // Assumes that Match_MaxBits is 32. LinkedList<Patch> patches; patches = dmp.patch_make("abcdefghijklmnopqrstuvwxyz01234567890", "XabXcdXefXghXijXklXmnXopXqrXstXuvXwxXyzX01X23X45X67X89X0"); dmp.patch_splitMax(patches); assertEquals("patch_splitMax: #1.", "@@ -1,32 +1,46 @@\n+X\n ab\n+X\n cd\n+X\n ef\n+X\n gh\n+X\n ij\n+X\n kl\n+X\n mn\n+X\n op\n+X\n qr\n+X\n st\n+X\n uv\n+X\n wx\n+X\n yz\n+X\n 012345\n@@ -25,13 +39,18 @@\n zX01\n+X\n 23\n+X\n 45\n+X\n 67\n+X\n 89\n+X\n 0\n", dmp.patch_toText(patches)); patches = dmp.patch_make("abcdef1234567890123456789012345678901234567890123456789012345678901234567890uvwxyz", "abcdefuvwxyz"); String oldToText = dmp.patch_toText(patches); dmp.patch_splitMax(patches); assertEquals("patch_splitMax: #2.", oldToText, dmp.patch_toText(patches)); patches = dmp.patch_make("1234567890123456789012345678901234567890123456789012345678901234567890", "abc"); dmp.patch_splitMax(patches); assertEquals("patch_splitMax: #3.", "@@ -1,32 +1,4 @@\n-1234567890123456789012345678\n 9012\n@@ -29,32 +1,4 @@\n-9012345678901234567890123456\n 7890\n@@ -57,14 +1,3 @@\n-78901234567890\n+abc\n", dmp.patch_toText(patches)); patches = dmp.patch_make("abcdefghij , h : 0 , t : 1 abcdefghij , h : 0 , t : 1 abcdefghij , h : 0 , t : 1", "abcdefghij , h : 1 , t : 1 abcdefghij , h : 1 , t : 1 abcdefghij , h : 0 , t : 1"); dmp.patch_splitMax(patches); assertEquals("patch_splitMax: #4.", "@@ -2,32 +2,32 @@\n bcdefghij , h : \n-0\n+1\n , t : 1 abcdef\n@@ -29,32 +29,32 @@\n bcdefghij , h : \n-0\n+1\n , t : 1 abcdef\n", dmp.patch_toText(patches)); } public void testPatchAddPadding() { LinkedList<Patch> patches; patches = dmp.patch_make("", "test"); assertEquals("patch_addPadding: Both edges full.", "@@ -0,0 +1,4 @@\n+test\n", dmp.patch_toText(patches)); dmp.patch_addPadding(patches); assertEquals("patch_addPadding: Both edges full.", "@@ -1,8 +1,12 @@\n %01%02%03%04\n+test\n %01%02%03%04\n", dmp.patch_toText(patches)); patches = dmp.patch_make("XY", "XtestY"); assertEquals("patch_addPadding: Both edges partial.", "@@ -1,2 +1,6 @@\n X\n+test\n Y\n", dmp.patch_toText(patches)); dmp.patch_addPadding(patches); assertEquals("patch_addPadding: Both edges partial.", "@@ -2,8 +2,12 @@\n %02%03%04X\n+test\n Y%01%02%03\n", dmp.patch_toText(patches)); patches = dmp.patch_make("XXXXYYYY", "XXXXtestYYYY"); assertEquals("patch_addPadding: Both edges none.", "@@ -1,8 +1,12 @@\n XXXX\n+test\n YYYY\n", dmp.patch_toText(patches)); dmp.patch_addPadding(patches); assertEquals("patch_addPadding: Both edges none.", "@@ -5,8 +5,12 @@\n XXXX\n+test\n YYYY\n", dmp.patch_toText(patches)); } public void testPatchApply() { dmp.Match_Distance = 1000; dmp.Match_Threshold = 0.5f; dmp.Patch_DeleteThreshold = 0.5f; LinkedList<Patch> patches; patches = dmp.patch_make("The quick brown fox jumps over the lazy dog.", "That quick brown fox jumped over a lazy dog."); Object[] results = dmp.patch_apply(patches, "The quick brown fox jumps over the lazy dog."); boolean[] boolArray = (boolean[]) results[1]; String resultStr = results[0] + "\t" + boolArray[0] + "\t" + boolArray[1]; assertEquals("patch_apply: Exact match.", "That quick brown fox jumped over a lazy dog.\ttrue\ttrue", resultStr); results = dmp.patch_apply(patches, "The quick red rabbit jumps over the tired tiger."); boolArray = (boolean[]) results[1]; resultStr = results[0] + "\t" + boolArray[0] + "\t" + boolArray[1]; assertEquals("patch_apply: Partial match.", "That quick red rabbit jumped over a tired tiger.\ttrue\ttrue", resultStr); results = dmp.patch_apply(patches, "I am the very model of a modern major general."); boolArray = (boolean[]) results[1]; resultStr = results[0] + "\t" + boolArray[0] + "\t" + boolArray[1]; assertEquals("patch_apply: Failed match.", "I am the very model of a modern major general.\tfalse\tfalse", resultStr); patches = dmp.patch_make("x1234567890123456789012345678901234567890123456789012345678901234567890y", "xabcy"); results = dmp.patch_apply(patches, "x123456789012345678901234567890-----++++++++++-----123456789012345678901234567890y"); boolArray = (boolean[]) results[1]; resultStr = results[0] + "\t" + boolArray[0] + "\t" + boolArray[1]; assertEquals("patch_apply: Big delete, small change.", "xabcy\ttrue\ttrue", resultStr); patches = dmp.patch_make("x1234567890123456789012345678901234567890123456789012345678901234567890y", "xabcy"); results = dmp.patch_apply(patches, "x12345678901234567890---------------++++++++++---------------12345678901234567890y"); boolArray = (boolean[]) results[1]; resultStr = results[0] + "\t" + boolArray[0] + "\t" + boolArray[1]; assertEquals("patch_apply: Big delete, big change 1.", "xabc12345678901234567890---------------++++++++++---------------12345678901234567890y\tfalse\ttrue", resultStr); dmp.Patch_DeleteThreshold = 0.6f; patches = dmp.patch_make("x1234567890123456789012345678901234567890123456789012345678901234567890y", "xabcy"); results = dmp.patch_apply(patches, "x12345678901234567890---------------++++++++++---------------12345678901234567890y"); boolArray = (boolean[]) results[1]; resultStr = results[0] + "\t" + boolArray[0] + "\t" + boolArray[1]; assertEquals("patch_apply: Big delete, big change 2.", "xabcy\ttrue\ttrue", resultStr); dmp.Patch_DeleteThreshold = 0.5f; // Compensate for failed patch. dmp.Match_Threshold = 0.0f; dmp.Match_Distance = 0; patches = dmp.patch_make("abcdefghijklmnopqrstuvwxyz--------------------1234567890", "abcXXXXXXXXXXdefghijklmnopqrstuvwxyz--------------------1234567YYYYYYYYYY890"); results = dmp.patch_apply(patches, "ABCDEFGHIJKLMNOPQRSTUVWXYZ--------------------1234567890"); boolArray = (boolean[]) results[1]; resultStr = results[0] + "\t" + boolArray[0] + "\t" + boolArray[1]; assertEquals("ABCDEFGHIJKLMNOPQRSTUVWXYZ--------------------1234567YYYYYYYYYY890\tfalse\ttrue", resultStr); dmp.Match_Threshold = 0.5f; dmp.Match_Distance = 1000; patches = dmp.patch_make("", "test"); String patchStr = dmp.patch_toText(patches); dmp.patch_apply(patches, ""); assertEquals("patch_apply: No side effects.", patchStr, dmp.patch_toText(patches)); patches = dmp.patch_make("The quick brown fox jumps over the lazy dog.", "Woof"); patchStr = dmp.patch_toText(patches); dmp.patch_apply(patches, "The quick brown fox jumps over the lazy dog."); assertEquals("patch_apply: No side effects with major delete.", patchStr, dmp.patch_toText(patches)); patches = dmp.patch_make("", "test"); results = dmp.patch_apply(patches, ""); boolArray = (boolean[]) results[1]; resultStr = results[0] + "\t" + boolArray[0]; assertEquals("patch_apply: Edge exact match.", "test\ttrue", resultStr); patches = dmp.patch_make("XY", "XtestY"); results = dmp.patch_apply(patches, "XY"); boolArray = (boolean[]) results[1]; resultStr = results[0] + "\t" + boolArray[0]; assertEquals("patch_apply: Near edge exact match.", "XtestY\ttrue", resultStr); patches = dmp.patch_make("y", "y123"); results = dmp.patch_apply(patches, "x"); boolArray = (boolean[]) results[1]; resultStr = results[0] + "\t" + boolArray[0]; assertEquals("patch_apply: Edge partial match.", "x123\ttrue", resultStr); } private void assertArrayEquals(String error_msg, Object[] a, Object[] b) { List<Object> list_a = Arrays.asList(a); List<Object> list_b = Arrays.asList(b); assertEquals(error_msg, list_a, list_b); } private void assertLinesToCharsResultEquals(String error_msg, LinesToCharsResult a, LinesToCharsResult b) { assertEquals(error_msg, a.chars1, b.chars1); assertEquals(error_msg, a.chars2, b.chars2); assertEquals(error_msg, a.lineArray, b.lineArray); } // Construct the two texts which made up the diff originally. private static String[] diff_rebuildtexts(LinkedList<Diff> diffs) { String[] text = {"", ""}; for (Diff myDiff : diffs) { if (myDiff.operation != diff_match_patch.Operation.INSERT) { text[0] += myDiff.text; } if (myDiff.operation != diff_match_patch.Operation.DELETE) { text[1] += myDiff.text; } } return text; } // Private function for quickly building lists of diffs. private static LinkedList<Diff> diffList(Diff... diffs) { LinkedList<Diff> myDiffList = new LinkedList<Diff>(); for (Diff myDiff : diffs) { myDiffList.add(myDiff); } return myDiffList; } }