public void diff_halfmatchTest()
{
TestDiffOperations dmp = new TestDiffOperations();
dmp.Diff_Timeout = 1;
// No match.
Assert.IsNull(dmp.HalfMatch("1234567890", "abcdef"));
Assert.IsNull(dmp.HalfMatch("12345", "23"));
// Single Match.
CollectionAssert.AreEqual(new string[] { "12", "90", "a", "z", "345678" }, dmp.HalfMatch("1234567890", "a345678z"));
CollectionAssert.AreEqual(new string[] { "a", "z", "12", "90", "345678" }, dmp.HalfMatch("a345678z", "1234567890"));
CollectionAssert.AreEqual(new string[] { "abc", "z", "1234", "0", "56789" }, dmp.HalfMatch("abc56789z", "1234567890"));
CollectionAssert.AreEqual(new string[] { "a", "xyz", "1", "7890", "23456" }, dmp.HalfMatch("a23456xyz", "1234567890"));
// Multiple Matches.
CollectionAssert.AreEqual(new string[] { "12123", "123121", "a", "z", "1234123451234" }, dmp.HalfMatch("121231234123451234123121", "a1234123451234z"));
CollectionAssert.AreEqual(new string[] { "", "-=-=-=-=-=", "x", "", "x-=-=-=-=-=-=-=" }, dmp.HalfMatch("x-=-=-=-=-=-=-=-=-=-=-=-=", "xx-=-=-=-=-=-=-="));
CollectionAssert.AreEqual(new string[] { "-=-=-=-=-=", "", "", "y", "-=-=-=-=-=-=-=y" }, dmp.HalfMatch("-=-=-=-=-=-=-=-=-=-=-=-=y", "-=-=-=-=-=-=-=yy"));
// Non-optimal halfmatch.
// Optimal diff would be -q+x=H-i+e=lloHe+Hu=llo-Hew+y not -qHillo+x=HelloHe-w+Hulloy
CollectionAssert.AreEqual(new string[] { "qHillo", "w", "x", "Hulloy", "HelloHe" }, dmp.HalfMatch("qHilloHelloHew", "xHelloHeHulloy"));
// Optimal no halfmatch.
dmp.Diff_Timeout = 0;
Assert.IsNull(dmp.HalfMatch("qHilloHelloHew", "xHelloHeHulloy"));
}
public void diff_levenshteinTest()
{
TestDiffOperations dmp = new TestDiffOperations();
List <Diff> diffs = new List <Diff> {
new Diff(Operation.DELETE, "abc"),
new Diff(Operation.INSERT, "1234"),
new Diff(Operation.EQUAL, "xyz")
};
Assert.AreEqual(4, dmp.ToLevenshteinDistance(diffs), "diff_levenshtein: Levenshtein with trailing equality.");
diffs = new List <Diff> {
new Diff(Operation.EQUAL, "xyz"),
new Diff(Operation.DELETE, "abc"),
new Diff(Operation.INSERT, "1234")
};
Assert.AreEqual(4, dmp.ToLevenshteinDistance(diffs), "diff_levenshtein: Levenshtein with leading equality.");
diffs = new List <Diff> {
new Diff(Operation.DELETE, "abc"),
new Diff(Operation.EQUAL, "xyz"),
new Diff(Operation.INSERT, "1234")
};
Assert.AreEqual(7, dmp.ToLevenshteinDistance(diffs), "diff_levenshtein: Levenshtein with middle equality.");
}
public void diff_linesToCharsTest()
{
TestDiffOperations dmp = new TestDiffOperations();
// Convert lines down to characters.
List <string> tmpVector = new List <string>();
tmpVector.Add("");
tmpVector.Add("alpha\n");
tmpVector.Add("beta\n");
Object[] result = dmp.LinesToChars("alpha\nbeta\nalpha\n", "beta\nalpha\nbeta\n");
Assert.AreEqual("\u0001\u0002\u0001", result[0]);
Assert.AreEqual("\u0002\u0001\u0002", result[1]);
CollectionAssert.AreEqual(tmpVector, (List <string>)result[2]);
tmpVector.Clear();
tmpVector.Add("");
tmpVector.Add("alpha\r\n");
tmpVector.Add("beta\r\n");
tmpVector.Add("\r\n");
result = dmp.LinesToChars("", "alpha\r\nbeta\r\n\r\n\r\n");
Assert.AreEqual("", result[0]);
Assert.AreEqual("\u0001\u0002\u0003\u0003", result[1]);
CollectionAssert.AreEqual(tmpVector, (List <string>)result[2]);
tmpVector.Clear();
tmpVector.Add("");
tmpVector.Add("a");
tmpVector.Add("b");
result = dmp.LinesToChars("a", "b");
Assert.AreEqual("\u0001", result[0]);
Assert.AreEqual("\u0002", result[1]);
CollectionAssert.AreEqual(tmpVector, (List <string>)result[2]);
// 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(Convert.ToChar(x));
}
Assert.AreEqual(n, tmpVector.Count);
string lines = lineList.ToString();
string chars = charList.ToString();
Assert.AreEqual(n, chars.Length);
tmpVector.Insert(0, "");
result = dmp.LinesToChars(lines, "");
Assert.AreEqual(chars, result[0]);
Assert.AreEqual("", result[1]);
CollectionAssert.AreEqual(tmpVector, (List <string>)result[2]);
}
public void diff_prettyHtmlTest()
{
TestDiffOperations dmp = new TestDiffOperations();
// Pretty print.
List <Diff> diffs = new List <Diff> {
new Diff(Operation.EQUAL, "a\n"),
new Diff(Operation.DELETE, "<B>b</B>"),
new Diff(Operation.INSERT, "c&d")
};
Assert.AreEqual("<span>a¶<br></span><del style=\"background:#ffe6e6;\"><B>b</B></del><ins style=\"background:#e6ffe6;\">c&d</ins>",
dmp.ToPrettyHtml(diffs));
}
public void diff_commonSuffixTest()
{
TestDiffOperations dmp = new TestDiffOperations();
// Detect any common suffix.
// Null case.
Assert.AreEqual(0, dmp.FindCommonSuffix("abc", "xyz"));
// Non-null case.
Assert.AreEqual(4, dmp.FindCommonSuffix("abcdef1234", "xyz1234"));
// Whole case.
Assert.AreEqual(4, dmp.FindCommonSuffix("1234", "xyz1234"));
}
public void diff_charsToLinesTest()
{
TestDiffOperations dmp = new TestDiffOperations();
// Convert chars up to lines.
List <Diff> diffs = new List <Diff> {
new Diff(Operation.EQUAL, "\u0001\u0002\u0001"),
new Diff(Operation.INSERT, "\u0002\u0001\u0002")
};
List <string> tmpVector = new List <string>();
tmpVector.Add("");
tmpVector.Add("alpha\n");
tmpVector.Add("beta\n");
dmp.CharsToLines(diffs, tmpVector);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.EQUAL, "alpha\nbeta\nalpha\n"),
new Diff(Operation.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(Convert.ToChar(x));
}
Assert.AreEqual(n, tmpVector.Count);
string lines = lineList.ToString();
string chars = charList.ToString();
Assert.AreEqual(n, chars.Length);
tmpVector.Insert(0, "");
diffs = new List <Diff> {
new Diff(Operation.DELETE, chars)
};
dmp.CharsToLines(diffs, tmpVector);
CollectionAssert.AreEqual(new List <Diff>
{
new Diff(Operation.DELETE, lines)
}, diffs);
}
public void diff_textTest()
{
TestDiffOperations dmp = new TestDiffOperations();
// Compute the source and destination texts.
List <Diff> diffs = new List <Diff> {
new Diff(Operation.EQUAL, "jump"),
new Diff(Operation.DELETE, "s"),
new Diff(Operation.INSERT, "ed"),
new Diff(Operation.EQUAL, " over "),
new Diff(Operation.DELETE, "the"),
new Diff(Operation.INSERT, "a"),
new Diff(Operation.EQUAL, " lazy")
};
Assert.AreEqual("jumps over the lazy", dmp.GetText1(diffs));
Assert.AreEqual("jumped over a lazy", dmp.GetText2(diffs));
}
public void diff_xIndexTest()
{
TestDiffOperations dmp = new TestDiffOperations();
// Translate a location in text1 to text2.
List <Diff> diffs = new List <Diff> {
new Diff(Operation.DELETE, "a"),
new Diff(Operation.INSERT, "1234"),
new Diff(Operation.EQUAL, "xyz")
};
Assert.AreEqual(5, dmp.FindIndex(diffs, 2), "diff_xIndex: Translation on equality.");
diffs = new List <Diff> {
new Diff(Operation.EQUAL, "a"),
new Diff(Operation.DELETE, "1234"),
new Diff(Operation.EQUAL, "xyz")
};
Assert.AreEqual(1, dmp.FindIndex(diffs, 3), "diff_xIndex: Translation on deletion.");
}
public void diff_bisectTest()
{
TestDiffOperations dmp = new TestDiffOperations();
// Normal.
string a = "cat";
string b = "map";
// Since the resulting diff hasn't been normalized, it would be ok if
// the insertion and deletion pairs are swapped.
// If the order changes, tweak this test as required.
List <Diff> diffs = new List <Diff> {
new Diff(Operation.DELETE, "c"), new Diff(Operation.INSERT, "m"), new Diff(Operation.EQUAL, "a"), new Diff(Operation.DELETE, "t"), new Diff(Operation.INSERT, "p")
};
CollectionAssert.AreEqual(diffs, dmp.Bisect(a, b, DateTime.MaxValue));
// Timeout.
diffs = new List <Diff> {
new Diff(Operation.DELETE, "cat"), new Diff(Operation.INSERT, "map")
};
CollectionAssert.AreEqual(diffs, dmp.Bisect(a, b, DateTime.MinValue));
}
public void diff_commonOverlapTest()
{
TestDiffOperations dmp = new TestDiffOperations();
// Detect any suffix/prefix overlap.
// Null case.
Assert.AreEqual(0, dmp.CommonOverlap("", "abcd"));
// Whole case.
Assert.AreEqual(3, dmp.CommonOverlap("abc", "abcd"));
// No overlap.
Assert.AreEqual(0, dmp.CommonOverlap("123456", "abcd"));
// Overlap.
Assert.AreEqual(3, dmp.CommonOverlap("123456xxx", "xxxabcd"));
// Unicode.
// Some overly clever languages (C#) may treat ligatures as equal to their
// component letters. E.g. U+FB01 == 'fi'
Assert.AreEqual(0, dmp.CommonOverlap("fi", "\ufb01i"));
}
public void diff_mainTest()
{
TestDiffOperations dmp = new TestDiffOperations();
// Perform a trivial diff.
List <Diff> diffs = new List <Diff> {
};
CollectionAssert.AreEqual(diffs, dmp.GetDifference("", "", false), "diff_main: Null case.");
diffs = new List <Diff> {
new Diff(Operation.EQUAL, "abc")
};
CollectionAssert.AreEqual(diffs, dmp.GetDifference("abc", "abc", false), "diff_main: Equality.");
diffs = new List <Diff> {
new Diff(Operation.EQUAL, "ab"), new Diff(Operation.INSERT, "123"), new Diff(Operation.EQUAL, "c")
};
CollectionAssert.AreEqual(diffs, dmp.GetDifference("abc", "ab123c", false), "diff_main: Simple insertion.");
diffs = new List <Diff> {
new Diff(Operation.EQUAL, "a"), new Diff(Operation.DELETE, "123"), new Diff(Operation.EQUAL, "bc")
};
CollectionAssert.AreEqual(diffs, dmp.GetDifference("a123bc", "abc", false), "diff_main: Simple deletion.");
diffs = new List <Diff> {
new Diff(Operation.EQUAL, "a"), new Diff(Operation.INSERT, "123"), new Diff(Operation.EQUAL, "b"), new Diff(Operation.INSERT, "456"), new Diff(Operation.EQUAL, "c")
};
CollectionAssert.AreEqual(diffs, dmp.GetDifference("abc", "a123b456c", false), "diff_main: Two insertions.");
diffs = new List <Diff> {
new Diff(Operation.EQUAL, "a"), new Diff(Operation.DELETE, "123"), new Diff(Operation.EQUAL, "b"), new Diff(Operation.DELETE, "456"), new Diff(Operation.EQUAL, "c")
};
CollectionAssert.AreEqual(diffs, dmp.GetDifference("a123b456c", "abc", false), "diff_main: Two deletions.");
// Perform a real diff.
// Switch off the timeout.
dmp.Diff_Timeout = 0;
diffs = new List <Diff> {
new Diff(Operation.DELETE, "a"), new Diff(Operation.INSERT, "b")
};
CollectionAssert.AreEqual(diffs, dmp.GetDifference("a", "b", false), "diff_main: Simple case #1.");
diffs = new List <Diff> {
new Diff(Operation.DELETE, "Apple"), new Diff(Operation.INSERT, "Banana"), new Diff(Operation.EQUAL, "s are a"), new Diff(Operation.INSERT, "lso"), new Diff(Operation.EQUAL, " fruit.")
};
CollectionAssert.AreEqual(diffs, dmp.GetDifference("Apples are a fruit.", "Bananas are also fruit.", false), "diff_main: Simple case #2.");
diffs = new List <Diff> {
new Diff(Operation.DELETE, "a"), new Diff(Operation.INSERT, "\u0680"), new Diff(Operation.EQUAL, "x"), new Diff(Operation.DELETE, "\t"), new Diff(Operation.INSERT, new string (new char[] { (char)0 }))
};
CollectionAssert.AreEqual(diffs, dmp.GetDifference("ax\t", "\u0680x" + (char)0, false), "diff_main: Simple case #3.");
diffs = new List <Diff> {
new Diff(Operation.DELETE, "1"), new Diff(Operation.EQUAL, "a"), new Diff(Operation.DELETE, "y"), new Diff(Operation.EQUAL, "b"), new Diff(Operation.DELETE, "2"), new Diff(Operation.INSERT, "xab")
};
CollectionAssert.AreEqual(diffs, dmp.GetDifference("1ayb2", "abxab", false), "diff_main: Overlap #1.");
diffs = new List <Diff> {
new Diff(Operation.INSERT, "xaxcx"), new Diff(Operation.EQUAL, "abc"), new Diff(Operation.DELETE, "y")
};
CollectionAssert.AreEqual(diffs, dmp.GetDifference("abcy", "xaxcxabc", false), "diff_main: Overlap #2.");
diffs = new List <Diff> {
new Diff(Operation.DELETE, "ABCD"), new Diff(Operation.EQUAL, "a"), new Diff(Operation.DELETE, "="), new Diff(Operation.INSERT, "-"), new Diff(Operation.EQUAL, "bcd"), new Diff(Operation.DELETE, "="), new Diff(Operation.INSERT, "-"), new Diff(Operation.EQUAL, "efghijklmnopqrs"), new Diff(Operation.DELETE, "EFGHIJKLMNOefg")
};
CollectionAssert.AreEqual(diffs, dmp.GetDifference("ABCDa=bcd=efghijklmnopqrsEFGHIJKLMNOefg", "a-bcd-efghijklmnopqrs", false), "diff_main: Overlap #3.");
diffs = new List <Diff> {
new Diff(Operation.INSERT, " "), new Diff(Operation.EQUAL, "a"), new Diff(Operation.INSERT, "nd"), new Diff(Operation.EQUAL, " [[Pennsylvania]]"), new Diff(Operation.DELETE, " and [[New")
};
CollectionAssert.AreEqual(diffs, dmp.GetDifference("a [[Pennsylvania]] and [[New", " and [[Pennsylvania]]", false), "diff_main: Large equality.");
dmp.Diff_Timeout = 0.1f; // 100ms
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;
}
DateTime startTime = DateTime.Now;
dmp.GetDifference(a, b);
DateTime endTime = DateTime.Now;
// Test that we took at least the timeout period.
Assert.IsTrue(new TimeSpan(((long)(dmp.Diff_Timeout * 1000)) * 10000) <= endTime - startTime);
// Test that we didn't take forever (be forgiving).
// Theoretically this test could fail very occasionally if the
// OS task swaps or locks up for a second at the wrong moment.
Assert.IsTrue(new TimeSpan(((long)(dmp.Diff_Timeout * 1000)) * 10000 * 2) > endTime - startTime);
dmp.Diff_Timeout = 0;
// Test the linemode speedup.
// Must be long to pass the 100 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";
CollectionAssert.AreEqual(dmp.GetDifference(a, b, true), dmp.GetDifference(a, b, false), "diff_main: Simple line-mode.");
a = "1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890";
b = "abcdefghijabcdefghijabcdefghijabcdefghijabcdefghijabcdefghijabcdefghijabcdefghijabcdefghijabcdefghijabcdefghijabcdefghijabcdefghij";
CollectionAssert.AreEqual(dmp.GetDifference(a, b, true), dmp.GetDifference(a, b, false), "diff_main: Single line-mode.");
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.GetDifference(a, b, true));
string[] texts_textmode = diff_rebuildtexts(dmp.GetDifference(a, b, false));
CollectionAssert.AreEqual(texts_textmode, texts_linemode, "diff_main: Overlap line-mode.");
// Test null inputs -- not needed because nulls can't be passed in C#.
}
public void diff_deltaTest()
{
TestDiffOperations dmp = new TestDiffOperations();
// Convert a diff into delta string.
List <Diff> diffs = new List <Diff> {
new Diff(Operation.EQUAL, "jump"),
new Diff(Operation.DELETE, "s"),
new Diff(Operation.INSERT, "ed"),
new Diff(Operation.EQUAL, " over "),
new Diff(Operation.DELETE, "the"),
new Diff(Operation.INSERT, "a"),
new Diff(Operation.EQUAL, " lazy"),
new Diff(Operation.INSERT, "old dog")
};
string text1 = dmp.GetText1(diffs);
Assert.AreEqual("jumps over the lazy", text1);
string delta = dmp.ToDelta(diffs);
Assert.AreEqual("=4\t-1\t+ed\t=6\t-3\t+a\t=5\t+old dog", delta);
// Convert delta string into a diff.
CollectionAssert.AreEqual(diffs, dmp.FromDelta(text1, delta));
// Generates error (19 < 20).
try {
dmp.FromDelta(text1 + "x", delta);
Assert.Fail("diff_fromDelta: Too long.");
} catch (ArgumentException) {
// Exception expected.
}
// Generates error (19 > 18).
try {
dmp.FromDelta(text1.Substring(1), delta);
Assert.Fail("diff_fromDelta: Too short.");
} catch (ArgumentException) {
// Exception expected.
}
// Generates error (%c3%xy invalid Unicode).
try {
dmp.FromDelta("", "+%c3%xy");
Assert.Fail("diff_fromDelta: Invalid character.");
} catch (ArgumentException) {
// Exception expected.
}
// Test deltas with special characters.
char zero = (char)0;
char one = (char)1;
char two = (char)2;
diffs = new List <Diff> {
new Diff(Operation.EQUAL, "\u0680 " + zero + " \t %"),
new Diff(Operation.DELETE, "\u0681 " + one + " \n ^"),
new Diff(Operation.INSERT, "\u0682 " + two + " \\ |")
};
text1 = dmp.GetText1(diffs);
Assert.AreEqual("\u0680 " + zero + " \t %\u0681 " + one + " \n ^", text1);
delta = dmp.ToDelta(diffs);
// Lowercase, due to UrlEncode uses lower.
Assert.AreEqual("=7\t-7\t+%da%82 %02 %5c %7c", delta, "diff_toDelta: Unicode.");
CollectionAssert.AreEqual(diffs, dmp.FromDelta(text1, delta), "diff_fromDelta: Unicode.");
// Verify pool of unchanged characters.
diffs = new List <Diff> {
new Diff(Operation.INSERT, "A-Z a-z 0-9 - _ . ! ~ * ' ( ) ; / ? : @ & = + $ , # ")
};
string text2 = dmp.GetText2(diffs);
Assert.AreEqual("A-Z a-z 0-9 - _ . ! ~ * \' ( ) ; / ? : @ & = + $ , # ", text2, "diff_text2: Unchanged characters.");
delta = dmp.ToDelta(diffs);
Assert.AreEqual("+A-Z a-z 0-9 - _ . ! ~ * \' ( ) ; / ? : @ & = + $ , # ", delta, "diff_toDelta: Unchanged characters.");
// Convert delta string into a diff.
CollectionAssert.AreEqual(diffs, dmp.FromDelta("", delta), "diff_fromDelta: Unchanged characters.");
}
public void diff_cleanupEfficiencyTest()
{
TestDiffOperations dmp = new TestDiffOperations();
// Cleanup operationally trivial equalities.
dmp.Diff_EditCost = 4;
// Null case.
List <Diff> diffs = new List <Diff> ();
dmp.CleanupEfficiency(diffs);
CollectionAssert.AreEqual(new List <Diff>(), diffs);
// No elimination.
diffs = new List <Diff> {
new Diff(Operation.DELETE, "ab"),
new Diff(Operation.INSERT, "12"),
new Diff(Operation.EQUAL, "wxyz"),
new Diff(Operation.DELETE, "cd"),
new Diff(Operation.INSERT, "34")
};
dmp.CleanupEfficiency(diffs);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.DELETE, "ab"),
new Diff(Operation.INSERT, "12"),
new Diff(Operation.EQUAL, "wxyz"),
new Diff(Operation.DELETE, "cd"),
new Diff(Operation.INSERT, "34")
}, diffs);
// Four-edit elimination.
diffs = new List <Diff> {
new Diff(Operation.DELETE, "ab"),
new Diff(Operation.INSERT, "12"),
new Diff(Operation.EQUAL, "xyz"),
new Diff(Operation.DELETE, "cd"),
new Diff(Operation.INSERT, "34")
};
dmp.CleanupEfficiency(diffs);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.DELETE, "abxyzcd"),
new Diff(Operation.INSERT, "12xyz34")
}, diffs);
// Three-edit elimination.
diffs = new List <Diff> {
new Diff(Operation.INSERT, "12"),
new Diff(Operation.EQUAL, "x"),
new Diff(Operation.DELETE, "cd"),
new Diff(Operation.INSERT, "34")
};
dmp.CleanupEfficiency(diffs);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.DELETE, "xcd"),
new Diff(Operation.INSERT, "12x34")
}, diffs);
// Backpass elimination.
diffs = new List <Diff> {
new Diff(Operation.DELETE, "ab"),
new Diff(Operation.INSERT, "12"),
new Diff(Operation.EQUAL, "xy"),
new Diff(Operation.INSERT, "34"),
new Diff(Operation.EQUAL, "z"),
new Diff(Operation.DELETE, "cd"),
new Diff(Operation.INSERT, "56")
};
dmp.CleanupEfficiency(diffs);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.DELETE, "abxyzcd"),
new Diff(Operation.INSERT, "12xy34z56")
}, diffs);
// High cost elimination.
dmp.Diff_EditCost = 5;
diffs = new List <Diff> {
new Diff(Operation.DELETE, "ab"),
new Diff(Operation.INSERT, "12"),
new Diff(Operation.EQUAL, "wxyz"),
new Diff(Operation.DELETE, "cd"),
new Diff(Operation.INSERT, "34")
};
dmp.CleanupEfficiency(diffs);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.DELETE, "abwxyzcd"),
new Diff(Operation.INSERT, "12wxyz34")
}, diffs);
dmp.Diff_EditCost = 4;
}
public void diff_cleanupSemanticTest()
{
TestDiffOperations dmp = new TestDiffOperations();
// Cleanup semantically trivial equalities.
// Null case.
List <Diff> diffs = new List <Diff>();
dmp.CleanupSemantic(diffs);
CollectionAssert.AreEqual(new List <Diff>(), diffs);
// No elimination #1.
diffs = new List <Diff> {
new Diff(Operation.DELETE, "ab"),
new Diff(Operation.INSERT, "cd"),
new Diff(Operation.EQUAL, "12"),
new Diff(Operation.DELETE, "e")
};
dmp.CleanupSemantic(diffs);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.DELETE, "ab"),
new Diff(Operation.INSERT, "cd"),
new Diff(Operation.EQUAL, "12"),
new Diff(Operation.DELETE, "e")
}, diffs);
// No elimination #2.
diffs = new List <Diff> {
new Diff(Operation.DELETE, "abc"),
new Diff(Operation.INSERT, "ABC"),
new Diff(Operation.EQUAL, "1234"),
new Diff(Operation.DELETE, "wxyz")
};
dmp.CleanupSemantic(diffs);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.DELETE, "abc"),
new Diff(Operation.INSERT, "ABC"),
new Diff(Operation.EQUAL, "1234"),
new Diff(Operation.DELETE, "wxyz")
}, diffs);
// Simple elimination.
diffs = new List <Diff> {
new Diff(Operation.DELETE, "a"),
new Diff(Operation.EQUAL, "b"),
new Diff(Operation.DELETE, "c")
};
dmp.CleanupSemantic(diffs);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.DELETE, "abc"),
new Diff(Operation.INSERT, "b")
}, diffs);
// Backpass elimination.
diffs = new List <Diff> {
new Diff(Operation.DELETE, "ab"),
new Diff(Operation.EQUAL, "cd"),
new Diff(Operation.DELETE, "e"),
new Diff(Operation.EQUAL, "f"),
new Diff(Operation.INSERT, "g")
};
dmp.CleanupSemantic(diffs);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.DELETE, "abcdef"),
new Diff(Operation.INSERT, "cdfg")
}, diffs);
// Multiple eliminations.
diffs = new List <Diff> {
new Diff(Operation.INSERT, "1"),
new Diff(Operation.EQUAL, "A"),
new Diff(Operation.DELETE, "B"),
new Diff(Operation.INSERT, "2"),
new Diff(Operation.EQUAL, "_"),
new Diff(Operation.INSERT, "1"),
new Diff(Operation.EQUAL, "A"),
new Diff(Operation.DELETE, "B"),
new Diff(Operation.INSERT, "2")
};
dmp.CleanupSemantic(diffs);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.DELETE, "AB_AB"),
new Diff(Operation.INSERT, "1A2_1A2")
}, diffs);
// Word boundaries.
diffs = new List <Diff> {
new Diff(Operation.EQUAL, "The c"),
new Diff(Operation.DELETE, "ow and the c"),
new Diff(Operation.EQUAL, "at.")
};
dmp.CleanupSemantic(diffs);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.EQUAL, "The "),
new Diff(Operation.DELETE, "cow and the "),
new Diff(Operation.EQUAL, "cat.")
}, diffs);
// No overlap elimination.
diffs = new List <Diff> {
new Diff(Operation.DELETE, "abcxx"),
new Diff(Operation.INSERT, "xxdef")
};
dmp.CleanupSemantic(diffs);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.DELETE, "abcxx"),
new Diff(Operation.INSERT, "xxdef")
}, diffs);
// Overlap elimination.
diffs = new List <Diff> {
new Diff(Operation.DELETE, "abcxxx"),
new Diff(Operation.INSERT, "xxxdef")
};
dmp.CleanupSemantic(diffs);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.DELETE, "abc"),
new Diff(Operation.EQUAL, "xxx"),
new Diff(Operation.INSERT, "def")
}, diffs);
// Reverse overlap elimination.
diffs = new List <Diff> {
new Diff(Operation.DELETE, "xxxabc"),
new Diff(Operation.INSERT, "defxxx")
};
dmp.CleanupSemantic(diffs);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.INSERT, "def"),
new Diff(Operation.EQUAL, "xxx"),
new Diff(Operation.DELETE, "abc")
}, diffs);
// Two overlap eliminations.
diffs = new List <Diff> {
new Diff(Operation.DELETE, "abcd1212"),
new Diff(Operation.INSERT, "1212efghi"),
new Diff(Operation.EQUAL, "----"),
new Diff(Operation.DELETE, "A3"),
new Diff(Operation.INSERT, "3BC")
};
dmp.CleanupSemantic(diffs);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.DELETE, "abcd"),
new Diff(Operation.EQUAL, "1212"),
new Diff(Operation.INSERT, "efghi"),
new Diff(Operation.EQUAL, "----"),
new Diff(Operation.DELETE, "A"),
new Diff(Operation.EQUAL, "3"),
new Diff(Operation.INSERT, "BC")
}, diffs);
}
public void diff_cleanupSemanticLosslessTest()
{
TestDiffOperations dmp = new TestDiffOperations();
// Slide diffs to match logical boundaries.
// Null case.
List <Diff> diffs = new List <Diff>();
dmp.CleanupSemanticLossless(diffs);
CollectionAssert.AreEqual(new List <Diff>(), diffs);
// Blank lines.
diffs = new List <Diff> {
new Diff(Operation.EQUAL, "AAA\r\n\r\nBBB"),
new Diff(Operation.INSERT, "\r\nDDD\r\n\r\nBBB"),
new Diff(Operation.EQUAL, "\r\nEEE")
};
dmp.CleanupSemanticLossless(diffs);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.EQUAL, "AAA\r\n\r\n"),
new Diff(Operation.INSERT, "BBB\r\nDDD\r\n\r\n"),
new Diff(Operation.EQUAL, "BBB\r\nEEE")
}, diffs);
// Line boundaries.
diffs = new List <Diff> {
new Diff(Operation.EQUAL, "AAA\r\nBBB"),
new Diff(Operation.INSERT, " DDD\r\nBBB"),
new Diff(Operation.EQUAL, " EEE")
};
dmp.CleanupSemanticLossless(diffs);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.EQUAL, "AAA\r\n"),
new Diff(Operation.INSERT, "BBB DDD\r\n"),
new Diff(Operation.EQUAL, "BBB EEE")
}, diffs);
// Word boundaries.
diffs = new List <Diff> {
new Diff(Operation.EQUAL, "The c"),
new Diff(Operation.INSERT, "ow and the c"),
new Diff(Operation.EQUAL, "at.")
};
dmp.CleanupSemanticLossless(diffs);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.EQUAL, "The "),
new Diff(Operation.INSERT, "cow and the "),
new Diff(Operation.EQUAL, "cat.")
}, diffs);
// Alphanumeric boundaries.
diffs = new List <Diff> {
new Diff(Operation.EQUAL, "The-c"),
new Diff(Operation.INSERT, "ow-and-the-c"),
new Diff(Operation.EQUAL, "at.")
};
dmp.CleanupSemanticLossless(diffs);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.EQUAL, "The-"),
new Diff(Operation.INSERT, "cow-and-the-"),
new Diff(Operation.EQUAL, "cat.")
}, diffs);
// Hitting the start.
diffs = new List <Diff> {
new Diff(Operation.EQUAL, "a"),
new Diff(Operation.DELETE, "a"),
new Diff(Operation.EQUAL, "ax")
};
dmp.CleanupSemanticLossless(diffs);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.DELETE, "a"),
new Diff(Operation.EQUAL, "aax")
}, diffs);
// Hitting the end.
diffs = new List <Diff> {
new Diff(Operation.EQUAL, "xa"),
new Diff(Operation.DELETE, "a"),
new Diff(Operation.EQUAL, "a")
};
dmp.CleanupSemanticLossless(diffs);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.EQUAL, "xaa"),
new Diff(Operation.DELETE, "a")
}, diffs);
// Sentence boundaries.
diffs = new List <Diff> {
new Diff(Operation.EQUAL, "The xxx. The "),
new Diff(Operation.INSERT, "zzz. The "),
new Diff(Operation.EQUAL, "yyy.")
};
dmp.CleanupSemanticLossless(diffs);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.EQUAL, "The xxx."),
new Diff(Operation.INSERT, " The zzz."),
new Diff(Operation.EQUAL, " The yyy.")
}, diffs);
}
public void diff_cleanupMergeTest()
{
TestDiffOperations dmp = new TestDiffOperations();
// Cleanup a messy diff.
// Null case.
List <Diff> diffs = new List <Diff>();
dmp.CleanupMerge(diffs);
CollectionAssert.AreEqual(new List <Diff>(), diffs);
// No change case.
diffs = new List <Diff> {
new Diff(Operation.EQUAL, "a"), new Diff(Operation.DELETE, "b"), new Diff(Operation.INSERT, "c")
};
dmp.CleanupMerge(diffs);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.EQUAL, "a"), new Diff(Operation.DELETE, "b"), new Diff(Operation.INSERT, "c")
}, diffs);
// Merge equalities.
diffs = new List <Diff> {
new Diff(Operation.EQUAL, "a"), new Diff(Operation.EQUAL, "b"), new Diff(Operation.EQUAL, "c")
};
dmp.CleanupMerge(diffs);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.EQUAL, "abc")
}, diffs);
// Merge deletions.
diffs = new List <Diff> {
new Diff(Operation.DELETE, "a"), new Diff(Operation.DELETE, "b"), new Diff(Operation.DELETE, "c")
};
dmp.CleanupMerge(diffs);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.DELETE, "abc")
}, diffs);
// Merge insertions.
diffs = new List <Diff> {
new Diff(Operation.INSERT, "a"), new Diff(Operation.INSERT, "b"), new Diff(Operation.INSERT, "c")
};
dmp.CleanupMerge(diffs);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.INSERT, "abc")
}, diffs);
// Merge interweave.
diffs = new List <Diff> {
new Diff(Operation.DELETE, "a"), new Diff(Operation.INSERT, "b"), new Diff(Operation.DELETE, "c"), new Diff(Operation.INSERT, "d"), new Diff(Operation.EQUAL, "e"), new Diff(Operation.EQUAL, "f")
};
dmp.CleanupMerge(diffs);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.DELETE, "ac"), new Diff(Operation.INSERT, "bd"), new Diff(Operation.EQUAL, "ef")
}, diffs);
// Prefix and suffix detection.
diffs = new List <Diff> {
new Diff(Operation.DELETE, "a"), new Diff(Operation.INSERT, "abc"), new Diff(Operation.DELETE, "dc")
};
dmp.CleanupMerge(diffs);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.EQUAL, "a"), new Diff(Operation.DELETE, "d"), new Diff(Operation.INSERT, "b"), new Diff(Operation.EQUAL, "c")
}, diffs);
// Prefix and suffix detection with equalities.
diffs = new List <Diff> {
new Diff(Operation.EQUAL, "x"), new Diff(Operation.DELETE, "a"), new Diff(Operation.INSERT, "abc"), new Diff(Operation.DELETE, "dc"), new Diff(Operation.EQUAL, "y")
};
dmp.CleanupMerge(diffs);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.EQUAL, "xa"), new Diff(Operation.DELETE, "d"), new Diff(Operation.INSERT, "b"), new Diff(Operation.EQUAL, "cy")
}, diffs);
// Slide edit left.
diffs = new List <Diff> {
new Diff(Operation.EQUAL, "a"), new Diff(Operation.INSERT, "ba"), new Diff(Operation.EQUAL, "c")
};
dmp.CleanupMerge(diffs);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.INSERT, "ab"), new Diff(Operation.EQUAL, "ac")
}, diffs);
// Slide edit right.
diffs = new List <Diff> {
new Diff(Operation.EQUAL, "c"), new Diff(Operation.INSERT, "ab"), new Diff(Operation.EQUAL, "a")
};
dmp.CleanupMerge(diffs);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.EQUAL, "ca"), new Diff(Operation.INSERT, "ba")
}, diffs);
// Slide edit left recursive.
diffs = new List <Diff> {
new Diff(Operation.EQUAL, "a"), new Diff(Operation.DELETE, "b"), new Diff(Operation.EQUAL, "c"), new Diff(Operation.DELETE, "ac"), new Diff(Operation.EQUAL, "x")
};
dmp.CleanupMerge(diffs);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.DELETE, "abc"), new Diff(Operation.EQUAL, "acx")
}, diffs);
// Slide edit right recursive.
diffs = new List <Diff> {
new Diff(Operation.EQUAL, "x"), new Diff(Operation.DELETE, "ca"), new Diff(Operation.EQUAL, "c"), new Diff(Operation.DELETE, "b"), new Diff(Operation.EQUAL, "a")
};
dmp.CleanupMerge(diffs);
CollectionAssert.AreEqual(new List <Diff> {
new Diff(Operation.EQUAL, "xca"), new Diff(Operation.DELETE, "cba")
}, diffs);
}