public void DiffLevenshteinTest()
{
diff_match_patchTest dmp = new diff_match_patchTest();
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.DiffLevenshtein(diffs), "DiffLevenshtein: 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.DiffLevenshtein(diffs), "DiffLevenshtein: 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.DiffLevenshtein(diffs), "DiffLevenshtein: Levenshtein with middle equality.");
}