public void diff_prettyHtmlTest() {
diff_match_patchTest dmp = new diff_match_patchTest();
// 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.diff_prettyHtml(diffs));
}