public void diff_mainTest()
{
diff_match_patchTest dmp = new diff_match_patchTest();
// Perform a trivial diff.
List<Diff> diffs = new List<Diff>{new Diff(Operation.EQUAL, "abc")};
CollectionAssert.AreEqual(diffs, dmp.diff_main("abc", "abc", false), "diff_main: Null case.");
diffs = new List<Diff>{new Diff(Operation.EQUAL, "ab"), new Diff(Operation.INSERT, "123"), new Diff(Operation.EQUAL, "c")};
CollectionAssert.AreEqual(diffs, dmp.diff_main("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.diff_main("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.diff_main("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.diff_main("a123b456c", "abc", false), "diff_main: Two deletions.");
// Perform a real diff.
// Switch off the timeout.
dmp.Diff_Timeout = 0;
dmp.Diff_DualThreshold = 32;
diffs = new List<Diff>{new Diff(Operation.DELETE, "a"), new Diff(Operation.INSERT, "b")};
CollectionAssert.AreEqual(diffs, dmp.diff_main("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.diff_main("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.diff_main("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.diff_main("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.diff_main("abcy", "xaxcxabc", false), "diff_main: Overlap #2.");
// Sub-optimal double-ended diff.
dmp.Diff_DualThreshold = 2;
diffs = new List<Diff>{new Diff(Operation.INSERT, "x"), new Diff(Operation.EQUAL, "a"), new Diff(Operation.DELETE, "b"), new Diff(Operation.INSERT, "x"), new Diff(Operation.EQUAL, "c"), new Diff(Operation.DELETE, "y"), new Diff(Operation.INSERT, "xabc")};
CollectionAssert.AreEqual(diffs, dmp.diff_main("abcy", "xaxcxabc", false), "diff_main: Overlap #3.");
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;
}
Assert.IsNull(dmp.diff_map(a, b), "diff_main: Timeout.");
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";
CollectionAssert.AreEqual(dmp.diff_main(a, b, true), dmp.diff_main(a, b, false), "diff_main: Simple.");
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));
CollectionAssert.AreEqual(texts_textmode, texts_linemode, "diff_main: Overlap.");
}