public void DiffCleanupSemanticLosslessTest()
{
diff_match_patchTest dmp = new diff_match_patchTest();
// Slide diffs to match logical boundaries.
// Null case.
List<Diff> diffs = new List<Diff>();
dmp.DiffCleanupSemanticLossless(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.DiffCleanupSemanticLossless(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.DiffCleanupSemanticLossless(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.DiffCleanupSemanticLossless(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.DiffCleanupSemanticLossless(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.DiffCleanupSemanticLossless(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.DiffCleanupSemanticLossless(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.DiffCleanupSemanticLossless(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);
}