nicTest.diff_match_patchTest.diff_halfmatchTest C# (CSharp) Method

    public void diff_halfmatchTest() {
      diff_match_patchTest dmp = new diff_match_patchTest();
      dmp.Diff_Timeout = 1;
      // No match.
      Assert.IsNull(dmp.diff_halfMatch("1234567890", "abcdef"));

      Assert.IsNull(dmp.diff_halfMatch("12345", "23"));

      // Single Match.
      CollectionAssert.AreEqual(new string[] { "12", "90", "a", "z", "345678" }, dmp.diff_halfMatch("1234567890", "a345678z"));

      CollectionAssert.AreEqual(new string[] { "a", "z", "12", "90", "345678" }, dmp.diff_halfMatch("a345678z", "1234567890"));

      CollectionAssert.AreEqual(new string[] { "abc", "z", "1234", "0", "56789" }, dmp.diff_halfMatch("abc56789z", "1234567890"));

      CollectionAssert.AreEqual(new string[] { "a", "xyz", "1", "7890", "23456" }, dmp.diff_halfMatch("a23456xyz", "1234567890"));

      // Multiple Matches.
      CollectionAssert.AreEqual(new string[] { "12123", "123121", "a", "z", "1234123451234" }, dmp.diff_halfMatch("121231234123451234123121", "a1234123451234z"));

      CollectionAssert.AreEqual(new string[] { "", "-=-=-=-=-=", "x", "", "x-=-=-=-=-=-=-=" }, dmp.diff_halfMatch("x-=-=-=-=-=-=-=-=-=-=-=-=", "xx-=-=-=-=-=-=-="));

      CollectionAssert.AreEqual(new string[] { "-=-=-=-=-=", "", "", "y", "-=-=-=-=-=-=-=y" }, dmp.diff_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.diff_halfMatch("qHilloHelloHew", "xHelloHeHulloy"));

      // Optimal no halfmatch.
      dmp.Diff_Timeout = 0;
      Assert.IsNull(dmp.diff_halfMatch("qHilloHelloHew", "xHelloHeHulloy"));
    }