public virtual void TestBigrams()
{
NGramTokenFilter filter = new NGramTokenFilter(TEST_VERSION_CURRENT, input, 2, 2);
AssertTokenStreamContents(filter, new string[] { "ab", "bc", "cd", "de" }, new int[] { 0, 0, 0, 0 }, new int[] { 5, 5, 5, 5 }, new int[] { 1, 0, 0, 0 });
}