Lucene.Net.Search.TestRegexpRandom.TestRegexps C# (CSharp) Method

        public virtual void TestRegexps()
        {
            int num = AtLeast(1);
            for (int i = 0; i < num; i++)
            {
                AssertPatternHits("NNN", 1);
                AssertPatternHits(".NN", 10);
                AssertPatternHits("N.N", 10);
                AssertPatternHits("NN.", 10);
            }

            for (int i = 0; i < num; i++)
            {
                AssertPatternHits(".{1,2}N", 100);
                AssertPatternHits("N.{1,2}", 100);
                AssertPatternHits(".{1,3}", 1000);

                AssertPatternHits("NN[3-7]", 5);
                AssertPatternHits("N[2-6][3-7]", 25);
                AssertPatternHits("[1-5][2-6][3-7]", 125);
                AssertPatternHits("[0-4][3-7][4-8]", 125);
                AssertPatternHits("[2-6][0-4]N", 25);
                AssertPatternHits("[2-6]NN", 5);

                AssertPatternHits("NN.*", 10);
                AssertPatternHits("N.*", 100);
                AssertPatternHits(".*", 1000);

                AssertPatternHits(".*NN", 10);
                AssertPatternHits(".*N", 100);

                AssertPatternHits("N.*N", 10);

                // combo of ? and * operators
                AssertPatternHits(".N.*", 100);
                AssertPatternHits("N..*", 100);

                AssertPatternHits(".*N.", 100);
                AssertPatternHits(".*..", 1000);
                AssertPatternHits(".*.N", 100);
            }
        }
    }