Lucene.Net.Search.TestTermRangeFilter.TestRangeFilterRand C# (CSharp) Method

        public virtual void TestRangeFilterRand()
        {
            IndexReader reader = SignedIndexReader;
            IndexSearcher search = NewSearcher(reader);

            string minRP = Pad(SignedIndexDir.MinR);
            string maxRP = Pad(SignedIndexDir.MaxR);

            int numDocs = reader.NumDocs;

            Assert.AreEqual(numDocs, 1 + MaxId - MinId, "num of docs");

            ScoreDoc[] result;
            Query q = new TermQuery(new Term("body", "body"));

            // test extremes, bounded on both ends

            result = search.Search(q, TermRangeFilter.NewStringRange("rand", minRP, maxRP, T, T), numDocs).ScoreDocs;
            Assert.AreEqual(numDocs, result.Length, "find all");

            result = search.Search(q, TermRangeFilter.NewStringRange("rand", minRP, maxRP, T, F), numDocs).ScoreDocs;
            Assert.AreEqual(numDocs - 1, result.Length, "all but biggest");

            result = search.Search(q, TermRangeFilter.NewStringRange("rand", minRP, maxRP, F, T), numDocs).ScoreDocs;
            Assert.AreEqual(numDocs - 1, result.Length, "all but smallest");

            result = search.Search(q, TermRangeFilter.NewStringRange("rand", minRP, maxRP, F, F), numDocs).ScoreDocs;
            Assert.AreEqual(numDocs - 2, result.Length, "all but extremes");

            // unbounded

            result = search.Search(q, TermRangeFilter.NewStringRange("rand", minRP, null, T, F), numDocs).ScoreDocs;
            Assert.AreEqual(numDocs, result.Length, "smallest and up");

            result = search.Search(q, TermRangeFilter.NewStringRange("rand", null, maxRP, F, T), numDocs).ScoreDocs;
            Assert.AreEqual(numDocs, result.Length, "biggest and down");

            result = search.Search(q, TermRangeFilter.NewStringRange("rand", minRP, null, F, F), numDocs).ScoreDocs;
            Assert.AreEqual(numDocs - 1, result.Length, "not smallest, but up");

            result = search.Search(q, TermRangeFilter.NewStringRange("rand", null, maxRP, F, F), numDocs).ScoreDocs;
            Assert.AreEqual(numDocs - 1, result.Length, "not biggest, but down");

            // very small sets

            result = search.Search(q, TermRangeFilter.NewStringRange("rand", minRP, minRP, F, F), numDocs).ScoreDocs;
            Assert.AreEqual(0, result.Length, "min,min,F,F");
            result = search.Search(q, TermRangeFilter.NewStringRange("rand", maxRP, maxRP, F, F), numDocs).ScoreDocs;
            Assert.AreEqual(0, result.Length, "max,max,F,F");

            result = search.Search(q, TermRangeFilter.NewStringRange("rand", minRP, minRP, T, T), numDocs).ScoreDocs;
            Assert.AreEqual(1, result.Length, "min,min,T,T");
            result = search.Search(q, TermRangeFilter.NewStringRange("rand", null, minRP, F, T), numDocs).ScoreDocs;
            Assert.AreEqual(1, result.Length, "nul,min,F,T");

            result = search.Search(q, TermRangeFilter.NewStringRange("rand", maxRP, maxRP, T, T), numDocs).ScoreDocs;
            Assert.AreEqual(1, result.Length, "max,max,T,T");
            result = search.Search(q, TermRangeFilter.NewStringRange("rand", maxRP, null, T, F), numDocs).ScoreDocs;
            Assert.AreEqual(1, result.Length, "max,nul,T,T");
        }