namespace Lucene.Net.Search
{
    using NUnit.Framework;

    /*
         * Licensed to the Apache Software Foundation (ASF) under one or more
         * contributor license agreements.  See the NOTICE file distributed with
         * this work for additional information regarding copyright ownership.
         * The ASF licenses this file to You under the Apache License, Version 2.0
         * (the "License"); you may not use this file except in compliance with
         * the License.  You may obtain a copy of the License at
         *
         *     http://www.apache.org/licenses/LICENSE-2.0
         *
         * Unless required by applicable law or agreed to in writing, software
         * distributed under the License is distributed on an "AS IS" BASIS,
         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
         * See the License for the specific language governing permissions and
         * limitations under the License.
         */

    using Term = Lucene.Net.Index.Term;

    /// <summary>
    /// TestExplanations subclass focusing on basic query types
    /// </summary>
    [TestFixture]
    public class TestSimpleExplanations : TestExplanations
    {
        // we focus on queries that don't rewrite to other queries.
        // if we get those covered well, then the ones that rewrite should
        // also be covered.

        /* simple term tests */

        [Test]
        public virtual void TestT1()
        {
            Qtest(new TermQuery(new Term(FIELD, "w1")), new int[] { 0, 1, 2, 3 });
        }

        [Test]
        public virtual void TestT2()
        {
            TermQuery termQuery = new TermQuery(new Term(FIELD, "w1"));
            termQuery.Boost = 100;
            Qtest(termQuery, new int[] { 0, 1, 2, 3 });
        }

        /* MatchAllDocs */

        [Test]
        public virtual void TestMA1()
        {
            Qtest(new MatchAllDocsQuery(), new int[] { 0, 1, 2, 3 });
        }

        [Test]
        public virtual void TestMA2()
        {
            Query q = new MatchAllDocsQuery();
            q.Boost = 1000;
            Qtest(q, new int[] { 0, 1, 2, 3 });
        }

        /* some simple phrase tests */

        [Test]
        public virtual void TestP1()
        {
            PhraseQuery phraseQuery = new PhraseQuery();
            phraseQuery.Add(new Term(FIELD, "w1"));
            phraseQuery.Add(new Term(FIELD, "w2"));
            Qtest(phraseQuery, new int[] { 0 });
        }

        [Test]
        public virtual void TestP2()
        {
            PhraseQuery phraseQuery = new PhraseQuery();
            phraseQuery.Add(new Term(FIELD, "w1"));
            phraseQuery.Add(new Term(FIELD, "w3"));
            Qtest(phraseQuery, new int[] { 1, 3 });
        }

        [Test]
        public virtual void TestP3()
        {
            PhraseQuery phraseQuery = new PhraseQuery();
            phraseQuery.Slop = 1;
            phraseQuery.Add(new Term(FIELD, "w1"));
            phraseQuery.Add(new Term(FIELD, "w2"));
            Qtest(phraseQuery, new int[] { 0, 1, 2 });
        }

        [Test]
        public virtual void TestP4()
        {
            PhraseQuery phraseQuery = new PhraseQuery();
            phraseQuery.Slop = 1;
            phraseQuery.Add(new Term(FIELD, "w2"));
            phraseQuery.Add(new Term(FIELD, "w3"));
            Qtest(phraseQuery, new int[] { 0, 1, 2, 3 });
        }

        [Test]
        public virtual void TestP5()
        {
            PhraseQuery phraseQuery = new PhraseQuery();
            phraseQuery.Slop = 1;
            phraseQuery.Add(new Term(FIELD, "w3"));
            phraseQuery.Add(new Term(FIELD, "w2"));
            Qtest(phraseQuery, new int[] { 1, 3 });
        }

        [Test]
        public virtual void TestP6()
        {
            PhraseQuery phraseQuery = new PhraseQuery();
            phraseQuery.Slop = 2;
            phraseQuery.Add(new Term(FIELD, "w3"));
            phraseQuery.Add(new Term(FIELD, "w2"));
            Qtest(phraseQuery, new int[] { 0, 1, 3 });
        }

        [Test]
        public virtual void TestP7()
        {
            PhraseQuery phraseQuery = new PhraseQuery();
            phraseQuery.Slop = 3;
            phraseQuery.Add(new Term(FIELD, "w3"));
            phraseQuery.Add(new Term(FIELD, "w2"));
            Qtest(phraseQuery, new int[] { 0, 1, 2, 3 });
        }

        /* some simple filtered query tests */

        [Test]
        public virtual void TestFQ1()
        {
            Qtest(new FilteredQuery(new TermQuery(new Term(FIELD, "w1")), new ItemizedFilter(new int[] { 0, 1, 2, 3 })), new int[] { 0, 1, 2, 3 });
        }

        [Test]
        public virtual void TestFQ2()
        {
            Qtest(new FilteredQuery(new TermQuery(new Term(FIELD, "w1")), new ItemizedFilter(new int[] { 0, 2, 3 })), new int[] { 0, 2, 3 });
        }

        [Test]
        public virtual void TestFQ3()
        {
            Qtest(new FilteredQuery(new TermQuery(new Term(FIELD, "xx")), new ItemizedFilter(new int[] { 1, 3 })), new int[] { 3 });
        }

        [Test]
        public virtual void TestFQ4()
        {
            TermQuery termQuery = new TermQuery(new Term(FIELD, "xx"));
            termQuery.Boost = 1000;
            Qtest(new FilteredQuery(termQuery, new ItemizedFilter(new int[] { 1, 3 })), new int[] { 3 });
        }

        [Test]
        public virtual void TestFQ6()
        {
            Query q = new FilteredQuery(new TermQuery(new Term(FIELD, "xx")), new ItemizedFilter(new int[] { 1, 3 }));
            q.Boost = 1000;
            Qtest(q, new int[] { 3 });
        }

        /* ConstantScoreQueries */

        [Test]
        public virtual void TestCSQ1()
        {
            Query q = new ConstantScoreQuery(new ItemizedFilter(new int[] { 0, 1, 2, 3 }));
            Qtest(q, new int[] { 0, 1, 2, 3 });
        }

        [Test]
        public virtual void TestCSQ2()
        {
            Query q = new ConstantScoreQuery(new ItemizedFilter(new int[] { 1, 3 }));
            Qtest(q, new int[] { 1, 3 });
        }

        [Test]
        public virtual void TestCSQ3()
        {
            Query q = new ConstantScoreQuery(new ItemizedFilter(new int[] { 0, 2 }));
            q.Boost = 1000;
            Qtest(q, new int[] { 0, 2 });
        }

        /* DisjunctionMaxQuery */

        [Test]
        public virtual void TestDMQ1()
        {
            DisjunctionMaxQuery q = new DisjunctionMaxQuery(0.0f);
            q.Add(new TermQuery(new Term(FIELD, "w1")));
            q.Add(new TermQuery(new Term(FIELD, "w5")));
            Qtest(q, new int[] { 0, 1, 2, 3 });
        }

        [Test]
        public virtual void TestDMQ2()
        {
            DisjunctionMaxQuery q = new DisjunctionMaxQuery(0.5f);
            q.Add(new TermQuery(new Term(FIELD, "w1")));
            q.Add(new TermQuery(new Term(FIELD, "w5")));
            Qtest(q, new int[] { 0, 1, 2, 3 });
        }

        [Test]
        public virtual void TestDMQ3()
        {
            DisjunctionMaxQuery q = new DisjunctionMaxQuery(0.5f);
            q.Add(new TermQuery(new Term(FIELD, "QQ")));
            q.Add(new TermQuery(new Term(FIELD, "w5")));
            Qtest(q, new int[] { 0 });
        }

        [Test]
        public virtual void TestDMQ4()
        {
            DisjunctionMaxQuery q = new DisjunctionMaxQuery(0.5f);
            q.Add(new TermQuery(new Term(FIELD, "QQ")));
            q.Add(new TermQuery(new Term(FIELD, "xx")));
            Qtest(q, new int[] { 2, 3 });
        }

        [Test]
        public virtual void TestDMQ5()
        {
            DisjunctionMaxQuery q = new DisjunctionMaxQuery(0.5f);

            BooleanQuery booleanQuery = new BooleanQuery();
            booleanQuery.Add(new TermQuery(new Term(FIELD, "yy")), Occur.SHOULD);
            booleanQuery.Add(new TermQuery(new Term(FIELD, "QQ")), Occur.MUST_NOT);

            q.Add(booleanQuery);
            q.Add(new TermQuery(new Term(FIELD, "xx")));
            Qtest(q, new int[] { 2, 3 });
        }

        [Test]
        public virtual void TestDMQ6()
        {
            DisjunctionMaxQuery q = new DisjunctionMaxQuery(0.5f);

            BooleanQuery booleanQuery = new BooleanQuery();
            booleanQuery.Add(new TermQuery(new Term(FIELD, "yy")), Occur.MUST_NOT);
            booleanQuery.Add(new TermQuery(new Term(FIELD, "w3")), Occur.SHOULD);

            q.Add(booleanQuery);
            q.Add(new TermQuery(new Term(FIELD, "xx")));
            Qtest(q, new int[] { 0, 1, 2, 3 });
        }

        [Test]
        public virtual void TestDMQ7()
        {
            DisjunctionMaxQuery q = new DisjunctionMaxQuery(0.5f);

            BooleanQuery booleanQuery = new BooleanQuery();
            booleanQuery.Add(new TermQuery(new Term(FIELD, "yy")), Occur.MUST_NOT);
            booleanQuery.Add(new TermQuery(new Term(FIELD, "w3")), Occur.SHOULD);

            q.Add(booleanQuery);
            q.Add(new TermQuery(new Term(FIELD, "w2")));
            Qtest(q, new int[] { 0, 1, 2, 3 });
        }

        [Test]
        public virtual void TestDMQ8()
        {
            DisjunctionMaxQuery q = new DisjunctionMaxQuery(0.5f);

            BooleanQuery booleanQuery = new BooleanQuery();
            booleanQuery.Add(new TermQuery(new Term(FIELD, "yy")), Occur.SHOULD);

            TermQuery boostedQuery = new TermQuery(new Term(FIELD, "w5"));
            boostedQuery.Boost = 100;
            booleanQuery.Add(boostedQuery, Occur.SHOULD);
            q.Add(booleanQuery);

            TermQuery xxBoostedQuery = new TermQuery(new Term(FIELD, "xx"));
            xxBoostedQuery.Boost = 100000;
            q.Add(xxBoostedQuery);

            Qtest(q, new int[] { 0, 2, 3 });
        }

        [Test]
        public virtual void TestDMQ9()
        {
            DisjunctionMaxQuery q = new DisjunctionMaxQuery(0.5f);

            BooleanQuery booleanQuery = new BooleanQuery();
            booleanQuery.Add(new TermQuery(new Term(FIELD, "yy")), Occur.SHOULD);

            TermQuery boostedQuery = new TermQuery(new Term(FIELD, "w5"));
            boostedQuery.Boost = 100;
            booleanQuery.Add(boostedQuery, Occur.SHOULD);
            q.Add(booleanQuery);

            TermQuery xxBoostedQuery = new TermQuery(new Term(FIELD, "xx"));
            xxBoostedQuery.Boost = 0;
            q.Add(xxBoostedQuery);

            Qtest(q, new int[] { 0, 2, 3 });
        }

        /* MultiPhraseQuery */

        [Test]
        public virtual void TestMPQ1()
        {
            MultiPhraseQuery q = new MultiPhraseQuery();
            q.Add(Ta(new string[] { "w1" }));
            q.Add(Ta(new string[] { "w2", "w3", "xx" }));
            Qtest(q, new int[] { 0, 1, 2, 3 });
        }

        [Test]
        public virtual void TestMPQ2()
        {
            MultiPhraseQuery q = new MultiPhraseQuery();
            q.Add(Ta(new string[] { "w1" }));
            q.Add(Ta(new string[] { "w2", "w3" }));
            Qtest(q, new int[] { 0, 1, 3 });
        }

        [Test]
        public virtual void TestMPQ3()
        {
            MultiPhraseQuery q = new MultiPhraseQuery();
            q.Add(Ta(new string[] { "w1", "xx" }));
            q.Add(Ta(new string[] { "w2", "w3" }));
            Qtest(q, new int[] { 0, 1, 2, 3 });
        }

        [Test]
        public virtual void TestMPQ4()
        {
            MultiPhraseQuery q = new MultiPhraseQuery();
            q.Add(Ta(new string[] { "w1" }));
            q.Add(Ta(new string[] { "w2" }));
            Qtest(q, new int[] { 0 });
        }

        [Test]
        public virtual void TestMPQ5()
        {
            MultiPhraseQuery q = new MultiPhraseQuery();
            q.Add(Ta(new string[] { "w1" }));
            q.Add(Ta(new string[] { "w2" }));
            q.Slop = 1;
            Qtest(q, new int[] { 0, 1, 2 });
        }

        [Test]
        public virtual void TestMPQ6()
        {
            MultiPhraseQuery q = new MultiPhraseQuery();
            q.Add(Ta(new string[] { "w1", "w3" }));
            q.Add(Ta(new string[] { "w2" }));
            q.Slop = 1;
            Qtest(q, new int[] { 0, 1, 2, 3 });
        }

        /* some simple tests of boolean queries containing term queries */

        [Test]
        public virtual void TestBQ1()
        {
            BooleanQuery query = new BooleanQuery();
            query.Add(new TermQuery(new Term(FIELD, "w1")), Occur.MUST);
            query.Add(new TermQuery(new Term(FIELD, "w2")), Occur.MUST);
            Qtest(query, new int[] { 0, 1, 2, 3 });
        }

        [Test]
        public virtual void TestBQ2()
        {
            BooleanQuery query = new BooleanQuery();
            query.Add(new TermQuery(new Term(FIELD, "yy")), Occur.MUST);
            query.Add(new TermQuery(new Term(FIELD, "w3")), Occur.MUST);
            Qtest(query, new int[] { 2, 3 });
        }

        [Test]
        public virtual void TestBQ3()
        {
            BooleanQuery query = new BooleanQuery();
            query.Add(new TermQuery(new Term(FIELD, "yy")), Occur.SHOULD);
            query.Add(new TermQuery(new Term(FIELD, "w3")), Occur.MUST);
            Qtest(query, new int[] { 0, 1, 2, 3 });
        }

        [Test]
        public virtual void TestBQ4()
        {
            BooleanQuery outerQuery = new BooleanQuery();
            outerQuery.Add(new TermQuery(new Term(FIELD, "w1")), Occur.SHOULD);

            BooleanQuery innerQuery = new BooleanQuery();
            innerQuery.Add(new TermQuery(new Term(FIELD, "xx")), Occur.MUST_NOT);
            innerQuery.Add(new TermQuery(new Term(FIELD, "w2")), Occur.SHOULD);
            outerQuery.Add(innerQuery, Occur.SHOULD);

            Qtest(outerQuery, new int[] { 0, 1, 2, 3 });
        }

        [Test]
        public virtual void TestBQ5()
        {
            BooleanQuery outerQuery = new BooleanQuery();
            outerQuery.Add(new TermQuery(new Term(FIELD, "w1")), Occur.SHOULD);

            BooleanQuery innerQuery = new BooleanQuery();
            innerQuery.Add(new TermQuery(new Term(FIELD, "qq")), Occur.MUST);
            innerQuery.Add(new TermQuery(new Term(FIELD, "w2")), Occur.SHOULD);
            outerQuery.Add(innerQuery, Occur.SHOULD);

            Qtest(outerQuery, new int[] { 0, 1, 2, 3 });
        }

        [Test]
        public virtual void TestBQ6()
        {
            BooleanQuery outerQuery = new BooleanQuery();
            outerQuery.Add(new TermQuery(new Term(FIELD, "w1")), Occur.SHOULD);

            BooleanQuery innerQuery = new BooleanQuery();
            innerQuery.Add(new TermQuery(new Term(FIELD, "qq")), Occur.MUST_NOT);
            innerQuery.Add(new TermQuery(new Term(FIELD, "w5")), Occur.SHOULD);
            outerQuery.Add(innerQuery, Occur.MUST_NOT);

            Qtest(outerQuery, new int[] { 1, 2, 3 });
        }

        [Test]
        public virtual void TestBQ7()
        {
            BooleanQuery outerQuery = new BooleanQuery();
            outerQuery.Add(new TermQuery(new Term(FIELD, "w1")), Occur.MUST);

            BooleanQuery innerQuery = new BooleanQuery();
            innerQuery.Add(new TermQuery(new Term(FIELD, "qq")), Occur.SHOULD);

            BooleanQuery childLeft = new BooleanQuery();
            childLeft.Add(new TermQuery(new Term(FIELD, "xx")), Occur.SHOULD);
            childLeft.Add(new TermQuery(new Term(FIELD, "w2")), Occur.MUST_NOT);
            innerQuery.Add(childLeft, Occur.SHOULD);

            BooleanQuery childRight = new BooleanQuery();
            childRight.Add(new TermQuery(new Term(FIELD, "w3")), Occur.MUST);
            childRight.Add(new TermQuery(new Term(FIELD, "w4")), Occur.MUST);
            innerQuery.Add(childRight, Occur.SHOULD);

            outerQuery.Add(innerQuery, Occur.MUST);

            Qtest(outerQuery, new int[] { 0 });
        }

        [Test]
        public virtual void TestBQ8()
        {
            BooleanQuery outerQuery = new BooleanQuery();
            outerQuery.Add(new TermQuery(new Term(FIELD, "w1")), Occur.MUST);

            BooleanQuery innerQuery = new BooleanQuery();
            innerQuery.Add(new TermQuery(new Term(FIELD, "qq")), Occur.SHOULD);

            BooleanQuery childLeft = new BooleanQuery();
            childLeft.Add(new TermQuery(new Term(FIELD, "xx")), Occur.SHOULD);
            childLeft.Add(new TermQuery(new Term(FIELD, "w2")), Occur.MUST_NOT);
            innerQuery.Add(childLeft, Occur.SHOULD);

            BooleanQuery childRight = new BooleanQuery();
            childRight.Add(new TermQuery(new Term(FIELD, "w3")), Occur.MUST);
            childRight.Add(new TermQuery(new Term(FIELD, "w4")), Occur.MUST);
            innerQuery.Add(childRight, Occur.SHOULD);

            outerQuery.Add(innerQuery, Occur.SHOULD);

            Qtest(outerQuery, new int[] { 0, 1, 2, 3 });
        }

        [Test]
        public virtual void TestBQ9()
        {
            BooleanQuery outerQuery = new BooleanQuery();
            outerQuery.Add(new TermQuery(new Term(FIELD, "w1")), Occur.MUST);

            BooleanQuery innerQuery = new BooleanQuery();
            innerQuery.Add(new TermQuery(new Term(FIELD, "qq")), Occur.SHOULD);

            BooleanQuery childLeft = new BooleanQuery();
            childLeft.Add(new TermQuery(new Term(FIELD, "xx")), Occur.MUST_NOT);
            childLeft.Add(new TermQuery(new Term(FIELD, "w2")), Occur.SHOULD);
            innerQuery.Add(childLeft, Occur.SHOULD);

            BooleanQuery childRight = new BooleanQuery();
            childRight.Add(new TermQuery(new Term(FIELD, "w3")), Occur.MUST);
            childRight.Add(new TermQuery(new Term(FIELD, "w4")), Occur.MUST);
            innerQuery.Add(childRight, Occur.MUST_NOT);

            outerQuery.Add(innerQuery, Occur.SHOULD);

            Qtest(outerQuery, new int[] { 0, 1, 2, 3 });
        }

        [Test]
        public virtual void TestBQ10()
        {
            BooleanQuery outerQuery = new BooleanQuery();
            outerQuery.Add(new TermQuery(new Term(FIELD, "w1")), Occur.MUST);

            BooleanQuery innerQuery = new BooleanQuery();
            innerQuery.Add(new TermQuery(new Term(FIELD, "qq")), Occur.SHOULD);

            BooleanQuery childLeft = new BooleanQuery();
            childLeft.Add(new TermQuery(new Term(FIELD, "xx")), Occur.MUST_NOT);
            childLeft.Add(new TermQuery(new Term(FIELD, "w2")), Occur.SHOULD);
            innerQuery.Add(childLeft, Occur.SHOULD);

            BooleanQuery childRight = new BooleanQuery();
            childRight.Add(new TermQuery(new Term(FIELD, "w3")), Occur.MUST);
            childRight.Add(new TermQuery(new Term(FIELD, "w4")), Occur.MUST);
            innerQuery.Add(childRight, Occur.MUST_NOT);

            outerQuery.Add(innerQuery, Occur.MUST);

            Qtest(outerQuery, new int[] { 1 });
        }

        [Test]
        public virtual void TestBQ11()
        {
            BooleanQuery query = new BooleanQuery();
            query.Add(new TermQuery(new Term(FIELD, "w1")), Occur.SHOULD);
            TermQuery boostedQuery = new TermQuery(new Term(FIELD, "w1"));
            boostedQuery.Boost = 1000;
            query.Add(boostedQuery, Occur.SHOULD);

            Qtest(query, new int[] { 0, 1, 2, 3 });
        }

        [Test]
        public virtual void TestBQ14()
        {
            BooleanQuery q = new BooleanQuery(true);
            q.Add(new TermQuery(new Term(FIELD, "QQQQQ")), Occur.SHOULD);
            q.Add(new TermQuery(new Term(FIELD, "w1")), Occur.SHOULD);
            Qtest(q, new int[] { 0, 1, 2, 3 });
        }

        [Test]
        public virtual void TestBQ15()
        {
            BooleanQuery q = new BooleanQuery(true);
            q.Add(new TermQuery(new Term(FIELD, "QQQQQ")), Occur.MUST_NOT);
            q.Add(new TermQuery(new Term(FIELD, "w1")), Occur.SHOULD);
            Qtest(q, new int[] { 0, 1, 2, 3 });
        }

        [Test]
        public virtual void TestBQ16()
        {
            BooleanQuery q = new BooleanQuery(true);
            q.Add(new TermQuery(new Term(FIELD, "QQQQQ")), Occur.SHOULD);

            BooleanQuery booleanQuery = new BooleanQuery();
            booleanQuery.Add(new TermQuery(new Term(FIELD, "w1")), Occur.SHOULD);
            booleanQuery.Add(new TermQuery(new Term(FIELD, "xx")), Occur.MUST_NOT);

            q.Add(booleanQuery, Occur.SHOULD);
            Qtest(q, new int[] { 0, 1 });
        }

        [Test]
        public virtual void TestBQ17()
        {
            BooleanQuery q = new BooleanQuery(true);
            q.Add(new TermQuery(new Term(FIELD, "w2")), Occur.SHOULD);

            BooleanQuery booleanQuery = new BooleanQuery();
            booleanQuery.Add(new TermQuery(new Term(FIELD, "w1")), Occur.SHOULD);
            booleanQuery.Add(new TermQuery(new Term(FIELD, "xx")), Occur.MUST_NOT);

            q.Add(booleanQuery, Occur.SHOULD);
            Qtest(q, new int[] { 0, 1, 2, 3 });
        }

        [Test]
        public virtual void TestBQ19()
        {
            BooleanQuery query = new BooleanQuery();
            query.Add(new TermQuery(new Term(FIELD, "yy")), Occur.MUST_NOT);
            query.Add(new TermQuery(new Term(FIELD, "w3")), Occur.SHOULD);

            Qtest(query, new int[] { 0, 1 });
        }

        [Test]
        public virtual void TestBQ20()
        {
            BooleanQuery q = new BooleanQuery();
            q.MinimumNumberShouldMatch = 2;
            q.Add(new TermQuery(new Term(FIELD, "QQQQQ")), Occur.SHOULD);
            q.Add(new TermQuery(new Term(FIELD, "yy")), Occur.SHOULD);
            q.Add(new TermQuery(new Term(FIELD, "zz")), Occur.SHOULD);
            q.Add(new TermQuery(new Term(FIELD, "w5")), Occur.SHOULD);
            q.Add(new TermQuery(new Term(FIELD, "w4")), Occur.SHOULD);

            Qtest(q, new int[] { 0, 3 });
        }

        /* BQ of TQ: using alt so some fields have zero boost and some don't */

        [Test]
        public virtual void TestMultiFieldBQ1()
        {
            BooleanQuery query = new BooleanQuery();
            query.Add(new TermQuery(new Term(FIELD, "w1")), Occur.MUST);
            query.Add(new TermQuery(new Term(ALTFIELD, "w2")), Occur.MUST);

            Qtest(query, new int[] { 0, 1, 2, 3 });
        }

        [Test]
        public virtual void TestMultiFieldBQ2()
        {
            BooleanQuery query = new BooleanQuery();
            query.Add(new TermQuery(new Term(FIELD, "yy")), Occur.MUST);
            query.Add(new TermQuery(new Term(ALTFIELD, "w3")), Occur.MUST);

            Qtest(query, new int[] { 2, 3 });
        }

        [Test]
        public virtual void TestMultiFieldBQ3()
        {
            BooleanQuery query = new BooleanQuery();
            query.Add(new TermQuery(new Term(FIELD, "yy")), Occur.SHOULD);
            query.Add(new TermQuery(new Term(ALTFIELD, "w3")), Occur.MUST);

            Qtest(query, new int[] { 0, 1, 2, 3 });
        }

        [Test]
        public virtual void TestMultiFieldBQ4()
        {
            BooleanQuery outerQuery = new BooleanQuery();
            outerQuery.Add(new TermQuery(new Term(FIELD, "w1")), Occur.SHOULD);

            BooleanQuery innerQuery = new BooleanQuery();
            innerQuery.Add(new TermQuery(new Term(FIELD, "xx")), Occur.MUST_NOT);
            innerQuery.Add(new TermQuery(new Term(ALTFIELD, "w2")), Occur.SHOULD);
            outerQuery.Add(innerQuery, Occur.SHOULD);

            Qtest(outerQuery, new int[] { 0, 1, 2, 3 });
        }

        [Test]
        public virtual void TestMultiFieldBQ5()
        {
            BooleanQuery outerQuery = new BooleanQuery();
            outerQuery.Add(new TermQuery(new Term(FIELD, "w1")), Occur.SHOULD);

            BooleanQuery innerQuery = new BooleanQuery();
            innerQuery.Add(new TermQuery(new Term(ALTFIELD, "qq")), Occur.MUST);
            innerQuery.Add(new TermQuery(new Term(ALTFIELD, "w2")), Occur.SHOULD);
            outerQuery.Add(innerQuery, Occur.SHOULD);

            Qtest(outerQuery, new int[] { 0, 1, 2, 3 });
        }

        [Test]
        public virtual void TestMultiFieldBQ6()
        {
            BooleanQuery outerQuery = new BooleanQuery();
            outerQuery.Add(new TermQuery(new Term(FIELD, "w1")), Occur.SHOULD);

            BooleanQuery innerQuery = new BooleanQuery();
            innerQuery.Add(new TermQuery(new Term(ALTFIELD, "qq")), Occur.MUST_NOT);
            innerQuery.Add(new TermQuery(new Term(ALTFIELD, "w5")), Occur.SHOULD);
            outerQuery.Add(innerQuery, Occur.MUST_NOT);

            Qtest(outerQuery, new int[] { 1, 2, 3 });
        }

        [Test]
        public virtual void TestMultiFieldBQ7()
        {
            BooleanQuery outerQuery = new BooleanQuery();
            outerQuery.Add(new TermQuery(new Term(FIELD, "w1")), Occur.MUST);

            BooleanQuery innerQuery = new BooleanQuery();
            innerQuery.Add(new TermQuery(new Term(ALTFIELD, "qq")), Occur.SHOULD);

            BooleanQuery childLeft = new BooleanQuery();
            childLeft.Add(new TermQuery(new Term(ALTFIELD, "xx")), Occur.SHOULD);
            childLeft.Add(new TermQuery(new Term(ALTFIELD, "w2")), Occur.MUST_NOT);
            innerQuery.Add(childLeft, Occur.SHOULD);

            BooleanQuery childRight = new BooleanQuery();
            childRight.Add(new TermQuery(new Term(ALTFIELD, "w3")), Occur.MUST);
            childRight.Add(new TermQuery(new Term(ALTFIELD, "w4")), Occur.MUST);
            innerQuery.Add(childRight, Occur.SHOULD);

            outerQuery.Add(innerQuery, Occur.MUST);

            Qtest(outerQuery, new int[] { 0 });
        }

        [Test]
        public virtual void TestMultiFieldBQ8()
        {
            BooleanQuery outerQuery = new BooleanQuery();
            outerQuery.Add(new TermQuery(new Term(ALTFIELD, "w1")), Occur.MUST);

            BooleanQuery innerQuery = new BooleanQuery();
            innerQuery.Add(new TermQuery(new Term(FIELD, "qq")), Occur.SHOULD);

            BooleanQuery childLeft = new BooleanQuery();
            childLeft.Add(new TermQuery(new Term(ALTFIELD, "xx")), Occur.SHOULD);
            childLeft.Add(new TermQuery(new Term(FIELD, "w2")), Occur.MUST_NOT);
            innerQuery.Add(childLeft, Occur.SHOULD);

            BooleanQuery childRight = new BooleanQuery();
            childRight.Add(new TermQuery(new Term(ALTFIELD, "w3")), Occur.MUST);
            childRight.Add(new TermQuery(new Term(FIELD, "w4")), Occur.MUST);
            innerQuery.Add(childRight, Occur.SHOULD);

            outerQuery.Add(innerQuery, Occur.SHOULD);

            Qtest(outerQuery, new int[] { 0, 1, 2, 3 });
        }

        [Test]
        public virtual void TestMultiFieldBQ9()
        {
            BooleanQuery outerQuery = new BooleanQuery();
            outerQuery.Add(new TermQuery(new Term(FIELD, "w1")), Occur.MUST);

            BooleanQuery innerQuery = new BooleanQuery();
            innerQuery.Add(new TermQuery(new Term(ALTFIELD, "qq")), Occur.SHOULD);

            BooleanQuery childLeft = new BooleanQuery();
            childLeft.Add(new TermQuery(new Term(FIELD, "xx")), Occur.MUST_NOT);
            childLeft.Add(new TermQuery(new Term(FIELD, "w2")), Occur.SHOULD);
            innerQuery.Add(childLeft, Occur.SHOULD);

            BooleanQuery childRight = new BooleanQuery();
            childRight.Add(new TermQuery(new Term(ALTFIELD, "w3")), Occur.MUST);
            childRight.Add(new TermQuery(new Term(FIELD, "w4")), Occur.MUST);
            innerQuery.Add(childRight, Occur.MUST_NOT);

            outerQuery.Add(innerQuery, Occur.SHOULD);

            Qtest(outerQuery, new int[] { 0, 1, 2, 3 });
        }

        [Test]
        public virtual void TestMultiFieldBQ10()
        {
            BooleanQuery outerQuery = new BooleanQuery();
            outerQuery.Add(new TermQuery(new Term(FIELD, "w1")), Occur.MUST);

            BooleanQuery innerQuery = new BooleanQuery();
            innerQuery.Add(new TermQuery(new Term(ALTFIELD, "qq")), Occur.SHOULD);

            BooleanQuery childLeft = new BooleanQuery();
            childLeft.Add(new TermQuery(new Term(FIELD, "xx")), Occur.MUST_NOT);
            childLeft.Add(new TermQuery(new Term(ALTFIELD, "w2")), Occur.SHOULD);
            innerQuery.Add(childLeft, Occur.SHOULD);

            BooleanQuery childRight = new BooleanQuery();
            childRight.Add(new TermQuery(new Term(ALTFIELD, "w3")), Occur.MUST);
            childRight.Add(new TermQuery(new Term(FIELD, "w4")), Occur.MUST);
            innerQuery.Add(childRight, Occur.MUST_NOT);

            outerQuery.Add(innerQuery, Occur.MUST);

            Qtest(outerQuery, new int[] { 1 });
        }

        /* BQ of PQ: using alt so some fields have zero boost and some don't */

        [Test]
        public virtual void TestMultiFieldBQofPQ1()
        {
            BooleanQuery query = new BooleanQuery();

            PhraseQuery leftChild = new PhraseQuery();
            leftChild.Add(new Term(FIELD, "w1"));
            leftChild.Add(new Term(FIELD, "w2"));
            query.Add(leftChild, Occur.SHOULD);

            PhraseQuery rightChild = new PhraseQuery();
            rightChild.Add(new Term(ALTFIELD, "w1"));
            rightChild.Add(new Term(ALTFIELD, "w2"));
            query.Add(rightChild, Occur.SHOULD);

            Qtest(query, new int[] { 0 });
        }

        [Test]
        public virtual void TestMultiFieldBQofPQ2()
        {
            BooleanQuery query = new BooleanQuery();

            PhraseQuery leftChild = new PhraseQuery();
            leftChild.Add(new Term(FIELD, "w1"));
            leftChild.Add(new Term(FIELD, "w3"));
            query.Add(leftChild, Occur.SHOULD);

            PhraseQuery rightChild = new PhraseQuery();
            rightChild.Add(new Term(ALTFIELD, "w1"));
            rightChild.Add(new Term(ALTFIELD, "w3"));
            query.Add(rightChild, Occur.SHOULD);

            Qtest(query, new int[] { 1, 3 });
        }

        [Test]
        public virtual void TestMultiFieldBQofPQ3()
        {
            BooleanQuery query = new BooleanQuery();

            PhraseQuery leftChild = new PhraseQuery();
            leftChild.Slop = 1;
            leftChild.Add(new Term(FIELD, "w1"));
            leftChild.Add(new Term(FIELD, "w2"));
            query.Add(leftChild, Occur.SHOULD);

            PhraseQuery rightChild = new PhraseQuery();
            rightChild.Slop = 1;
            rightChild.Add(new Term(ALTFIELD, "w1"));
            rightChild.Add(new Term(ALTFIELD, "w2"));
            query.Add(rightChild, Occur.SHOULD);

            Qtest(query, new int[] { 0, 1, 2 });
        }

        [Test]
        public virtual void TestMultiFieldBQofPQ4()
        {
            BooleanQuery query = new BooleanQuery();

            PhraseQuery leftChild = new PhraseQuery();
            leftChild.Slop = 1;
            leftChild.Add(new Term(FIELD, "w2"));
            leftChild.Add(new Term(FIELD, "w3"));
            query.Add(leftChild, Occur.SHOULD);

            PhraseQuery rightChild = new PhraseQuery();
            rightChild.Slop = 1;
            rightChild.Add(new Term(ALTFIELD, "w2"));
            rightChild.Add(new Term(ALTFIELD, "w3"));
            query.Add(rightChild, Occur.SHOULD);

            Qtest(query, new int[] { 0, 1, 2, 3 });
        }

        [Test]
        public virtual void TestMultiFieldBQofPQ5()
        {
            BooleanQuery query = new BooleanQuery();

            PhraseQuery leftChild = new PhraseQuery();
            leftChild.Slop = 1;
            leftChild.Add(new Term(FIELD, "w3"));
            leftChild.Add(new Term(FIELD, "w2"));
            query.Add(leftChild, Occur.SHOULD);

            PhraseQuery rightChild = new PhraseQuery();
            rightChild.Slop = 1;
            rightChild.Add(new Term(ALTFIELD, "w3"));
            rightChild.Add(new Term(ALTFIELD, "w2"));
            query.Add(rightChild, Occur.SHOULD);

            Qtest(query, new int[] { 1, 3 });
        }

        [Test]
        public virtual void TestMultiFieldBQofPQ6()
        {
            BooleanQuery query = new BooleanQuery();

            PhraseQuery leftChild = new PhraseQuery();
            leftChild.Slop = 2;
            leftChild.Add(new Term(FIELD, "w3"));
            leftChild.Add(new Term(FIELD, "w2"));
            query.Add(leftChild, Occur.SHOULD);

            PhraseQuery rightChild = new PhraseQuery();
            rightChild.Slop = 2;
            rightChild.Add(new Term(ALTFIELD, "w3"));
            rightChild.Add(new Term(ALTFIELD, "w2"));
            query.Add(rightChild, Occur.SHOULD);

            Qtest(query, new int[] { 0, 1, 3 });
        }

        [Test]
        public virtual void TestMultiFieldBQofPQ7()
        {
            BooleanQuery query = new BooleanQuery();

            PhraseQuery leftChild = new PhraseQuery();
            leftChild.Slop = 3;
            leftChild.Add(new Term(FIELD, "w3"));
            leftChild.Add(new Term(FIELD, "w2"));
            query.Add(leftChild, Occur.SHOULD);

            PhraseQuery rightChild = new PhraseQuery();
            rightChild.Slop = 1;
            rightChild.Add(new Term(ALTFIELD, "w3"));
            rightChild.Add(new Term(ALTFIELD, "w2"));
            query.Add(rightChild, Occur.SHOULD);

            Qtest(query, new int[] { 0, 1, 2, 3 });
        }


        #region TestExplanations
        // LUCENENET NOTE: Tests in an abstract base class are not pulled into the correct
        // context in Visual Studio. This fixes that with the minimum amount of code necessary
        // to run them in the correct context without duplicating all of the tests.


        /// <summary>
        /// Placeholder: JUnit freaks if you don't have one test ... making
        /// class abstract doesn't help
        /// </summary>
        [Test]
        public override void TestNoop()
        {
            base.TestNoop();
        }

        #endregion
    }
}