src/Test/Index/TestDocumentWriter.cs - lucenenet - Git at Google

 /*
  * 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 System;

 using NUnit.Framework;

 using Document = Lucene.Net.Documents.Document;
 using Field = Lucene.Net.Documents.Field;
 using Fieldable = Lucene.Net.Documents.Fieldable;
 using TermVector = Lucene.Net.Documents.Field.TermVector;
 using RAMDirectory = Lucene.Net.Store.RAMDirectory;
 using LuceneTestCase = Lucene.Net.Util.LuceneTestCase;
 using Lucene.Net.Analysis;
 using StandardAnalyzer = Lucene.Net.Analysis.Standard.StandardAnalyzer;

 namespace Lucene.Net.Index
 {

 	[TestFixture]
 	public class TestDocumentWriter : LuceneTestCase
 	{
 		private class AnonymousClassAnalyzer : Analyzer
 		{
 			public AnonymousClassAnalyzer(TestDocumentWriter enclosingInstance)
 			{
 				InitBlock(enclosingInstance);
 			}
 			private void  InitBlock(TestDocumentWriter enclosingInstance)
 			{
 				this.enclosingInstance = enclosingInstance;
 			}
 			private TestDocumentWriter enclosingInstance;
 			public TestDocumentWriter Enclosing_Instance
 			{
 				get
 				{
 					return enclosingInstance;
 				}

 			}
 			public override TokenStream TokenStream(System.String fieldName, System.IO.TextReader reader)
 			{
 				return new WhitespaceTokenizer(reader);
 			}

 			public override int GetPositionIncrementGap(System.String fieldName)
 			{
 				return 500;
 			}
 		}

 		private class AnonymousClassAnalyzer1 : Analyzer
 		{
 			public AnonymousClassAnalyzer1(TestDocumentWriter enclosingInstance)
 			{
 				InitBlock(enclosingInstance);
 			}

 			private class AnonymousClassTokenFilter:TokenFilter
 			{
 				private void  InitBlock(AnonymousClassAnalyzer1 enclosingInstance)
 				{
 					this.enclosingInstance = enclosingInstance;
 				}
 				private AnonymousClassAnalyzer1 enclosingInstance;
 				public AnonymousClassAnalyzer1 Enclosing_Instance
 				{
 					get
 					{
 						return enclosingInstance;
 					}

 				}
 				internal AnonymousClassTokenFilter(AnonymousClassAnalyzer1 enclosingInstance, Lucene.Net.Analysis.TokenStream Param1):base(Param1)
 				{
 					InitBlock(enclosingInstance);
 				}
 				internal bool first = true;
 				internal Token buffered;

 				public override Token Next()
 				{
 					return input.Next();
 				}

 				public override Token Next(Token result)
 				{
 					if (buffered != null)
 					{
 						Token t = buffered;
 						buffered = null;
 						return t;
 					}
 					Token t2 = input.Next(result);
 					if (t2 == null)
 						return null;
 					if (System.Char.IsDigit(t2.TermBuffer()[0]))
 					{
 						t2.SetPositionIncrement(t2.TermBuffer()[0] - '0');
 					}
 					if (first)
 					{
 						// set payload on first position only
 						t2.SetPayload(new Payload(new byte[]{100}));
 						first = false;
 					}

 					// index a "synonym" for every token
 					buffered = (Token) t2.Clone();
 					buffered.SetPayload(null);
 					buffered.SetPositionIncrement(0);
 					buffered.SetTermBuffer(new char[]{'b'}, 0, 1);

 					return t2;
 				}
 			}
 			private void  InitBlock(TestDocumentWriter enclosingInstance)
 			{
 				this.enclosingInstance = enclosingInstance;
 			}
 			private TestDocumentWriter enclosingInstance;
 			public TestDocumentWriter Enclosing_Instance
 			{
 				get
 				{
 					return enclosingInstance;
 				}

 			}
 			public override TokenStream TokenStream(System.String fieldName, System.IO.TextReader reader)
 			{
 				return new AnonymousClassTokenFilter(this, new WhitespaceTokenizer(reader));
 			}
 		}

 		private class AnonymousClassTokenStream : TokenStream
 		{
 			public AnonymousClassTokenStream(TestDocumentWriter enclosingInstance)
 			{
 				InitBlock(enclosingInstance);
 			}
 			private void  InitBlock(TestDocumentWriter enclosingInstance)
 			{
 				this.enclosingInstance = enclosingInstance;
 			}
 			private TestDocumentWriter enclosingInstance;
 			public TestDocumentWriter Enclosing_Instance
 			{
 				get
 				{
 					return enclosingInstance;
 				}

 			}
 			private System.String[] tokens = new System.String[]{"term1", "term2", "term3", "term2"};
 			private int index = 0;

 			public override Token Next()
 			{
 				if (index == tokens.Length)
 				{
 					return null;
 				}
 				else
 				{
 					return new Token(tokens[index++], 0, 0);
 				}
 			}
 		}
 		private RAMDirectory dir;

 		[SetUp]
 		public override void  SetUp()
 		{
             base.SetUp();
 			dir = new RAMDirectory();
 		}

 		[Test]
 		public virtual void  Test()
 		{
 			Assert.IsTrue(dir != null);
 		}

 		[Test]
 		public virtual void  TestAddDocument()
 		{
 			Document testDoc = new Document();
 			DocHelper.SetupDoc(testDoc);
 			Analyzer analyzer = new WhitespaceAnalyzer();
 			IndexWriter writer = new IndexWriter(dir, analyzer, true);
 			writer.AddDocument(testDoc);
 			writer.Flush();
 			SegmentInfo info = writer.NewestSegment();
 			writer.Close();
 			//After adding the document, we should be able to read it back in
 			SegmentReader reader = SegmentReader.Get(info);
 			Assert.IsTrue(reader != null);
 			Document doc = reader.Document(0);
 			Assert.IsTrue(doc != null);

 			//System.out.println("Document: " + doc);
 			Fieldable[] fields = doc.GetFields("textField2");
 			Assert.IsTrue(fields != null && fields.Length == 1);
 			Assert.IsTrue(fields[0].StringValue().Equals(DocHelper.FIELD_2_TEXT));
 			Assert.IsTrue(fields[0].IsTermVectorStored());

 			fields = doc.GetFields("textField1");
 			Assert.IsTrue(fields != null && fields.Length == 1);
 			Assert.IsTrue(fields[0].StringValue().Equals(DocHelper.FIELD_1_TEXT));
 			Assert.IsFalse(fields[0].IsTermVectorStored());

 			fields = doc.GetFields("keyField");
 			Assert.IsTrue(fields != null && fields.Length == 1);
 			Assert.IsTrue(fields[0].StringValue().Equals(DocHelper.KEYWORD_TEXT));

 			fields = doc.GetFields(DocHelper.NO_NORMS_KEY);
 			Assert.IsTrue(fields != null && fields.Length == 1);
 			Assert.IsTrue(fields[0].StringValue().Equals(DocHelper.NO_NORMS_TEXT));

 			fields = doc.GetFields(DocHelper.TEXT_FIELD_3_KEY);
 			Assert.IsTrue(fields != null && fields.Length == 1);
 			Assert.IsTrue(fields[0].StringValue().Equals(DocHelper.FIELD_3_TEXT));

 			// test that the norms are not present in the segment if
 			// omitNorms is true
 			for (int i = 0; i < reader.FieldInfos().Size(); i++)
 			{
 				FieldInfo fi = reader.FieldInfos().FieldInfo(i);
 				if (fi.IsIndexed())
 				{
 					Assert.IsTrue(fi.omitNorms == !reader.HasNorms(fi.Name_ForNUnitTest));
 				}
 			}
 		}

 		[Test]
 		public virtual void  TestPositionIncrementGap()
 		{
 			Analyzer analyzer = new AnonymousClassAnalyzer(this);

 			IndexWriter writer = new IndexWriter(dir, analyzer, true);

 			Document doc = new Document();
 			doc.Add(new Field("repeated", "repeated one", Field.Store.YES, Field.Index.TOKENIZED));
 			doc.Add(new Field("repeated", "repeated two", Field.Store.YES, Field.Index.TOKENIZED));

 			writer.AddDocument(doc);
 			writer.Flush();
 			SegmentInfo info = writer.NewestSegment();
 			writer.Close();
 			SegmentReader reader = SegmentReader.Get(info);

 			TermPositions termPositions = reader.TermPositions(new Term("repeated", "repeated"));
 			Assert.IsTrue(termPositions.Next());
 			int freq = termPositions.Freq();
 			Assert.AreEqual(2, freq);
 			Assert.AreEqual(0, termPositions.NextPosition());
 			Assert.AreEqual(502, termPositions.NextPosition());
 		}

 		[Test]
 		public virtual void  TestTokenReuse()
 		{
 			Analyzer analyzer = new AnonymousClassAnalyzer1(this);

 			IndexWriter writer = new IndexWriter(dir, analyzer, true);

 			Document doc = new Document();
 			doc.Add(new Field("f1", "a 5 a a", Field.Store.YES, Field.Index.TOKENIZED));

 			writer.AddDocument(doc);
 			writer.Flush();
 			SegmentInfo info = writer.NewestSegment();
 			writer.Close();
 			SegmentReader reader = SegmentReader.Get(info);

 			TermPositions termPositions = reader.TermPositions(new Term("f1", "a"));
 			Assert.IsTrue(termPositions.Next());
 			int freq = termPositions.Freq();
 			Assert.AreEqual(3, freq);
 			Assert.AreEqual(0, termPositions.NextPosition());
 			Assert.AreEqual(true, termPositions.IsPayloadAvailable());
 			Assert.AreEqual(6, termPositions.NextPosition());
 			Assert.AreEqual(false, termPositions.IsPayloadAvailable());
 			Assert.AreEqual(7, termPositions.NextPosition());
 			Assert.AreEqual(false, termPositions.IsPayloadAvailable());
 		}


 		[Test]
 		public virtual void  TestPreAnalyzedField()
 		{
 			IndexWriter writer = new IndexWriter(dir, new SimpleAnalyzer(), true);
 			Document doc = new Document();

 			doc.Add(new Field("preanalyzed", new AnonymousClassTokenStream(this), TermVector.NO));

 			writer.AddDocument(doc);
 			writer.Flush();
 			SegmentInfo info = writer.NewestSegment();
 			writer.Close();
 			SegmentReader reader = SegmentReader.Get(info);

 			TermPositions termPositions = reader.TermPositions(new Term("preanalyzed", "term1"));
 			Assert.IsTrue(termPositions.Next());
 			Assert.AreEqual(1, termPositions.Freq());
 			Assert.AreEqual(0, termPositions.NextPosition());

 			termPositions.Seek(new Term("preanalyzed", "term2"));
 			Assert.IsTrue(termPositions.Next());
 			Assert.AreEqual(2, termPositions.Freq());
 			Assert.AreEqual(1, termPositions.NextPosition());
 			Assert.AreEqual(3, termPositions.NextPosition());

 			termPositions.Seek(new Term("preanalyzed", "term3"));
 			Assert.IsTrue(termPositions.Next());
 			Assert.AreEqual(1, termPositions.Freq());
 			Assert.AreEqual(2, termPositions.NextPosition());
 		}

 		/// <summary> Test adding two fields with the same name, but
 		/// with different term vector setting (LUCENE-766).
 		/// </summary>
 		[Test]
 		public virtual void  TestMixedTermVectorSettingsSameField()
 		{
 			Document doc = new Document();
 			// f1 first without tv then with tv
 			doc.Add(new Field("f1", "v1", Field.Store.YES, Field.Index.UN_TOKENIZED, TermVector.NO));
 			doc.Add(new Field("f1", "v2", Field.Store.YES, Field.Index.UN_TOKENIZED, TermVector.WITH_POSITIONS_OFFSETS));
 			// f2 first with tv then without tv
 			doc.Add(new Field("f2", "v1", Field.Store.YES, Field.Index.UN_TOKENIZED, TermVector.WITH_POSITIONS_OFFSETS));
 			doc.Add(new Field("f2", "v2", Field.Store.YES, Field.Index.UN_TOKENIZED, TermVector.NO));

 			RAMDirectory ram = new RAMDirectory();
 			IndexWriter writer = new IndexWriter(ram, new StandardAnalyzer(), true);
 			writer.AddDocument(doc);
 			writer.Close();

 			IndexReader reader = IndexReader.Open(ram);
 			// f1
 			TermFreqVector tfv1 = reader.GetTermFreqVector(0, "f1");
 			Assert.IsNotNull(tfv1);
 			Assert.AreEqual(2, tfv1.GetTerms().Length, "the 'with_tv' setting should rule!");
 			// f2
 			TermFreqVector tfv2 = reader.GetTermFreqVector(0, "f2");
 			Assert.IsNotNull(tfv2);
 			Assert.AreEqual(2, tfv2.GetTerms().Length, "the 'with_tv' setting should rule!");
 		}
 	}
 }
	/*
	* 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 System;

	using NUnit.Framework;

	using Document = Lucene.Net.Documents.Document;
	using Field = Lucene.Net.Documents.Field;
	using Fieldable = Lucene.Net.Documents.Fieldable;
	using TermVector = Lucene.Net.Documents.Field.TermVector;
	using RAMDirectory = Lucene.Net.Store.RAMDirectory;
	using LuceneTestCase = Lucene.Net.Util.LuceneTestCase;
	using Lucene.Net.Analysis;
	using StandardAnalyzer = Lucene.Net.Analysis.Standard.StandardAnalyzer;

	namespace Lucene.Net.Index
	{

	[TestFixture]
	public class TestDocumentWriter : LuceneTestCase
	{
	private class AnonymousClassAnalyzer : Analyzer
	{
	public AnonymousClassAnalyzer(TestDocumentWriter enclosingInstance)
	{
	InitBlock(enclosingInstance);
	}
	private void InitBlock(TestDocumentWriter enclosingInstance)
	{
	this.enclosingInstance = enclosingInstance;
	}
	private TestDocumentWriter enclosingInstance;
	public TestDocumentWriter Enclosing_Instance
	{
	get
	{
	return enclosingInstance;
	}

	}
	public override TokenStream TokenStream(System.String fieldName, System.IO.TextReader reader)
	{
	return new WhitespaceTokenizer(reader);
	}

	public override int GetPositionIncrementGap(System.String fieldName)
	{
	return 500;
	}
	}

	private class AnonymousClassAnalyzer1 : Analyzer
	{
	public AnonymousClassAnalyzer1(TestDocumentWriter enclosingInstance)
	{
	InitBlock(enclosingInstance);
	}

	private class AnonymousClassTokenFilter:TokenFilter
	{
	private void InitBlock(AnonymousClassAnalyzer1 enclosingInstance)
	{
	this.enclosingInstance = enclosingInstance;
	}
	private AnonymousClassAnalyzer1 enclosingInstance;
	public AnonymousClassAnalyzer1 Enclosing_Instance
	{
	get
	{
	return enclosingInstance;
	}

	}
	internal AnonymousClassTokenFilter(AnonymousClassAnalyzer1 enclosingInstance, Lucene.Net.Analysis.TokenStream Param1):base(Param1)
	{
	InitBlock(enclosingInstance);
	}
	internal bool first = true;
	internal Token buffered;

	public override Token Next()
	{
	return input.Next();
	}

	public override Token Next(Token result)
	{
	if (buffered != null)
	{
	Token t = buffered;
	buffered = null;
	return t;
	}
	Token t2 = input.Next(result);
	if (t2 == null)
	return null;
	if (System.Char.IsDigit(t2.TermBuffer()[0]))
	{
	t2.SetPositionIncrement(t2.TermBuffer()[0] - '0');
	}
	if (first)
	{
	// set payload on first position only
	t2.SetPayload(new Payload(new byte[]{100}));
	first = false;
	}

	// index a "synonym" for every token
	buffered = (Token) t2.Clone();
	buffered.SetPayload(null);
	buffered.SetPositionIncrement(0);
	buffered.SetTermBuffer(new char[]{'b'}, 0, 1);

	return t2;
	}
	}
	private void InitBlock(TestDocumentWriter enclosingInstance)
	{
	this.enclosingInstance = enclosingInstance;
	}
	private TestDocumentWriter enclosingInstance;
	public TestDocumentWriter Enclosing_Instance
	{
	get
	{
	return enclosingInstance;
	}

	}
	public override TokenStream TokenStream(System.String fieldName, System.IO.TextReader reader)
	{
	return new AnonymousClassTokenFilter(this, new WhitespaceTokenizer(reader));
	}
	}

	private class AnonymousClassTokenStream : TokenStream
	{
	public AnonymousClassTokenStream(TestDocumentWriter enclosingInstance)
	{
	InitBlock(enclosingInstance);
	}
	private void InitBlock(TestDocumentWriter enclosingInstance)
	{
	this.enclosingInstance = enclosingInstance;
	}
	private TestDocumentWriter enclosingInstance;
	public TestDocumentWriter Enclosing_Instance
	{
	get
	{
	return enclosingInstance;
	}

	}
	private System.String[] tokens = new System.String[]{"term1", "term2", "term3", "term2"};
	private int index = 0;

	public override Token Next()
	{
	if (index == tokens.Length)
	{
	return null;
	}
	else
	{
	return new Token(tokens[index++], 0, 0);
	}
	}
	}
	private RAMDirectory dir;

	[SetUp]
	public override void SetUp()
	{
	base.SetUp();
	dir = new RAMDirectory();
	}

	[Test]
	public virtual void Test()
	{
	Assert.IsTrue(dir != null);
	}

	[Test]
	public virtual void TestAddDocument()
	{
	Document testDoc = new Document();
	DocHelper.SetupDoc(testDoc);
	Analyzer analyzer = new WhitespaceAnalyzer();
	IndexWriter writer = new IndexWriter(dir, analyzer, true);
	writer.AddDocument(testDoc);
	writer.Flush();
	SegmentInfo info = writer.NewestSegment();
	writer.Close();
	//After adding the document, we should be able to read it back in
	SegmentReader reader = SegmentReader.Get(info);
	Assert.IsTrue(reader != null);
	Document doc = reader.Document(0);
	Assert.IsTrue(doc != null);

	//System.out.println("Document: " + doc);
	Fieldable[] fields = doc.GetFields("textField2");
	Assert.IsTrue(fields != null && fields.Length == 1);
	Assert.IsTrue(fields[0].StringValue().Equals(DocHelper.FIELD_2_TEXT));
	Assert.IsTrue(fields[0].IsTermVectorStored());

	fields = doc.GetFields("textField1");
	Assert.IsTrue(fields != null && fields.Length == 1);
	Assert.IsTrue(fields[0].StringValue().Equals(DocHelper.FIELD_1_TEXT));
	Assert.IsFalse(fields[0].IsTermVectorStored());

	fields = doc.GetFields("keyField");
	Assert.IsTrue(fields != null && fields.Length == 1);
	Assert.IsTrue(fields[0].StringValue().Equals(DocHelper.KEYWORD_TEXT));

	fields = doc.GetFields(DocHelper.NO_NORMS_KEY);
	Assert.IsTrue(fields != null && fields.Length == 1);
	Assert.IsTrue(fields[0].StringValue().Equals(DocHelper.NO_NORMS_TEXT));

	fields = doc.GetFields(DocHelper.TEXT_FIELD_3_KEY);
	Assert.IsTrue(fields != null && fields.Length == 1);
	Assert.IsTrue(fields[0].StringValue().Equals(DocHelper.FIELD_3_TEXT));

	// test that the norms are not present in the segment if
	// omitNorms is true
	for (int i = 0; i < reader.FieldInfos().Size(); i++)
	{
	FieldInfo fi = reader.FieldInfos().FieldInfo(i);
	if (fi.IsIndexed())
	{
	Assert.IsTrue(fi.omitNorms == !reader.HasNorms(fi.Name_ForNUnitTest));
	}
	}
	}

	[Test]
	public virtual void TestPositionIncrementGap()
	{
	Analyzer analyzer = new AnonymousClassAnalyzer(this);

	IndexWriter writer = new IndexWriter(dir, analyzer, true);

	Document doc = new Document();
	doc.Add(new Field("repeated", "repeated one", Field.Store.YES, Field.Index.TOKENIZED));
	doc.Add(new Field("repeated", "repeated two", Field.Store.YES, Field.Index.TOKENIZED));

	writer.AddDocument(doc);
	writer.Flush();
	SegmentInfo info = writer.NewestSegment();
	writer.Close();
	SegmentReader reader = SegmentReader.Get(info);

	TermPositions termPositions = reader.TermPositions(new Term("repeated", "repeated"));
	Assert.IsTrue(termPositions.Next());
	int freq = termPositions.Freq();
	Assert.AreEqual(2, freq);
	Assert.AreEqual(0, termPositions.NextPosition());
	Assert.AreEqual(502, termPositions.NextPosition());
	}

	[Test]
	public virtual void TestTokenReuse()
	{
	Analyzer analyzer = new AnonymousClassAnalyzer1(this);

	IndexWriter writer = new IndexWriter(dir, analyzer, true);

	Document doc = new Document();
	doc.Add(new Field("f1", "a 5 a a", Field.Store.YES, Field.Index.TOKENIZED));

	writer.AddDocument(doc);
	writer.Flush();
	SegmentInfo info = writer.NewestSegment();
	writer.Close();
	SegmentReader reader = SegmentReader.Get(info);

	TermPositions termPositions = reader.TermPositions(new Term("f1", "a"));
	Assert.IsTrue(termPositions.Next());
	int freq = termPositions.Freq();
	Assert.AreEqual(3, freq);
	Assert.AreEqual(0, termPositions.NextPosition());
	Assert.AreEqual(true, termPositions.IsPayloadAvailable());
	Assert.AreEqual(6, termPositions.NextPosition());
	Assert.AreEqual(false, termPositions.IsPayloadAvailable());
	Assert.AreEqual(7, termPositions.NextPosition());
	Assert.AreEqual(false, termPositions.IsPayloadAvailable());
	}


	[Test]
	public virtual void TestPreAnalyzedField()
	{
	IndexWriter writer = new IndexWriter(dir, new SimpleAnalyzer(), true);
	Document doc = new Document();

	doc.Add(new Field("preanalyzed", new AnonymousClassTokenStream(this), TermVector.NO));

	writer.AddDocument(doc);
	writer.Flush();
	SegmentInfo info = writer.NewestSegment();
	writer.Close();
	SegmentReader reader = SegmentReader.Get(info);

	TermPositions termPositions = reader.TermPositions(new Term("preanalyzed", "term1"));
	Assert.IsTrue(termPositions.Next());
	Assert.AreEqual(1, termPositions.Freq());
	Assert.AreEqual(0, termPositions.NextPosition());

	termPositions.Seek(new Term("preanalyzed", "term2"));
	Assert.IsTrue(termPositions.Next());
	Assert.AreEqual(2, termPositions.Freq());
	Assert.AreEqual(1, termPositions.NextPosition());
	Assert.AreEqual(3, termPositions.NextPosition());

	termPositions.Seek(new Term("preanalyzed", "term3"));
	Assert.IsTrue(termPositions.Next());
	Assert.AreEqual(1, termPositions.Freq());
	Assert.AreEqual(2, termPositions.NextPosition());
	}

	/// <summary> Test adding two fields with the same name, but
	/// with different term vector setting (LUCENE-766).
	/// </summary>
	[Test]
	public virtual void TestMixedTermVectorSettingsSameField()
	{
	Document doc = new Document();
	// f1 first without tv then with tv
	doc.Add(new Field("f1", "v1", Field.Store.YES, Field.Index.UN_TOKENIZED, TermVector.NO));
	doc.Add(new Field("f1", "v2", Field.Store.YES, Field.Index.UN_TOKENIZED, TermVector.WITH_POSITIONS_OFFSETS));
	// f2 first with tv then without tv
	doc.Add(new Field("f2", "v1", Field.Store.YES, Field.Index.UN_TOKENIZED, TermVector.WITH_POSITIONS_OFFSETS));
	doc.Add(new Field("f2", "v2", Field.Store.YES, Field.Index.UN_TOKENIZED, TermVector.NO));

	RAMDirectory ram = new RAMDirectory();
	IndexWriter writer = new IndexWriter(ram, new StandardAnalyzer(), true);
	writer.AddDocument(doc);
	writer.Close();

	IndexReader reader = IndexReader.Open(ram);
	// f1
	TermFreqVector tfv1 = reader.GetTermFreqVector(0, "f1");
	Assert.IsNotNull(tfv1);
	Assert.AreEqual(2, tfv1.GetTerms().Length, "the 'with_tv' setting should rule!");
	// f2
	TermFreqVector tfv2 = reader.GetTermFreqVector(0, "f2");
	Assert.IsNotNull(tfv2);
	Assert.AreEqual(2, tfv2.GetTerms().Length, "the 'with_tv' setting should rule!");
	}
	}
	}