lucene/test-framework/src/java/org/apache/lucene/index/BaseFieldInfoFormatTestCase.java - lucene-solr - 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.
  */
 package org.apache.lucene.index;

 import java.io.IOException;
 import java.util.Collections;
 import java.util.HashSet;
 import java.util.Map;
 import java.util.Random;
 import java.util.Set;

 import org.apache.lucene.codecs.Codec;
 import org.apache.lucene.document.Document;
 import org.apache.lucene.document.FieldType;
 import org.apache.lucene.document.StoredField;
 import org.apache.lucene.document.TextField;
 import org.apache.lucene.store.Directory;
 import org.apache.lucene.store.IOContext;
 import org.apache.lucene.store.MockDirectoryWrapper;
 import org.apache.lucene.store.MockDirectoryWrapper.Failure;
 import org.apache.lucene.store.MockDirectoryWrapper.FakeIOException;
 import org.apache.lucene.util.StringHelper;
 import org.apache.lucene.util.TestUtil;
 import org.apache.lucene.util.Version;

 /**
  * Abstract class to do basic tests for fis format.
  * NOTE: This test focuses on the fis impl, nothing else.
  * The [stretch] goal is for this test to be
  * so thorough in testing a new fis format that if this
  * test passes, then all Lucene/Solr tests should also pass.  Ie,
  * if there is some bug in a given fis Format that this
  * test fails to catch then this test needs to be improved! */
 public abstract class BaseFieldInfoFormatTestCase extends BaseIndexFileFormatTestCase {

   /** Test field infos read/write with a single field */
   public void testOneField() throws Exception {
     Directory dir = newDirectory();
     Codec codec = getCodec();
     SegmentInfo segmentInfo = newSegmentInfo(dir, "_123");
     FieldInfos.Builder builder = new FieldInfos.Builder(new FieldInfos.FieldNumbers(null));
     FieldInfo fi = builder.getOrAdd("field");
     fi.setIndexOptions(TextField.TYPE_STORED.indexOptions());
     addAttributes(fi);
     FieldInfos infos = builder.finish();
     codec.fieldInfosFormat().write(dir, segmentInfo, "", infos, IOContext.DEFAULT);
     FieldInfos infos2 = codec.fieldInfosFormat().read(dir, segmentInfo, "", IOContext.DEFAULT);
     assertEquals(1, infos2.size());
     assertNotNull(infos2.fieldInfo("field"));
     assertTrue(infos2.fieldInfo("field").getIndexOptions() != IndexOptions.NONE);
     assertFalse(infos2.fieldInfo("field").getDocValuesType() != DocValuesType.NONE);
     assertFalse(infos2.fieldInfo("field").omitsNorms());
     assertFalse(infos2.fieldInfo("field").hasPayloads());
     assertFalse(infos2.fieldInfo("field").hasVectors());
     assertEquals(0, infos2.fieldInfo("field").getPointDimensionCount());
     assertFalse(infos2.fieldInfo("field").isSoftDeletesField());
     dir.close();
   }

   /** Test field infos attributes coming back are not mutable */
   public void testImmutableAttributes() throws Exception {
     Directory dir = newDirectory();
     Codec codec = getCodec();
     SegmentInfo segmentInfo = newSegmentInfo(dir, "_123");
     FieldInfos.Builder builder = new FieldInfos.Builder(new FieldInfos.FieldNumbers(null));
     FieldInfo fi = builder.getOrAdd("field");
     fi.setIndexOptions(TextField.TYPE_STORED.indexOptions());
     addAttributes(fi);
     fi.putAttribute("foo", "bar");
     fi.putAttribute("bar", "baz");
     FieldInfos infos = builder.finish();
     codec.fieldInfosFormat().write(dir, segmentInfo, "", infos, IOContext.DEFAULT);
     FieldInfos infos2 = codec.fieldInfosFormat().read(dir, segmentInfo, "", IOContext.DEFAULT);
     assertEquals(1, infos2.size());
     assertNotNull(infos2.fieldInfo("field"));
     Map<String,String> attributes = infos2.fieldInfo("field").attributes();
     // shouldn't be able to modify attributes
     expectThrows(UnsupportedOperationException.class, () -> {
       attributes.put("bogus", "bogus");
     });

     dir.close();
   }

   /**
    * Test field infos write that hits exception immediately on open.
    * make sure we get our exception back, no file handle leaks, etc.
    */
   public void testExceptionOnCreateOutput() throws Exception {
     Failure fail = new Failure() {
       @Override
       public void eval(MockDirectoryWrapper dir) throws IOException {
         if (doFail && callStackContainsAnyOf("createOutput")) {
           throw new FakeIOException();
         }
       }
     };

     MockDirectoryWrapper dir = newMockDirectory();
     dir.failOn(fail);
     Codec codec = getCodec();
     SegmentInfo segmentInfo = newSegmentInfo(dir, "_123");
     FieldInfos.Builder builder = new FieldInfos.Builder(new FieldInfos.FieldNumbers(null));
     FieldInfo fi = builder.getOrAdd("field");
     fi.setIndexOptions(TextField.TYPE_STORED.indexOptions());
     addAttributes(fi);
     FieldInfos infos = builder.finish();

     fail.setDoFail();
     expectThrows(FakeIOException.class, () -> {
       codec.fieldInfosFormat().write(dir, segmentInfo, "", infos, IOContext.DEFAULT);
     });
     fail.clearDoFail();

     dir.close();
   }

   /**
    * Test field infos write that hits exception on close.
    * make sure we get our exception back, no file handle leaks, etc.
    */
   public void testExceptionOnCloseOutput() throws Exception {
     Failure fail = new Failure() {
       @Override
       public void eval(MockDirectoryWrapper dir) throws IOException {
         if (doFail && callStackContainsAnyOf("close")) {
           throw new FakeIOException();
         }
       }
     };

     MockDirectoryWrapper dir = newMockDirectory();
     dir.failOn(fail);
     Codec codec = getCodec();
     SegmentInfo segmentInfo = newSegmentInfo(dir, "_123");
     FieldInfos.Builder builder = new FieldInfos.Builder(new FieldInfos.FieldNumbers(null));
     FieldInfo fi = builder.getOrAdd("field");
     fi.setIndexOptions(TextField.TYPE_STORED.indexOptions());
     addAttributes(fi);
     FieldInfos infos = builder.finish();

     fail.setDoFail();
     expectThrows(FakeIOException.class, () -> {
       codec.fieldInfosFormat().write(dir, segmentInfo, "", infos, IOContext.DEFAULT);
     });
     fail.clearDoFail();

     dir.close();
   }

   /**
    * Test field infos read that hits exception immediately on open.
    * make sure we get our exception back, no file handle leaks, etc.
    */
   public void testExceptionOnOpenInput() throws Exception {
     Failure fail = new Failure() {
       @Override
       public void eval(MockDirectoryWrapper dir) throws IOException {
         if (doFail && callStackContainsAnyOf("openInput")) {
           throw new FakeIOException();
         }
       }
     };

     MockDirectoryWrapper dir = newMockDirectory();
     dir.failOn(fail);
     Codec codec = getCodec();
     SegmentInfo segmentInfo = newSegmentInfo(dir, "_123");
     FieldInfos.Builder builder = new FieldInfos.Builder(new FieldInfos.FieldNumbers(null));
     FieldInfo fi = builder.getOrAdd("field");
     fi.setIndexOptions(TextField.TYPE_STORED.indexOptions());
     addAttributes(fi);
     FieldInfos infos = builder.finish();
     codec.fieldInfosFormat().write(dir, segmentInfo, "", infos, IOContext.DEFAULT);

     fail.setDoFail();
     expectThrows(FakeIOException.class, () -> {
       codec.fieldInfosFormat().read(dir, segmentInfo, "", IOContext.DEFAULT);
     });
     fail.clearDoFail();

     dir.close();
   }

   /**
    * Test field infos read that hits exception on close.
    * make sure we get our exception back, no file handle leaks, etc.
    */
   public void testExceptionOnCloseInput() throws Exception {
     Failure fail = new Failure() {
       @Override
       public void eval(MockDirectoryWrapper dir) throws IOException {
         if (doFail && callStackContainsAnyOf("close")) {
           throw new FakeIOException();
         }
       }
     };

     MockDirectoryWrapper dir = newMockDirectory();
     dir.failOn(fail);
     Codec codec = getCodec();
     SegmentInfo segmentInfo = newSegmentInfo(dir, "_123");
     FieldInfos.Builder builder = new FieldInfos.Builder(new FieldInfos.FieldNumbers(null));
     FieldInfo fi = builder.getOrAdd("field");
     fi.setIndexOptions(TextField.TYPE_STORED.indexOptions());
     addAttributes(fi);
     FieldInfos infos = builder.finish();
     codec.fieldInfosFormat().write(dir, segmentInfo, "", infos, IOContext.DEFAULT);

     fail.setDoFail();
     expectThrows(FakeIOException.class, () -> {
       codec.fieldInfosFormat().read(dir, segmentInfo, "", IOContext.DEFAULT);
     });
     fail.clearDoFail();

     dir.close();
   }

   // TODO: more tests

   /** Test field infos read/write with random fields, with different values. */
   public void testRandom() throws Exception {
     Directory dir = newDirectory();
     Codec codec = getCodec();
     SegmentInfo segmentInfo = newSegmentInfo(dir, "_123");

     // generate a bunch of fields
     int numFields = atLeast(2000);
     Set<String> fieldNames = new HashSet<>();
     for (int i = 0; i < numFields; i++) {
       fieldNames.add(TestUtil.randomUnicodeString(random()));
     }

     String softDeletesField =
         random().nextBoolean() ? TestUtil.randomUnicodeString(random()) : null;
     FieldInfos.Builder builder =
         new FieldInfos.Builder(new FieldInfos.FieldNumbers(softDeletesField));

     for (String field : fieldNames) {
       IndexableFieldType fieldType = randomFieldType(random());
       FieldInfo fi = builder.getOrAdd(field);
       IndexOptions indexOptions = fieldType.indexOptions();
       if (indexOptions != IndexOptions.NONE) {
         fi.setIndexOptions(indexOptions);
         if (fieldType.omitNorms()) {
           fi.setOmitsNorms();
         }
       }
       fi.setDocValuesType(fieldType.docValuesType());
       if (fieldType.indexOptions() != IndexOptions.NONE && fieldType.indexOptions().compareTo(IndexOptions.DOCS_AND_FREQS_AND_POSITIONS) >= 0) {
         if (random().nextBoolean()) {
           fi.setStorePayloads();
         }
       }

       if (fieldType.pointDimensionCount() > 0) {
         fi.setPointDimensions(
             fieldType.pointDimensionCount(),
             fieldType.pointIndexDimensionCount(),
             fieldType.pointNumBytes());
       }

       addAttributes(fi);
     }
     FieldInfos infos = builder.finish();
     codec.fieldInfosFormat().write(dir, segmentInfo, "", infos, IOContext.DEFAULT);
     FieldInfos infos2 = codec.fieldInfosFormat().read(dir, segmentInfo, "", IOContext.DEFAULT);
     assertEquals(infos, infos2);
     dir.close();
   }

   private final IndexableFieldType randomFieldType(Random r) {
     FieldType type = new FieldType();

     if (r.nextBoolean()) {
       IndexOptions[] values = IndexOptions.values();
       type.setIndexOptions(values[r.nextInt(values.length)]);
       type.setOmitNorms(r.nextBoolean());

       if (r.nextBoolean()) {
         type.setStoreTermVectors(true);
         if (type.indexOptions().compareTo(IndexOptions.DOCS_AND_FREQS_AND_POSITIONS) >= 0) {
           type.setStoreTermVectorPositions(r.nextBoolean());
           type.setStoreTermVectorOffsets(r.nextBoolean());
           if (type.storeTermVectorPositions()) {
             type.setStoreTermVectorPayloads(r.nextBoolean());
           }
         }
       }
     }

     if (r.nextBoolean()) {
       DocValuesType[] values = DocValuesType.values();
       type.setDocValuesType(values[r.nextInt(values.length)]);
     }

     if (r.nextBoolean()) {
       int dimension = 1 + r.nextInt(PointValues.MAX_DIMENSIONS);
       int indexDimension = 1 + r.nextInt(Math.min(dimension, PointValues.MAX_INDEX_DIMENSIONS));
       int dimensionNumBytes = 1 + r.nextInt(PointValues.MAX_NUM_BYTES);
       type.setDimensions(dimension, indexDimension, dimensionNumBytes);
     }

     return type;
   }

   /** Hook to add any codec attributes to fieldinfo instances added in this test. */
   protected void addAttributes(FieldInfo fi) {}

   /** equality for entirety of fieldinfos */
   protected void assertEquals(FieldInfos expected, FieldInfos actual) {
     assertEquals(expected.size(), actual.size());
     for (FieldInfo expectedField : expected) {
       FieldInfo actualField = actual.fieldInfo(expectedField.number);
       assertNotNull(actualField);
       assertEquals(expectedField, actualField);
     }
   }

   /** equality for two individual fieldinfo objects */
   protected void assertEquals(FieldInfo expected, FieldInfo actual) {
     assertEquals(expected.number, actual.number);
     assertEquals(expected.name, actual.name);
     assertEquals(expected.getDocValuesType(), actual.getDocValuesType());
     assertEquals(expected.getIndexOptions(), actual.getIndexOptions());
     assertEquals(expected.hasNorms(), actual.hasNorms());
     assertEquals(expected.hasPayloads(), actual.hasPayloads());
     assertEquals(expected.hasVectors(), actual.hasVectors());
     assertEquals(expected.omitsNorms(), actual.omitsNorms());
     assertEquals(expected.getDocValuesGen(), actual.getDocValuesGen());
   }

   /** Returns a new fake segment */
   protected static SegmentInfo newSegmentInfo(Directory dir, String name) {
     Version minVersion = random().nextBoolean() ? null : Version.LATEST;
     return new SegmentInfo(dir, Version.LATEST, minVersion, name, 10000, false, Codec.getDefault(), Collections.emptyMap(), StringHelper.randomId(), Collections.emptyMap(), null);
   }

   @Override
   protected void addRandomFields(Document doc) {
     doc.add(new StoredField("foobar", TestUtil.randomSimpleString(random())));
   }

   @Override
   public void testRamBytesUsed() throws IOException {
     assumeTrue("not applicable for this format", true);
   }
 }
	/*
	* 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.
	*/
	package org.apache.lucene.index;

	import java.io.IOException;
	import java.util.Collections;
	import java.util.HashSet;
	import java.util.Map;
	import java.util.Random;
	import java.util.Set;

	import org.apache.lucene.codecs.Codec;
	import org.apache.lucene.document.Document;
	import org.apache.lucene.document.FieldType;
	import org.apache.lucene.document.StoredField;
	import org.apache.lucene.document.TextField;
	import org.apache.lucene.store.Directory;
	import org.apache.lucene.store.IOContext;
	import org.apache.lucene.store.MockDirectoryWrapper;
	import org.apache.lucene.store.MockDirectoryWrapper.Failure;
	import org.apache.lucene.store.MockDirectoryWrapper.FakeIOException;
	import org.apache.lucene.util.StringHelper;
	import org.apache.lucene.util.TestUtil;
	import org.apache.lucene.util.Version;

	/**
	* Abstract class to do basic tests for fis format.
	* NOTE: This test focuses on the fis impl, nothing else.
	* The [stretch] goal is for this test to be
	* so thorough in testing a new fis format that if this
	* test passes, then all Lucene/Solr tests should also pass. Ie,
	* if there is some bug in a given fis Format that this
	* test fails to catch then this test needs to be improved! */
	public abstract class BaseFieldInfoFormatTestCase extends BaseIndexFileFormatTestCase {

	/** Test field infos read/write with a single field */
	public void testOneField() throws Exception {
	Directory dir = newDirectory();
	Codec codec = getCodec();
	SegmentInfo segmentInfo = newSegmentInfo(dir, "_123");
	FieldInfos.Builder builder = new FieldInfos.Builder(new FieldInfos.FieldNumbers(null));
	FieldInfo fi = builder.getOrAdd("field");
	fi.setIndexOptions(TextField.TYPE_STORED.indexOptions());
	addAttributes(fi);
	FieldInfos infos = builder.finish();
	codec.fieldInfosFormat().write(dir, segmentInfo, "", infos, IOContext.DEFAULT);
	FieldInfos infos2 = codec.fieldInfosFormat().read(dir, segmentInfo, "", IOContext.DEFAULT);
	assertEquals(1, infos2.size());
	assertNotNull(infos2.fieldInfo("field"));
	assertTrue(infos2.fieldInfo("field").getIndexOptions() != IndexOptions.NONE);
	assertFalse(infos2.fieldInfo("field").getDocValuesType() != DocValuesType.NONE);
	assertFalse(infos2.fieldInfo("field").omitsNorms());
	assertFalse(infos2.fieldInfo("field").hasPayloads());
	assertFalse(infos2.fieldInfo("field").hasVectors());
	assertEquals(0, infos2.fieldInfo("field").getPointDimensionCount());
	assertFalse(infos2.fieldInfo("field").isSoftDeletesField());
	dir.close();
	}

	/** Test field infos attributes coming back are not mutable */
	public void testImmutableAttributes() throws Exception {
	Directory dir = newDirectory();
	Codec codec = getCodec();
	SegmentInfo segmentInfo = newSegmentInfo(dir, "_123");
	FieldInfos.Builder builder = new FieldInfos.Builder(new FieldInfos.FieldNumbers(null));
	FieldInfo fi = builder.getOrAdd("field");
	fi.setIndexOptions(TextField.TYPE_STORED.indexOptions());
	addAttributes(fi);
	fi.putAttribute("foo", "bar");
	fi.putAttribute("bar", "baz");
	FieldInfos infos = builder.finish();
	codec.fieldInfosFormat().write(dir, segmentInfo, "", infos, IOContext.DEFAULT);
	FieldInfos infos2 = codec.fieldInfosFormat().read(dir, segmentInfo, "", IOContext.DEFAULT);
	assertEquals(1, infos2.size());
	assertNotNull(infos2.fieldInfo("field"));
	Map<String,String> attributes = infos2.fieldInfo("field").attributes();
	// shouldn't be able to modify attributes
	expectThrows(UnsupportedOperationException.class, () -> {
	attributes.put("bogus", "bogus");
	});

	dir.close();
	}

	/**
	* Test field infos write that hits exception immediately on open.
	* make sure we get our exception back, no file handle leaks, etc.
	*/
	public void testExceptionOnCreateOutput() throws Exception {
	Failure fail = new Failure() {
	@Override
	public void eval(MockDirectoryWrapper dir) throws IOException {
	if (doFail && callStackContainsAnyOf("createOutput")) {
	throw new FakeIOException();
	}
	}
	};

	MockDirectoryWrapper dir = newMockDirectory();
	dir.failOn(fail);
	Codec codec = getCodec();
	SegmentInfo segmentInfo = newSegmentInfo(dir, "_123");
	FieldInfos.Builder builder = new FieldInfos.Builder(new FieldInfos.FieldNumbers(null));
	FieldInfo fi = builder.getOrAdd("field");
	fi.setIndexOptions(TextField.TYPE_STORED.indexOptions());
	addAttributes(fi);
	FieldInfos infos = builder.finish();

	fail.setDoFail();
	expectThrows(FakeIOException.class, () -> {
	codec.fieldInfosFormat().write(dir, segmentInfo, "", infos, IOContext.DEFAULT);
	});
	fail.clearDoFail();

	dir.close();
	}

	/**
	* Test field infos write that hits exception on close.
	* make sure we get our exception back, no file handle leaks, etc.
	*/
	public void testExceptionOnCloseOutput() throws Exception {
	Failure fail = new Failure() {
	@Override
	public void eval(MockDirectoryWrapper dir) throws IOException {
	if (doFail && callStackContainsAnyOf("close")) {
	throw new FakeIOException();
	}
	}
	};

	MockDirectoryWrapper dir = newMockDirectory();
	dir.failOn(fail);
	Codec codec = getCodec();
	SegmentInfo segmentInfo = newSegmentInfo(dir, "_123");
	FieldInfos.Builder builder = new FieldInfos.Builder(new FieldInfos.FieldNumbers(null));
	FieldInfo fi = builder.getOrAdd("field");
	fi.setIndexOptions(TextField.TYPE_STORED.indexOptions());
	addAttributes(fi);
	FieldInfos infos = builder.finish();

	fail.setDoFail();
	expectThrows(FakeIOException.class, () -> {
	codec.fieldInfosFormat().write(dir, segmentInfo, "", infos, IOContext.DEFAULT);
	});
	fail.clearDoFail();

	dir.close();
	}

	/**
	* Test field infos read that hits exception immediately on open.
	* make sure we get our exception back, no file handle leaks, etc.
	*/
	public void testExceptionOnOpenInput() throws Exception {
	Failure fail = new Failure() {
	@Override
	public void eval(MockDirectoryWrapper dir) throws IOException {
	if (doFail && callStackContainsAnyOf("openInput")) {
	throw new FakeIOException();
	}
	}
	};

	MockDirectoryWrapper dir = newMockDirectory();
	dir.failOn(fail);
	Codec codec = getCodec();
	SegmentInfo segmentInfo = newSegmentInfo(dir, "_123");
	FieldInfos.Builder builder = new FieldInfos.Builder(new FieldInfos.FieldNumbers(null));
	FieldInfo fi = builder.getOrAdd("field");
	fi.setIndexOptions(TextField.TYPE_STORED.indexOptions());
	addAttributes(fi);
	FieldInfos infos = builder.finish();
	codec.fieldInfosFormat().write(dir, segmentInfo, "", infos, IOContext.DEFAULT);

	fail.setDoFail();
	expectThrows(FakeIOException.class, () -> {
	codec.fieldInfosFormat().read(dir, segmentInfo, "", IOContext.DEFAULT);
	});
	fail.clearDoFail();

	dir.close();
	}

	/**
	* Test field infos read that hits exception on close.
	* make sure we get our exception back, no file handle leaks, etc.
	*/
	public void testExceptionOnCloseInput() throws Exception {
	Failure fail = new Failure() {
	@Override
	public void eval(MockDirectoryWrapper dir) throws IOException {
	if (doFail && callStackContainsAnyOf("close")) {
	throw new FakeIOException();
	}
	}
	};

	MockDirectoryWrapper dir = newMockDirectory();
	dir.failOn(fail);
	Codec codec = getCodec();
	SegmentInfo segmentInfo = newSegmentInfo(dir, "_123");
	FieldInfos.Builder builder = new FieldInfos.Builder(new FieldInfos.FieldNumbers(null));
	FieldInfo fi = builder.getOrAdd("field");
	fi.setIndexOptions(TextField.TYPE_STORED.indexOptions());
	addAttributes(fi);
	FieldInfos infos = builder.finish();
	codec.fieldInfosFormat().write(dir, segmentInfo, "", infos, IOContext.DEFAULT);

	fail.setDoFail();
	expectThrows(FakeIOException.class, () -> {
	codec.fieldInfosFormat().read(dir, segmentInfo, "", IOContext.DEFAULT);
	});
	fail.clearDoFail();

	dir.close();
	}

	// TODO: more tests

	/** Test field infos read/write with random fields, with different values. */
	public void testRandom() throws Exception {
	Directory dir = newDirectory();
	Codec codec = getCodec();
	SegmentInfo segmentInfo = newSegmentInfo(dir, "_123");

	// generate a bunch of fields
	int numFields = atLeast(2000);
	Set<String> fieldNames = new HashSet<>();
	for (int i = 0; i < numFields; i++) {
	fieldNames.add(TestUtil.randomUnicodeString(random()));
	}

	String softDeletesField =
	random().nextBoolean() ? TestUtil.randomUnicodeString(random()) : null;
	FieldInfos.Builder builder =
	new FieldInfos.Builder(new FieldInfos.FieldNumbers(softDeletesField));

	for (String field : fieldNames) {
	IndexableFieldType fieldType = randomFieldType(random());
	FieldInfo fi = builder.getOrAdd(field);
	IndexOptions indexOptions = fieldType.indexOptions();
	if (indexOptions != IndexOptions.NONE) {
	fi.setIndexOptions(indexOptions);
	if (fieldType.omitNorms()) {
	fi.setOmitsNorms();
	}
	}
	fi.setDocValuesType(fieldType.docValuesType());
	if (fieldType.indexOptions() != IndexOptions.NONE && fieldType.indexOptions().compareTo(IndexOptions.DOCS_AND_FREQS_AND_POSITIONS) >= 0) {
	if (random().nextBoolean()) {
	fi.setStorePayloads();
	}
	}

	if (fieldType.pointDimensionCount() > 0) {
	fi.setPointDimensions(
	fieldType.pointDimensionCount(),
	fieldType.pointIndexDimensionCount(),
	fieldType.pointNumBytes());
	}

	addAttributes(fi);
	}
	FieldInfos infos = builder.finish();
	codec.fieldInfosFormat().write(dir, segmentInfo, "", infos, IOContext.DEFAULT);
	FieldInfos infos2 = codec.fieldInfosFormat().read(dir, segmentInfo, "", IOContext.DEFAULT);
	assertEquals(infos, infos2);
	dir.close();
	}

	private final IndexableFieldType randomFieldType(Random r) {
	FieldType type = new FieldType();

	if (r.nextBoolean()) {
	IndexOptions[] values = IndexOptions.values();
	type.setIndexOptions(values[r.nextInt(values.length)]);
	type.setOmitNorms(r.nextBoolean());

	if (r.nextBoolean()) {
	type.setStoreTermVectors(true);
	if (type.indexOptions().compareTo(IndexOptions.DOCS_AND_FREQS_AND_POSITIONS) >= 0) {
	type.setStoreTermVectorPositions(r.nextBoolean());
	type.setStoreTermVectorOffsets(r.nextBoolean());
	if (type.storeTermVectorPositions()) {
	type.setStoreTermVectorPayloads(r.nextBoolean());
	}
	}
	}
	}

	if (r.nextBoolean()) {
	DocValuesType[] values = DocValuesType.values();
	type.setDocValuesType(values[r.nextInt(values.length)]);
	}

	if (r.nextBoolean()) {
	int dimension = 1 + r.nextInt(PointValues.MAX_DIMENSIONS);
	int indexDimension = 1 + r.nextInt(Math.min(dimension, PointValues.MAX_INDEX_DIMENSIONS));
	int dimensionNumBytes = 1 + r.nextInt(PointValues.MAX_NUM_BYTES);
	type.setDimensions(dimension, indexDimension, dimensionNumBytes);
	}

	return type;
	}

	/** Hook to add any codec attributes to fieldinfo instances added in this test. */
	protected void addAttributes(FieldInfo fi) {}

	/** equality for entirety of fieldinfos */
	protected void assertEquals(FieldInfos expected, FieldInfos actual) {
	assertEquals(expected.size(), actual.size());
	for (FieldInfo expectedField : expected) {
	FieldInfo actualField = actual.fieldInfo(expectedField.number);
	assertNotNull(actualField);
	assertEquals(expectedField, actualField);
	}
	}

	/** equality for two individual fieldinfo objects */
	protected void assertEquals(FieldInfo expected, FieldInfo actual) {
	assertEquals(expected.number, actual.number);
	assertEquals(expected.name, actual.name);
	assertEquals(expected.getDocValuesType(), actual.getDocValuesType());
	assertEquals(expected.getIndexOptions(), actual.getIndexOptions());
	assertEquals(expected.hasNorms(), actual.hasNorms());
	assertEquals(expected.hasPayloads(), actual.hasPayloads());
	assertEquals(expected.hasVectors(), actual.hasVectors());
	assertEquals(expected.omitsNorms(), actual.omitsNorms());
	assertEquals(expected.getDocValuesGen(), actual.getDocValuesGen());
	}

	/** Returns a new fake segment */
	protected static SegmentInfo newSegmentInfo(Directory dir, String name) {
	Version minVersion = random().nextBoolean() ? null : Version.LATEST;
	return new SegmentInfo(dir, Version.LATEST, minVersion, name, 10000, false, Codec.getDefault(), Collections.emptyMap(), StringHelper.randomId(), Collections.emptyMap(), null);
	}

	@Override
	protected void addRandomFields(Document doc) {
	doc.add(new StoredField("foobar", TestUtil.randomSimpleString(random())));
	}

	@Override
	public void testRamBytesUsed() throws IOException {
	assumeTrue("not applicable for this format", true);
	}
	}