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From mikemcc...@apache.org
Subject [16/21] lucene-solr:branch_6x: LUCENE_6766: add missing first/last tests
Date Sat, 11 Jun 2016 15:49:32 GMT
LUCENE_6766: add missing first/last tests


Project: http://git-wip-us.apache.org/repos/asf/lucene-solr/repo
Commit: http://git-wip-us.apache.org/repos/asf/lucene-solr/commit/dc5c5126
Tree: http://git-wip-us.apache.org/repos/asf/lucene-solr/tree/dc5c5126
Diff: http://git-wip-us.apache.org/repos/asf/lucene-solr/diff/dc5c5126

Branch: refs/heads/branch_6x
Commit: dc5c5126a2fb6cb97c2d3883de4b72d08082e779
Parents: c26bb87
Author: Mike McCandless <mikemccand@apache.org>
Authored: Sun May 8 06:41:55 2016 -0400
Committer: Mike McCandless <mikemccand@apache.org>
Committed: Sat Jun 11 11:48:40 2016 -0400

----------------------------------------------------------------------
 .../lucene62/Lucene62SegmentInfoFormat.java     |   2 +-
 .../org/apache/lucene/index/MultiSorter.java    |  12 +-
 .../org/apache/lucene/index/SegmentMerger.java  |   7 +
 .../apache/lucene/index/TestIndexSorting.java   | 381 ++++++++++++++++++-
 4 files changed, 383 insertions(+), 19 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/lucene-solr/blob/dc5c5126/lucene/core/src/java/org/apache/lucene/codecs/lucene62/Lucene62SegmentInfoFormat.java
----------------------------------------------------------------------
diff --git a/lucene/core/src/java/org/apache/lucene/codecs/lucene62/Lucene62SegmentInfoFormat.java
b/lucene/core/src/java/org/apache/lucene/codecs/lucene62/Lucene62SegmentInfoFormat.java
index 762b2c0..da19594 100644
--- a/lucene/core/src/java/org/apache/lucene/codecs/lucene62/Lucene62SegmentInfoFormat.java
+++ b/lucene/core/src/java/org/apache/lucene/codecs/lucene62/Lucene62SegmentInfoFormat.java
@@ -299,7 +299,7 @@ public class Lucene62SegmentInfoFormat extends SegmentInfoFormat {
             break;
           case FLOAT:
             output.writeByte((byte) 1);
-            output.writeLong(Float.floatToIntBits(((Float) missingValue).floatValue()));
+            output.writeInt(Float.floatToIntBits(((Float) missingValue).floatValue()));
             break;
           default:
             throw new IllegalStateException("Unexpected sort type: " + sortField.getType());

http://git-wip-us.apache.org/repos/asf/lucene-solr/blob/dc5c5126/lucene/core/src/java/org/apache/lucene/index/MultiSorter.java
----------------------------------------------------------------------
diff --git a/lucene/core/src/java/org/apache/lucene/index/MultiSorter.java b/lucene/core/src/java/org/apache/lucene/index/MultiSorter.java
index 39ef8d8..1c67fd5 100644
--- a/lucene/core/src/java/org/apache/lucene/index/MultiSorter.java
+++ b/lucene/core/src/java/org/apache/lucene/index/MultiSorter.java
@@ -136,9 +136,9 @@ final class MultiSorter {
         }
         final int missingOrd;
         if (sortField.getMissingValue() == SortField.STRING_LAST) {
-          missingOrd = Integer.MIN_VALUE;
-        } else {
           missingOrd = Integer.MAX_VALUE;
+        } else {
+          missingOrd = Integer.MIN_VALUE;
         }
 
         final int reverseMul;
@@ -180,10 +180,10 @@ final class MultiSorter {
           reverseMul = 1;
         }
 
-        final int missingValue;
+        final long missingValue;
 
         if (sortField.getMissingValue() != null) {
-          missingValue = (Integer) sortField.getMissingValue();
+          missingValue = (Long) sortField.getMissingValue();
         } else {
           missingValue = 0;
         }
@@ -193,14 +193,14 @@ final class MultiSorter {
           public int compare(int readerIndexA, int docIDA, int readerIndexB, int docIDB)
{
             long valueA;
             if (docsWithFields.get(readerIndexA).get(docIDA)) {
-              valueA = (int) values.get(readerIndexA).get(docIDA);
+              valueA = values.get(readerIndexA).get(docIDA);
             } else {
               valueA = missingValue;
             }
 
             long valueB;
             if (docsWithFields.get(readerIndexB).get(docIDB)) {
-              valueB = (int) values.get(readerIndexB).get(docIDB);
+              valueB = values.get(readerIndexB).get(docIDB);
             } else {
               valueB = missingValue;
             }

http://git-wip-us.apache.org/repos/asf/lucene-solr/blob/dc5c5126/lucene/core/src/java/org/apache/lucene/index/SegmentMerger.java
----------------------------------------------------------------------
diff --git a/lucene/core/src/java/org/apache/lucene/index/SegmentMerger.java b/lucene/core/src/java/org/apache/lucene/index/SegmentMerger.java
index b0d9bcf..0cc1823 100644
--- a/lucene/core/src/java/org/apache/lucene/index/SegmentMerger.java
+++ b/lucene/core/src/java/org/apache/lucene/index/SegmentMerger.java
@@ -48,6 +48,8 @@ final class SegmentMerger {
   final MergeState mergeState;
   private final FieldInfos.Builder fieldInfosBuilder;
 
+  // nocommit make sure infoStream states per-segment-being-merged if they are already sorted
+
   // note, just like in codec apis Directory 'dir' is NOT the same as segmentInfo.dir!!
   SegmentMerger(List<CodecReader> readers, SegmentInfo segmentInfo, InfoStream infoStream,
Directory dir,
                 FieldInfos.FieldNumbers fieldNumbers, IOContext context) throws IOException
{
@@ -59,6 +61,11 @@ final class SegmentMerger {
     this.codec = segmentInfo.getCodec();
     this.context = context;
     this.fieldInfosBuilder = new FieldInfos.Builder(fieldNumbers);
+    if (mergeState.infoStream.isEnabled("SM")) {
+      if (segmentInfo.getIndexSort() != null) {
+        mergeState.infoStream.message("SM", "index sort during merge: " + segmentInfo.getIndexSort());
+      }
+    }
   }
   
   /** True if any merging should happen */

http://git-wip-us.apache.org/repos/asf/lucene-solr/blob/dc5c5126/lucene/core/src/test/org/apache/lucene/index/TestIndexSorting.java
----------------------------------------------------------------------
diff --git a/lucene/core/src/test/org/apache/lucene/index/TestIndexSorting.java b/lucene/core/src/test/org/apache/lucene/index/TestIndexSorting.java
index 278aadc..3eb30ec 100644
--- a/lucene/core/src/test/org/apache/lucene/index/TestIndexSorting.java
+++ b/lucene/core/src/test/org/apache/lucene/index/TestIndexSorting.java
@@ -118,6 +118,76 @@ public class TestIndexSorting extends LuceneTestCase {
     dir.close();
   }
 
+  public void testMissingStringFirst() throws Exception {
+    Directory dir = newDirectory();
+    IndexWriterConfig iwc = new IndexWriterConfig(new MockAnalyzer(random()));
+    SortField sortField = new SortField("foo", SortField.Type.STRING);
+    sortField.setMissingValue(SortField.STRING_FIRST);
+    Sort indexSort = new Sort(sortField);
+    iwc.setIndexSort(indexSort);
+    IndexWriter w = new IndexWriter(dir, iwc);
+    Document doc = new Document();
+    doc.add(new SortedDocValuesField("foo", new BytesRef("zzz")));
+    w.addDocument(doc);
+    // so we get more than one segment, so that forceMerge actually does merge, since we
only get a sorted segment by merging:
+    w.commit();
+
+    // missing
+    w.addDocument(new Document());
+    w.commit();
+
+    doc = new Document();
+    doc.add(new SortedDocValuesField("foo", new BytesRef("mmm")));
+    w.addDocument(doc);
+    w.forceMerge(1);
+
+    DirectoryReader r = DirectoryReader.open(w);
+    LeafReader leaf = getOnlyLeafReader(r);
+    assertEquals(3, leaf.maxDoc());
+    SortedDocValues values = leaf.getSortedDocValues("foo");
+    assertEquals(-1, values.getOrd(0));
+    assertEquals("mmm", values.get(1).utf8ToString());
+    assertEquals("zzz", values.get(2).utf8ToString());
+    r.close();
+    w.close();
+    dir.close();
+  }
+
+  public void testMissingStringLast() throws Exception {
+    Directory dir = newDirectory();
+    IndexWriterConfig iwc = new IndexWriterConfig(new MockAnalyzer(random()));
+    SortField sortField = new SortField("foo", SortField.Type.STRING);
+    sortField.setMissingValue(SortField.STRING_LAST);
+    Sort indexSort = new Sort(sortField);
+    iwc.setIndexSort(indexSort);
+    IndexWriter w = new IndexWriter(dir, iwc);
+    Document doc = new Document();
+    doc.add(new SortedDocValuesField("foo", new BytesRef("zzz")));
+    w.addDocument(doc);
+    // so we get more than one segment, so that forceMerge actually does merge, since we
only get a sorted segment by merging:
+    w.commit();
+
+    // missing
+    w.addDocument(new Document());
+    w.commit();
+
+    doc = new Document();
+    doc.add(new SortedDocValuesField("foo", new BytesRef("mmm")));
+    w.addDocument(doc);
+    w.forceMerge(1);
+
+    DirectoryReader r = DirectoryReader.open(w);
+    LeafReader leaf = getOnlyLeafReader(r);
+    assertEquals(3, leaf.maxDoc());
+    SortedDocValues values = leaf.getSortedDocValues("foo");
+    assertEquals("mmm", values.get(0).utf8ToString());
+    assertEquals("zzz", values.get(1).utf8ToString());
+    assertEquals(-1, values.getOrd(2));
+    r.close();
+    w.close();
+    dir.close();
+  }
+
   public void testBasicLong() throws Exception {
     Directory dir = newDirectory();
     IndexWriterConfig iwc = new IndexWriterConfig(new MockAnalyzer(random()));
@@ -152,6 +222,80 @@ public class TestIndexSorting extends LuceneTestCase {
     dir.close();
   }
 
+  public void testMissingLongFirst() throws Exception {
+    Directory dir = newDirectory();
+    IndexWriterConfig iwc = new IndexWriterConfig(new MockAnalyzer(random()));
+    SortField sortField = new SortField("foo", SortField.Type.LONG);
+    sortField.setMissingValue(Long.valueOf(Long.MIN_VALUE));
+    Sort indexSort = new Sort(sortField);
+    iwc.setIndexSort(indexSort);
+    IndexWriter w = new IndexWriter(dir, iwc);
+    Document doc = new Document();
+    doc.add(new NumericDocValuesField("foo", 18));
+    w.addDocument(doc);
+    // so we get more than one segment, so that forceMerge actually does merge, since we
only get a sorted segment by merging:
+    w.commit();
+
+    // missing
+    w.addDocument(new Document());
+    w.commit();
+
+    doc = new Document();
+    doc.add(new NumericDocValuesField("foo", 7));
+    w.addDocument(doc);
+    w.forceMerge(1);
+
+    DirectoryReader r = DirectoryReader.open(w);
+    LeafReader leaf = getOnlyLeafReader(r);
+    assertEquals(3, leaf.maxDoc());
+    NumericDocValues values = leaf.getNumericDocValues("foo");
+    Bits docsWithField = leaf.getDocsWithField("foo");
+    assertEquals(0, values.get(0));
+    assertFalse(docsWithField.get(0));
+    assertEquals(7, values.get(1));
+    assertEquals(18, values.get(2));
+    r.close();
+    w.close();
+    dir.close();
+  }
+
+  public void testMissingLongLast() throws Exception {
+    Directory dir = newDirectory();
+    IndexWriterConfig iwc = new IndexWriterConfig(new MockAnalyzer(random()));
+    SortField sortField = new SortField("foo", SortField.Type.LONG);
+    sortField.setMissingValue(Long.valueOf(Long.MAX_VALUE));
+    Sort indexSort = new Sort(sortField);
+    iwc.setIndexSort(indexSort);
+    IndexWriter w = new IndexWriter(dir, iwc);
+    Document doc = new Document();
+    doc.add(new NumericDocValuesField("foo", 18));
+    w.addDocument(doc);
+    // so we get more than one segment, so that forceMerge actually does merge, since we
only get a sorted segment by merging:
+    w.commit();
+
+    // missing
+    w.addDocument(new Document());
+    w.commit();
+
+    doc = new Document();
+    doc.add(new NumericDocValuesField("foo", 7));
+    w.addDocument(doc);
+    w.forceMerge(1);
+
+    DirectoryReader r = DirectoryReader.open(w);
+    LeafReader leaf = getOnlyLeafReader(r);
+    assertEquals(3, leaf.maxDoc());
+    NumericDocValues values = leaf.getNumericDocValues("foo");
+    Bits docsWithField = leaf.getDocsWithField("foo");
+    assertEquals(7, values.get(0));
+    assertEquals(18, values.get(1));
+    assertEquals(0, values.get(2));
+    assertFalse(docsWithField.get(2));
+    r.close();
+    w.close();
+    dir.close();
+  }
+
   public void testBasicInt() throws Exception {
     Directory dir = newDirectory();
     IndexWriterConfig iwc = new IndexWriterConfig(new MockAnalyzer(random()));
@@ -186,6 +330,80 @@ public class TestIndexSorting extends LuceneTestCase {
     dir.close();
   }
 
+  public void testMissingIntFirst() throws Exception {
+    Directory dir = newDirectory();
+    IndexWriterConfig iwc = new IndexWriterConfig(new MockAnalyzer(random()));
+    SortField sortField = new SortField("foo", SortField.Type.INT);
+    sortField.setMissingValue(Integer.valueOf(Integer.MIN_VALUE));
+    Sort indexSort = new Sort(sortField);
+    iwc.setIndexSort(indexSort);
+    IndexWriter w = new IndexWriter(dir, iwc);
+    Document doc = new Document();
+    doc.add(new NumericDocValuesField("foo", 18));
+    w.addDocument(doc);
+    // so we get more than one segment, so that forceMerge actually does merge, since we
only get a sorted segment by merging:
+    w.commit();
+
+    // missing
+    w.addDocument(new Document());
+    w.commit();
+
+    doc = new Document();
+    doc.add(new NumericDocValuesField("foo", 7));
+    w.addDocument(doc);
+    w.forceMerge(1);
+
+    DirectoryReader r = DirectoryReader.open(w);
+    LeafReader leaf = getOnlyLeafReader(r);
+    assertEquals(3, leaf.maxDoc());
+    NumericDocValues values = leaf.getNumericDocValues("foo");
+    Bits docsWithField = leaf.getDocsWithField("foo");
+    assertEquals(0, values.get(0));
+    assertFalse(docsWithField.get(0));
+    assertEquals(7, values.get(1));
+    assertEquals(18, values.get(2));
+    r.close();
+    w.close();
+    dir.close();
+  }
+
+  public void testMissingIntLast() throws Exception {
+    Directory dir = newDirectory();
+    IndexWriterConfig iwc = new IndexWriterConfig(new MockAnalyzer(random()));
+    SortField sortField = new SortField("foo", SortField.Type.INT);
+    sortField.setMissingValue(Integer.valueOf(Integer.MAX_VALUE));
+    Sort indexSort = new Sort(sortField);
+    iwc.setIndexSort(indexSort);
+    IndexWriter w = new IndexWriter(dir, iwc);
+    Document doc = new Document();
+    doc.add(new NumericDocValuesField("foo", 18));
+    w.addDocument(doc);
+    // so we get more than one segment, so that forceMerge actually does merge, since we
only get a sorted segment by merging:
+    w.commit();
+
+    // missing
+    w.addDocument(new Document());
+    w.commit();
+
+    doc = new Document();
+    doc.add(new NumericDocValuesField("foo", 7));
+    w.addDocument(doc);
+    w.forceMerge(1);
+
+    DirectoryReader r = DirectoryReader.open(w);
+    LeafReader leaf = getOnlyLeafReader(r);
+    assertEquals(3, leaf.maxDoc());
+    NumericDocValues values = leaf.getNumericDocValues("foo");
+    Bits docsWithField = leaf.getDocsWithField("foo");
+    assertEquals(7, values.get(0));
+    assertEquals(18, values.get(1));
+    assertEquals(0, values.get(2));
+    assertFalse(docsWithField.get(2));
+    r.close();
+    w.close();
+    dir.close();
+  }
+
   public void testBasicDouble() throws Exception {
     Directory dir = newDirectory();
     IndexWriterConfig iwc = new IndexWriterConfig(new MockAnalyzer(random()));
@@ -220,6 +438,80 @@ public class TestIndexSorting extends LuceneTestCase {
     dir.close();
   }
 
+  public void testMissingDoubleFirst() throws Exception {
+    Directory dir = newDirectory();
+    IndexWriterConfig iwc = new IndexWriterConfig(new MockAnalyzer(random()));
+    SortField sortField = new SortField("foo", SortField.Type.DOUBLE);
+    sortField.setMissingValue(Double.NEGATIVE_INFINITY);
+    Sort indexSort = new Sort(sortField);
+    iwc.setIndexSort(indexSort);
+    IndexWriter w = new IndexWriter(dir, iwc);
+    Document doc = new Document();
+    doc.add(new DoubleDocValuesField("foo", 18.0));
+    w.addDocument(doc);
+    // so we get more than one segment, so that forceMerge actually does merge, since we
only get a sorted segment by merging:
+    w.commit();
+
+    // missing
+    w.addDocument(new Document());
+    w.commit();
+
+    doc = new Document();
+    doc.add(new DoubleDocValuesField("foo", 7.0));
+    w.addDocument(doc);
+    w.forceMerge(1);
+
+    DirectoryReader r = DirectoryReader.open(w);
+    LeafReader leaf = getOnlyLeafReader(r);
+    assertEquals(3, leaf.maxDoc());
+    NumericDocValues values = leaf.getNumericDocValues("foo");
+    Bits docsWithField = leaf.getDocsWithField("foo");
+    assertEquals(0.0, Double.longBitsToDouble(values.get(0)), 0.0);
+    assertFalse(docsWithField.get(0));
+    assertEquals(7.0, Double.longBitsToDouble(values.get(1)), 0.0);
+    assertEquals(18.0, Double.longBitsToDouble(values.get(2)), 0.0);
+    r.close();
+    w.close();
+    dir.close();
+  }
+
+  public void testMissingDoubleLast() throws Exception {
+    Directory dir = newDirectory();
+    IndexWriterConfig iwc = new IndexWriterConfig(new MockAnalyzer(random()));
+    SortField sortField = new SortField("foo", SortField.Type.DOUBLE);
+    sortField.setMissingValue(Double.POSITIVE_INFINITY);
+    Sort indexSort = new Sort(sortField);
+    iwc.setIndexSort(indexSort);
+    IndexWriter w = new IndexWriter(dir, iwc);
+    Document doc = new Document();
+    doc.add(new DoubleDocValuesField("foo", 18.0));
+    w.addDocument(doc);
+    // so we get more than one segment, so that forceMerge actually does merge, since we
only get a sorted segment by merging:
+    w.commit();
+
+    // missing
+    w.addDocument(new Document());
+    w.commit();
+
+    doc = new Document();
+    doc.add(new DoubleDocValuesField("foo", 7.0));
+    w.addDocument(doc);
+    w.forceMerge(1);
+
+    DirectoryReader r = DirectoryReader.open(w);
+    LeafReader leaf = getOnlyLeafReader(r);
+    assertEquals(3, leaf.maxDoc());
+    NumericDocValues values = leaf.getNumericDocValues("foo");
+    Bits docsWithField = leaf.getDocsWithField("foo");
+    assertEquals(7.0, Double.longBitsToDouble(values.get(0)), 0.0);
+    assertEquals(18.0, Double.longBitsToDouble(values.get(1)), 0.0);
+    assertEquals(0.0, Double.longBitsToDouble(values.get(2)), 0.0);
+    assertFalse(docsWithField.get(2));
+    r.close();
+    w.close();
+    dir.close();
+  }
+
   public void testBasicFloat() throws Exception {
     Directory dir = newDirectory();
     IndexWriterConfig iwc = new IndexWriterConfig(new MockAnalyzer(random()));
@@ -254,7 +546,82 @@ public class TestIndexSorting extends LuceneTestCase {
     dir.close();
   }
 
-  public void testSortOnMerge(boolean withDeletes) throws IOException {
+  public void testMissingFloatFirst() throws Exception {
+    Directory dir = newDirectory();
+    IndexWriterConfig iwc = new IndexWriterConfig(new MockAnalyzer(random()));
+    SortField sortField = new SortField("foo", SortField.Type.FLOAT);
+    sortField.setMissingValue(Float.NEGATIVE_INFINITY);
+    Sort indexSort = new Sort(sortField);
+    iwc.setIndexSort(indexSort);
+    IndexWriter w = new IndexWriter(dir, iwc);
+    Document doc = new Document();
+    doc.add(new FloatDocValuesField("foo", 18.0f));
+    w.addDocument(doc);
+    // so we get more than one segment, so that forceMerge actually does merge, since we
only get a sorted segment by merging:
+    w.commit();
+
+    // missing
+    w.addDocument(new Document());
+    w.commit();
+
+    doc = new Document();
+    doc.add(new FloatDocValuesField("foo", 7.0f));
+    w.addDocument(doc);
+    w.forceMerge(1);
+
+    DirectoryReader r = DirectoryReader.open(w);
+    LeafReader leaf = getOnlyLeafReader(r);
+    assertEquals(3, leaf.maxDoc());
+    NumericDocValues values = leaf.getNumericDocValues("foo");
+    Bits docsWithField = leaf.getDocsWithField("foo");
+    assertEquals(0.0f, Float.intBitsToFloat((int) values.get(0)), 0.0f);
+    assertFalse(docsWithField.get(0));
+    assertEquals(7.0f, Float.intBitsToFloat((int) values.get(1)), 0.0f);
+    assertEquals(18.0f, Float.intBitsToFloat((int) values.get(2)), 0.0f);
+    r.close();
+    w.close();
+    dir.close();
+  }
+
+  public void testMissingFloatLast() throws Exception {
+    Directory dir = newDirectory();
+    IndexWriterConfig iwc = new IndexWriterConfig(new MockAnalyzer(random()));
+    SortField sortField = new SortField("foo", SortField.Type.FLOAT);
+    sortField.setMissingValue(Float.POSITIVE_INFINITY);
+    Sort indexSort = new Sort(sortField);
+    iwc.setIndexSort(indexSort);
+    IndexWriter w = new IndexWriter(dir, iwc);
+    Document doc = new Document();
+    doc.add(new FloatDocValuesField("foo", 18.0f));
+    w.addDocument(doc);
+    // so we get more than one segment, so that forceMerge actually does merge, since we
only get a sorted segment by merging:
+    w.commit();
+
+    // missing
+    w.addDocument(new Document());
+    w.commit();
+
+    doc = new Document();
+    doc.add(new FloatDocValuesField("foo", 7.0f));
+    w.addDocument(doc);
+    w.forceMerge(1);
+
+    DirectoryReader r = DirectoryReader.open(w);
+    LeafReader leaf = getOnlyLeafReader(r);
+    assertEquals(3, leaf.maxDoc());
+    NumericDocValues values = leaf.getNumericDocValues("foo");
+    Bits docsWithField = leaf.getDocsWithField("foo");
+    assertEquals(7.0f, Float.intBitsToFloat((int) values.get(0)), 0.0f);
+    assertEquals(18.0f, Float.intBitsToFloat((int) values.get(1)), 0.0f);
+    assertEquals(0.0f, Float.intBitsToFloat((int) values.get(2)), 0.0f);
+    assertFalse(docsWithField.get(2));
+    r.close();
+    w.close();
+    dir.close();
+  }
+
+  public void testRandom1() throws IOException {
+    boolean withDeletes = random().nextBoolean();
     Directory dir = newDirectory();
     IndexWriterConfig iwc = new IndexWriterConfig(new MockAnalyzer(random()));
     Sort indexSort = new Sort(new SortField("foo", SortField.Type.LONG));
@@ -323,14 +690,6 @@ public class TestIndexSorting extends LuceneTestCase {
     dir.close();
   }
 
-  public void testSortOnMerge() throws IOException {
-    testSortOnMerge(false);
-  }
-
-  public void testSortOnMergeWithDeletes() throws IOException {
-    testSortOnMerge(true);
-  }
-
   static class UpdateRunnable implements Runnable {
 
     private final int numDocs;
@@ -666,9 +1025,7 @@ public class TestIndexSorting extends LuceneTestCase {
     }
   }
 
-  // nocommit testrandom1 with deletions
-
-  public void testRandom1() throws Exception {
+  public void testRandom2() throws Exception {
     int numDocs = atLeast(100);
 
     FieldType POSITIONS_TYPE = new FieldType(TextField.TYPE_NOT_STORED);


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