docs/attachments/LUCENE-7340/LUCENE-7340.diff

diff --git a/lucene/memory/src/java/org/apache/lucene/index/memory/MemoryIndex.java b/lucene/memory/src/java/org/apache/lucene/index/memory/MemoryIndex.java
index cde20e5..b6adcf0 100644
--- a/lucene/memory/src/java/org/apache/lucene/index/memory/MemoryIndex.java
+++ b/lucene/memory/src/java/org/apache/lucene/index/memory/MemoryIndex.java
@@ -753,6 +753,7 @@ public class MemoryIndex {
     int sumPositions = 0;
     int sumTerms = 0;
     final BytesRef spare = new BytesRef();
+    final BytesRefBuilder payloadBuilder = storePayloads ? new BytesRefBuilder() : null;
     for (Map.Entry<String, Info> entry : fields.entrySet()) {
       String fieldName = entry.getKey();
       Info info = entry.getValue();
@@ -760,6 +761,7 @@ public class MemoryIndex {
       result.append(fieldName + ":\n");
       SliceByteStartArray sliceArray = info.sliceArray;
       int numPositions = 0;
+      int numPayloads = 0;
       SliceReader postingsReader = new SliceReader(intBlockPool);
       for (int j = 0; j < info.terms.size(); j++) {
         int ord = info.sortedTerms[j];
@@ -779,6 +781,13 @@ public class MemoryIndex {
             }
           }
           result.append(")");
+          if (storePayloads) {
+            int payloadIndex = postingsReader.readInt();
+            if (payloadIndex != -1) {
+                numPayloads += 1;
+                result.append(" : " + payloadsBytesRefs.get(payloadBuilder, payloadIndex));
+            }
+          }
           if (!postingsReader.endOfSlice()) {
             result.append(",");
           }
@@ -791,6 +800,7 @@ public class MemoryIndex {
 
       result.append("\tterms=" + info.terms.size());
       result.append(", positions=" + numPositions);
+      result.append(", payloads=" + numPayloads);
       result.append("\n");
       sumPositions += numPositions;
       sumTerms += info.terms.size();
diff --git a/lucene/memory/src/test/org/apache/lucene/index/memory/TestMemoryIndex.java b/lucene/memory/src/test/org/apache/lucene/index/memory/TestMemoryIndex.java
index 5751457..96d39aa 100644
--- a/lucene/memory/src/test/org/apache/lucene/index/memory/TestMemoryIndex.java
+++ b/lucene/memory/src/test/org/apache/lucene/index/memory/TestMemoryIndex.java
@@ -137,23 +137,33 @@ public class TestMemoryIndex extends LuceneTestCase {
     MemoryIndex mi = new MemoryIndex();
     mi.addField("field", "some terms be here", analyzer);
     TestUtil.checkReader(mi.createSearcher().getIndexReader());
+    assertNotNull(mi.toString());
+    System.out.println(mi.toString());
     
     // all combinations of offsets/payloads options
     mi = new MemoryIndex(true, true);
     mi.addField("field", "some terms be here", analyzer);
     TestUtil.checkReader(mi.createSearcher().getIndexReader());
+    assertNotNull(mi.toString());
+    System.out.println(mi.toString());
     
     mi = new MemoryIndex(true, false);
     mi.addField("field", "some terms be here", analyzer);
     TestUtil.checkReader(mi.createSearcher().getIndexReader());
+    assertNotNull(mi.toString());
+    System.out.println(mi.toString());
     
     mi = new MemoryIndex(false, true);
     mi.addField("field", "some terms be here", analyzer);
     TestUtil.checkReader(mi.createSearcher().getIndexReader());
+    assertNotNull(mi.toString());
+    System.out.println(mi.toString());
     
     mi = new MemoryIndex(false, false);
     mi.addField("field", "some terms be here", analyzer);
     TestUtil.checkReader(mi.createSearcher().getIndexReader());
+    assertNotNull(mi.toString());
+    System.out.println(mi.toString());
     
     analyzer.close();
   }