Index: lucene/core/src/test/org/apache/lucene/index/TestIndexWriter.java
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- lucene/core/src/test/org/apache/lucene/index/TestIndexWriter.java	(revision 1532955)
+++ lucene/core/src/test/org/apache/lucene/index/TestIndexWriter.java	(revision )
@@ -2253,6 +2253,17 @@
     assertFalse(writer.hasUncommittedChanges());
     writer.addDocument(doc);
     assertTrue(writer.hasUncommittedChanges());
+    writer.commit();
+    doc = new Document();
+    doc.add(newStringField("id", "xyz", Field.Store.YES));
+    writer.addDocument(doc);
+    assertTrue(writer.hasUncommittedChanges());
+    writer.commit();
+    assertFalse(writer.hasUncommittedChanges());
+    writer.deleteDocuments(new Term("id", "xyz"));
+    assertTrue(writer.hasUncommittedChanges());
+    writer.commit();
+    assertFalse(writer.hasUncommittedChanges());
     writer.close();
 
     writer = new IndexWriter(dir, newIndexWriterConfig( TEST_VERSION_CURRENT, new MockAnalyzer(random())));