LUCENE-5644: i moved this test over to new class

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1593027 13f79535-47bb-0310-9956-ffa450edef68

lucene/core/src/test/org/apache/lucene/index/TestIndexWriter.java

@@ -2788,66 +2788,4 @@ public class TestIndexWriter extends LuceneTestCase {
     r.close();
     dir.close();
   }
-
-  // LUCENE-5644
-  public void testSegmentCountOnFlush() throws Exception {
-    Directory dir = newDirectory();
-    final IndexWriter w = new IndexWriter(dir, new IndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random())));
-    final CountDownLatch startingGun = new CountDownLatch(1);
-    final CountDownLatch startDone = new CountDownLatch(2);
-    final CountDownLatch middleGun = new CountDownLatch(1);
-    final CountDownLatch finalGun = new CountDownLatch(1);
-    Thread[] threads = new Thread[2];
-    for(int i=0;i<threads.length;i++) {
-      final int threadID = i;
-      threads[i] = new Thread() {
-          @Override
-          public void run() {
-            try {
-              startingGun.await();
-              Document doc = new Document();
-              doc.add(newTextField("field", "here is some text", Field.Store.NO));
-              w.addDocument(doc);
-              startDone.countDown();
-
-              middleGun.await();
-              if (threadID == 0) {
-                w.addDocument(doc);
-              } else {
-                finalGun.await();
-                w.addDocument(doc);
-              }
-            } catch (Exception e) {
-              throw new RuntimeException(e);
-            }
-          }
-        };
-      threads[i].start();
-    }
-
-    startingGun.countDown();
-    startDone.await();
-
-    IndexReader r = DirectoryReader.open(w, true);
-    assertEquals(2, r.numDocs());
-    int numSegments = r.leaves().size();
-    // 1 segment if the threads ran sequentially, else 2:
-    assertTrue(numSegments <= 2);
-    r.close();
-
-    middleGun.countDown();
-    threads[0].join();
-
-    finalGun.countDown();
-    threads[1].join();
-
-    r = DirectoryReader.open(w, true);
-    assertEquals(4, r.numDocs());
-    // Both threads should have shared a single thread state since they did not try to index concurrently:
-    assertEquals(1+numSegments, r.leaves().size());
-    r.close();
-
-    w.close();
-    dir.close();
-  }
 }