LUCENE-5916: Static scope test components should be consistent between tests (and test iterations)

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1621889 13f79535-47bb-0310-9956-ffa450edef68

lucene/CHANGES.txt

@@ -127,6 +127,10 @@ Bug Fixes
   MockDirectoryWrapper to have it simulate a virus checker holding a
   file open and preventing deletion (Robert Muir, Mike McCandless)
 
+* LUCENE-5916: Static scope test components should be consistent between
+  tests (and test iterations). Fix for FaultyIndexInput in particular.
+  (Dawid Weiss)
+
 Build
 
 * LUCENE-5909: Smoke tester now has better command line parsing and

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

@@ -20,6 +20,7 @@ package org.apache.lucene.index;
 import java.io.File;
 import java.io.IOException;
 import java.util.*;
+import java.util.concurrent.atomic.AtomicBoolean;
 
 import org.apache.lucene.analysis.MockAnalyzer;
 import org.apache.lucene.document.Document;
@@ -58,7 +59,6 @@ public class TestFieldsReader extends LuceneTestCase {
     IndexWriter writer = new IndexWriter(dir, conf);
     writer.addDocument(testDoc);
     writer.close();
-    FaultyIndexInput.doFail = false;
   }
 
   @AfterClass
@@ -105,77 +105,97 @@ public class TestFieldsReader extends LuceneTestCase {
   }
 
 
-  public static class FaultyFSDirectory extends BaseDirectory {
-
+  public class FaultyFSDirectory extends BaseDirectory {
     Directory fsDir;
+    AtomicBoolean doFail = new AtomicBoolean();
 
     public FaultyFSDirectory(File dir) {
       fsDir = newFSDirectory(dir);
       lockFactory = fsDir.getLockFactory();
     }
+    
     @Override
     public IndexInput openInput(String name, IOContext context) throws IOException {
-      return new FaultyIndexInput(fsDir.openInput(name, context));
+      return new FaultyIndexInput(doFail, fsDir.openInput(name, context));
     }
+    
     @Override
     public String[] listAll() throws IOException {
       return fsDir.listAll();
     }
+    
     @Override
     public void deleteFile(String name) throws IOException {
       fsDir.deleteFile(name);
     }
+    
     @Override
     public long fileLength(String name) throws IOException {
       return fsDir.fileLength(name);
     }
+    
     @Override
     public IndexOutput createOutput(String name, IOContext context) throws IOException {
       return fsDir.createOutput(name, context);
     }
+    
     @Override
     public void sync(Collection<String> names) throws IOException {
       fsDir.sync(names);
     }
+
     @Override
     public void close() throws IOException {
       fsDir.close();
     }
+
+    public void startFailing() {
+      doFail.set(true);
+    }
   }
 
-  private static class FaultyIndexInput extends BufferedIndexInput {
+  private class FaultyIndexInput extends BufferedIndexInput {
+    private final AtomicBoolean doFail;
+
     IndexInput delegate;
-    static boolean doFail;
     int count;
-    private FaultyIndexInput(IndexInput delegate) {
+
+    private FaultyIndexInput(AtomicBoolean doFail, IndexInput delegate) {
       super("FaultyIndexInput(" + delegate + ")", BufferedIndexInput.BUFFER_SIZE);
       this.delegate = delegate;
+      this.doFail = doFail;
     }
+
     private void simOutage() throws IOException {
-      if (doFail && count++ % 2 == 1) {
+      if (doFail.get() && count++ % 2 == 1) {
         throw new IOException("Simulated network outage");
       }
     }
+
     @Override
     public void readInternal(byte[] b, int offset, int length) throws IOException {
       simOutage();
       delegate.seek(getFilePointer());
       delegate.readBytes(b, offset, length);
     }
+    
     @Override
     public void seekInternal(long pos) throws IOException {
     }
+    
     @Override
     public long length() {
       return delegate.length();
     }
+    
     @Override
     public void close() throws IOException {
       delegate.close();
     }
+    
     @Override
     public FaultyIndexInput clone() {
-      FaultyIndexInput i = new FaultyIndexInput(delegate.clone());
+      FaultyIndexInput i = new FaultyIndexInput(doFail, delegate.clone());
       // seek the clone to our current position
       try {
         i.seek(getFilePointer());
@@ -188,7 +208,7 @@ public class TestFieldsReader extends LuceneTestCase {
     @Override
     public IndexInput slice(String sliceDescription, long offset, long length) throws IOException {
       IndexInput slice = delegate.slice(sliceDescription, offset, length);
-      return new FaultyIndexInput(slice);
+      return new FaultyIndexInput(doFail, slice);
     }
   }
 
@@ -197,7 +217,7 @@ public class TestFieldsReader extends LuceneTestCase {
     File indexDir = createTempDir("testfieldswriterexceptions");
 
     try {
-      Directory dir = new FaultyFSDirectory(indexDir);
+      FaultyFSDirectory dir = new FaultyFSDirectory(indexDir);
       IndexWriterConfig iwc = newIndexWriterConfig(new MockAnalyzer(random()))
                                 .setOpenMode(OpenMode.CREATE);
       IndexWriter writer = new IndexWriter(dir, iwc);
@@ -207,8 +227,7 @@ public class TestFieldsReader extends LuceneTestCase {
       writer.close();
 
       IndexReader reader = DirectoryReader.open(dir);
-
-      FaultyIndexInput.doFail = true;
+      dir.startFailing();
 
       boolean exc = false;