http://git-wip-us.apache.org/repos/asf/ignite/blob/67b4da70/modules/hadoop-impl/src/test/java/org/apache/ignite/internal/processors/hadoop/igfs/IgniteHadoopFileSystemAbstractSelfTest.java
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diff --git 
a/modules/hadoop-impl/src/test/java/org/apache/ignite/internal/processors/hadoop/igfs/IgniteHadoopFileSystemAbstractSelfTest.java
 
b/modules/hadoop-impl/src/test/java/org/apache/ignite/internal/processors/hadoop/igfs/IgniteHadoopFileSystemAbstractSelfTest.java
deleted file mode 100644
index 4b78e0b..0000000
--- 
a/modules/hadoop-impl/src/test/java/org/apache/ignite/internal/processors/hadoop/igfs/IgniteHadoopFileSystemAbstractSelfTest.java
+++ /dev/null
@@ -1,2432 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.ignite.internal.processors.hadoop.igfs;
-
-import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.fs.BlockLocation;
-import org.apache.hadoop.fs.ContentSummary;
-import org.apache.hadoop.fs.FSDataInputStream;
-import org.apache.hadoop.fs.FSDataOutputStream;
-import org.apache.hadoop.fs.FileStatus;
-import org.apache.hadoop.fs.FileSystem;
-import org.apache.hadoop.fs.FileUtil;
-import org.apache.hadoop.fs.Path;
-import org.apache.hadoop.fs.PathExistsException;
-import org.apache.hadoop.fs.permission.FsPermission;
-import org.apache.hadoop.security.UserGroupInformation;
-import org.apache.ignite.GridTestIoUtils;
-import org.apache.ignite.IgniteCheckedException;
-import org.apache.ignite.IgniteFileSystem;
-import org.apache.ignite.cache.CacheWriteSynchronizationMode;
-import org.apache.ignite.configuration.CacheConfiguration;
-import org.apache.ignite.configuration.FileSystemConfiguration;
-import org.apache.ignite.configuration.IgniteConfiguration;
-import org.apache.ignite.hadoop.fs.CachingHadoopFileSystemFactory;
-import org.apache.ignite.hadoop.fs.IgniteHadoopIgfsSecondaryFileSystem;
-import org.apache.ignite.hadoop.fs.v1.IgniteHadoopFileSystem;
-import org.apache.ignite.internal.processors.hadoop.igfs.HadoopIgfsEx;
-import org.apache.ignite.internal.processors.hadoop.igfs.HadoopIgfsIpcIo;
-import org.apache.ignite.internal.processors.hadoop.igfs.HadoopIgfsOutProc;
-import org.apache.ignite.internal.processors.hadoop.igfs.HadoopIgfsUtils;
-import org.apache.ignite.internal.processors.igfs.IgfsCommonAbstractTest;
-import org.apache.ignite.internal.util.GridConcurrentHashSet;
-import org.apache.ignite.internal.util.lang.GridAbsPredicate;
-import org.apache.ignite.internal.util.typedef.F;
-import org.apache.ignite.internal.util.typedef.G;
-import org.apache.ignite.internal.util.typedef.internal.U;
-import org.apache.ignite.lang.IgniteBiTuple;
-import org.apache.ignite.spi.discovery.tcp.TcpDiscoverySpi;
-import org.apache.ignite.spi.discovery.tcp.ipfinder.TcpDiscoveryIpFinder;
-import org.apache.ignite.spi.discovery.tcp.ipfinder.vm.TcpDiscoveryVmIpFinder;
-import org.apache.ignite.testframework.GridTestUtils;
-import org.jetbrains.annotations.Nullable;
-import org.jsr166.ThreadLocalRandom8;
-
-import java.io.BufferedOutputStream;
-import java.io.File;
-import java.io.FileNotFoundException;
-import java.io.FileOutputStream;
-import java.io.IOException;
-import java.io.OutputStream;
-import java.lang.reflect.Field;
-import java.net.URI;
-import java.security.PrivilegedExceptionAction;
-import java.util.ArrayDeque;
-import java.util.Arrays;
-import java.util.Collection;
-import java.util.Comparator;
-import java.util.Deque;
-import java.util.LinkedList;
-import java.util.Map;
-import java.util.UUID;
-import java.util.concurrent.Callable;
-import java.util.concurrent.ConcurrentLinkedQueue;
-import java.util.concurrent.CyclicBarrier;
-import java.util.concurrent.atomic.AtomicBoolean;
-import java.util.concurrent.atomic.AtomicInteger;
-import java.util.concurrent.atomic.AtomicReference;
-
-import static org.apache.ignite.cache.CacheAtomicityMode.TRANSACTIONAL;
-import static org.apache.ignite.cache.CacheMode.PARTITIONED;
-import static org.apache.ignite.cache.CacheMode.REPLICATED;
-import static org.apache.ignite.events.EventType.EVT_JOB_MAPPED;
-import static org.apache.ignite.events.EventType.EVT_TASK_FAILED;
-import static org.apache.ignite.events.EventType.EVT_TASK_FINISHED;
-import static org.apache.ignite.igfs.IgfsMode.PRIMARY;
-import static org.apache.ignite.igfs.IgfsMode.PROXY;
-
-/**
- * Test hadoop file system implementation.
- */
-@SuppressWarnings("all")
-public abstract class IgniteHadoopFileSystemAbstractSelfTest extends 
IgfsCommonAbstractTest {
-    /** Primary file system authority. */
-    private static final String PRIMARY_AUTHORITY = "igfs:grid0@";
-
-    /** Primary file systme URI. */
-    private static final String PRIMARY_URI = "igfs://" + PRIMARY_AUTHORITY + 
"/";
-
-    /** Secondary file system authority. */
-    private static final String SECONDARY_AUTHORITY = 
"igfs_secondary:grid_secondary@127.0.0.1:11500";
-
-    /** Secondary file systme URI. */
-    private static final String SECONDARY_URI = "igfs://" + 
SECONDARY_AUTHORITY + "/";
-
-    /** Secondary file system configuration path. */
-    private static final String SECONDARY_CFG_PATH = 
"/work/core-site-test.xml";
-
-    /** Secondary file system user. */
-    private static final String SECONDARY_FS_USER = "secondary-default";
-
-    /** Secondary endpoint configuration. */
-    protected static final IgfsIpcEndpointConfiguration SECONDARY_ENDPOINT_CFG;
-
-    /** Group size. */
-    public static final int GRP_SIZE = 128;
-
-    /** Path to the default hadoop configuration. */
-    public static final String HADOOP_FS_CFG = 
"examples/config/filesystem/core-site.xml";
-
-    /** Thread count for multithreaded tests. */
-    private static final int THREAD_CNT = 8;
-
-    /** IP finder. */
-    private final TcpDiscoveryIpFinder IP_FINDER = new 
TcpDiscoveryVmIpFinder(true);
-
-    /** Barrier for multithreaded tests. */
-    private static CyclicBarrier barrier;
-
-    /** File system. */
-    private static FileSystem fs;
-
-    /** Default IGFS mode. */
-    protected final IgfsMode mode;
-
-    /** Skip embedded mode flag. */
-    private final boolean skipEmbed;
-
-    /** Skip local shmem flag. */
-    private final boolean skipLocShmem;
-
-    /** Endpoint. */
-    private final String endpoint;
-
-    /** Primary file system URI. */
-    protected URI primaryFsUri;
-
-    /** Primary file system configuration. */
-    protected Configuration primaryFsCfg;
-
-    static {
-        SECONDARY_ENDPOINT_CFG = new IgfsIpcEndpointConfiguration();
-
-        SECONDARY_ENDPOINT_CFG.setType(IgfsIpcEndpointType.TCP);
-        SECONDARY_ENDPOINT_CFG.setPort(11500);
-    }
-
-    /** File statuses comparator. */
-    private static final Comparator<FileStatus> STATUS_COMPARATOR = new 
Comparator<FileStatus>() {
-        @SuppressWarnings("deprecation")
-        @Override public int compare(FileStatus o1, FileStatus o2) {
-            if (o1 == null || o2 == null)
-                return o1 == o2 ? 0 : o1 == null ? -1 : 1;
-
-            return o1.isDir() == o2.isDir() ? 
o1.getPath().compareTo(o2.getPath()) : o1.isDir() ? -1 : 1;
-        }
-    };
-
-    /**
-     * Constructor.
-     *
-     * @param mode Default IGFS mode.
-     * @param skipEmbed Whether to skip embedded mode.
-     * @param skipLocShmem Whether to skip local shmem mode.
-     * @param skipLocTcp Whether to skip local TCP mode.
-     */
-    protected IgniteHadoopFileSystemAbstractSelfTest(IgfsMode mode, boolean 
skipEmbed, boolean skipLocShmem) {
-        this.mode = mode;
-        this.skipEmbed = skipEmbed;
-        this.skipLocShmem = skipLocShmem;
-
-        endpoint = skipLocShmem ? "127.0.0.1:10500" : "shmem:10500";
-    }
-
-    /**
-     * Gets the user the Fs client operates on bahalf of.
-     * @return The user the Fs client operates on bahalf of.
-     */
-    protected String getClientFsUser() {
-        return "foo";
-    }
-
-    /** {@inheritDoc} */
-    @Override protected void beforeTestsStarted() throws Exception {
-        Configuration secondaryConf = configuration(SECONDARY_AUTHORITY, true, 
true);
-
-        secondaryConf.setInt("fs.igfs.block.size", 1024);
-
-        String path = U.getIgniteHome() + SECONDARY_CFG_PATH;
-
-        File file = new File(path);
-
-        try (FileOutputStream fos = new FileOutputStream(file)) {
-            secondaryConf.writeXml(fos);
-        }
-
-        startNodes();
-    }
-
-    /** {@inheritDoc} */
-    @Override protected long getTestTimeout() {
-        return 10 * 60 * 1000;
-    }
-
-    /**
-     * Starts the nodes for this test.
-     *
-     * @throws Exception If failed.
-     */
-    private void startNodes() throws Exception {
-        if (mode != PRIMARY) {
-            // Start secondary IGFS.
-            FileSystemConfiguration igfsCfg = new FileSystemConfiguration();
-
-            igfsCfg.setDataCacheName("partitioned");
-            igfsCfg.setMetaCacheName("replicated");
-            igfsCfg.setName("igfs_secondary");
-            igfsCfg.setIpcEndpointConfiguration(SECONDARY_ENDPOINT_CFG);
-            igfsCfg.setBlockSize(512 * 1024);
-            igfsCfg.setPrefetchBlocks(1);
-
-            CacheConfiguration cacheCfg = defaultCacheConfiguration();
-
-            cacheCfg.setName("partitioned");
-            cacheCfg.setCacheMode(PARTITIONED);
-            cacheCfg.setNearConfiguration(null);
-            
cacheCfg.setWriteSynchronizationMode(CacheWriteSynchronizationMode.FULL_SYNC);
-            cacheCfg.setAffinityMapper(new 
IgfsGroupDataBlocksKeyMapper(GRP_SIZE));
-            cacheCfg.setBackups(0);
-            cacheCfg.setAtomicityMode(TRANSACTIONAL);
-
-            CacheConfiguration metaCacheCfg = defaultCacheConfiguration();
-
-            metaCacheCfg.setName("replicated");
-            metaCacheCfg.setCacheMode(REPLICATED);
-            
metaCacheCfg.setWriteSynchronizationMode(CacheWriteSynchronizationMode.FULL_SYNC);
-            metaCacheCfg.setAtomicityMode(TRANSACTIONAL);
-
-            IgniteConfiguration cfg = new IgniteConfiguration();
-
-            cfg.setGridName("grid_secondary");
-
-            TcpDiscoverySpi discoSpi = new TcpDiscoverySpi();
-
-            discoSpi.setIpFinder(new TcpDiscoveryVmIpFinder(true));
-
-            cfg.setDiscoverySpi(discoSpi);
-            cfg.setCacheConfiguration(metaCacheCfg, cacheCfg);
-            cfg.setFileSystemConfiguration(igfsCfg);
-            cfg.setIncludeEventTypes(EVT_TASK_FAILED, EVT_TASK_FINISHED, 
EVT_JOB_MAPPED);
-
-            G.start(cfg);
-        }
-
-        startGrids(4);
-    }
-
-    /** {@inheritDoc} */
-    @Override protected void afterTestsStopped() throws Exception {
-        G.stopAll(true);
-
-        String path = U.getIgniteHome() + SECONDARY_CFG_PATH;
-
-        new File(path).delete();
-    }
-
-    /** {@inheritDoc} */
-    @Override protected void beforeTest() throws Exception {
-        primaryFsUri = new URI(PRIMARY_URI);
-
-        primaryFsCfg = configuration(PRIMARY_AUTHORITY, skipEmbed, 
skipLocShmem);
-
-        UserGroupInformation clientUgi = UserGroupInformation.getBestUGI(null, 
getClientFsUser());
-        assertNotNull(clientUgi);
-
-        // Create the Fs on behalf of the specific user:
-        clientUgi.doAs(new PrivilegedExceptionAction<Object>() {
-            @Override public Object run() throws Exception {
-                fs = FileSystem.get(primaryFsUri, primaryFsCfg);
-
-                return null;
-            }
-        });
-
-        barrier = new CyclicBarrier(THREAD_CNT);
-    }
-
-    /** {@inheritDoc} */
-    @Override protected void afterTest() throws Exception {
-        try {
-            HadoopIgfsUtils.clear(fs);
-        }
-        catch (Exception ignore) {
-            // No-op.
-        }
-
-        U.closeQuiet(fs);
-    }
-
-    /**
-     * Get primary IPC endpoint configuration.
-     *
-     * @param gridName Grid name.
-     * @return IPC primary endpoint configuration.
-     */
-    protected abstract IgfsIpcEndpointConfiguration 
primaryIpcEndpointConfiguration(String gridName);
-
-    /** {@inheritDoc} */
-    @Override public String getTestGridName() {
-        return "grid";
-    }
-
-    /** {@inheritDoc} */
-    @Override protected IgniteConfiguration getConfiguration(String gridName) 
throws Exception {
-        IgniteConfiguration cfg = super.getConfiguration(gridName);
-
-        TcpDiscoverySpi discoSpi = new TcpDiscoverySpi();
-
-        discoSpi.setIpFinder(IP_FINDER);
-
-        cfg.setDiscoverySpi(discoSpi);
-        cfg.setCacheConfiguration(cacheConfiguration(gridName));
-        cfg.setFileSystemConfiguration(igfsConfiguration(gridName));
-        cfg.setIncludeEventTypes(EVT_TASK_FAILED, EVT_TASK_FINISHED, 
EVT_JOB_MAPPED);
-
-        return cfg;
-    }
-
-    /**
-     * Gets cache configuration.
-     *
-     * @param gridName Grid name.
-     * @return Cache configuration.
-     */
-    protected CacheConfiguration[] cacheConfiguration(String gridName) {
-        CacheConfiguration cacheCfg = defaultCacheConfiguration();
-
-        cacheCfg.setName("partitioned");
-        cacheCfg.setCacheMode(PARTITIONED);
-        cacheCfg.setNearConfiguration(null);
-        
cacheCfg.setWriteSynchronizationMode(CacheWriteSynchronizationMode.FULL_SYNC);
-        cacheCfg.setAffinityMapper(new IgfsGroupDataBlocksKeyMapper(GRP_SIZE));
-        cacheCfg.setBackups(0);
-        cacheCfg.setAtomicityMode(TRANSACTIONAL);
-
-        CacheConfiguration metaCacheCfg = defaultCacheConfiguration();
-
-        metaCacheCfg.setName("replicated");
-        metaCacheCfg.setCacheMode(REPLICATED);
-        
metaCacheCfg.setWriteSynchronizationMode(CacheWriteSynchronizationMode.FULL_SYNC);
-        metaCacheCfg.setAtomicityMode(TRANSACTIONAL);
-
-        return new CacheConfiguration[] {metaCacheCfg, cacheCfg};
-    }
-
-    /**
-     * Gets IGFS configuration.
-     *
-     * @param gridName Grid name.
-     * @return IGFS configuration.
-     */
-    protected FileSystemConfiguration igfsConfiguration(String gridName) 
throws IgniteCheckedException {
-        FileSystemConfiguration cfg = new FileSystemConfiguration();
-
-        cfg.setDataCacheName("partitioned");
-        cfg.setMetaCacheName("replicated");
-        cfg.setName("igfs");
-        cfg.setPrefetchBlocks(1);
-        cfg.setDefaultMode(mode);
-
-        if (mode != PRIMARY) {
-            CachingHadoopFileSystemFactory fac = new 
CachingHadoopFileSystemFactory();
-
-            fac.setUri(SECONDARY_URI);
-            fac.setConfigPaths(SECONDARY_CFG_PATH);
-
-            IgniteHadoopIgfsSecondaryFileSystem sec = new 
IgniteHadoopIgfsSecondaryFileSystem();
-
-            sec.setFileSystemFactory(fac);
-            sec.setDefaultUserName(SECONDARY_FS_USER);
-
-            // NB: start() will be invoked upon IgfsImpl init.
-            cfg.setSecondaryFileSystem(sec);
-        }
-
-        
cfg.setIpcEndpointConfiguration(primaryIpcEndpointConfiguration(gridName));
-
-        cfg.setManagementPort(-1);
-        cfg.setBlockSize(512 * 1024); // Together with group blocks mapper 
will yield 64M per node groups.
-
-        return cfg;
-    }
-
-    /** @throws Exception If failed. */
-    public void testGetUriIfFSIsNotInitialized() throws Exception {
-        GridTestUtils.assertThrows(log, new Callable<Object>() {
-            @Override public Object call() throws Exception {
-                return new IgniteHadoopFileSystem().getUri();
-            }
-        }, IllegalStateException.class,
-            "URI is null (was IgniteHadoopFileSystem properly initialized?)");
-    }
-
-    /** @throws Exception If failed. */
-    @SuppressWarnings("NullableProblems")
-    public void testInitializeCheckParametersNameIsNull() throws Exception {
-        GridTestUtils.assertThrows(log, new Callable<Object>() {
-            @Override public Object call() throws Exception {
-                new IgniteHadoopFileSystem().initialize(null, new 
Configuration());
-
-                return null;
-            }
-        }, NullPointerException.class, "Ouch! Argument cannot be null: name");
-    }
-
-    /** @throws Exception If failed. */
-    @SuppressWarnings("NullableProblems")
-    public void testInitializeCheckParametersCfgIsNull() throws Exception {
-        GridTestUtils.assertThrows(log, new Callable<Object>() {
-            @Override public Object call() throws Exception {
-                new IgniteHadoopFileSystem().initialize(new URI(""), null);
-
-                return null;
-            }
-        }, NullPointerException.class, "Ouch! Argument cannot be null: cfg");
-    }
-
-    /** @throws Exception If failed. */
-    public void testInitialize() throws Exception {
-        final IgniteHadoopFileSystem fs = new IgniteHadoopFileSystem();
-
-        fs.initialize(primaryFsUri, primaryFsCfg);
-
-        // Check repeatable initialization.
-        try {
-            fs.initialize(primaryFsUri, primaryFsCfg);
-
-            fail();
-        }
-        catch (IOException e) {
-            assertTrue(e.getMessage().contains("File system is already 
initialized"));
-        }
-
-        assertEquals(primaryFsUri, fs.getUri());
-
-        assertEquals(0, fs.getUsed());
-
-        fs.close();
-    }
-
-    /**
-     * Test how IPC cache map works.
-     *
-     * @throws Exception If failed.
-     */
-    public void testIpcCache() throws Exception {
-        HadoopIgfsEx hadoop = GridTestUtils.getFieldValue(fs, "rmtClient", 
"delegateRef", "value", "hadoop");
-
-        if (hadoop instanceof HadoopIgfsOutProc) {
-            FileSystem fsOther = null;
-
-            try {
-                Field field = 
HadoopIgfsIpcIo.class.getDeclaredField("ipcCache");
-
-                field.setAccessible(true);
-
-                Map<String, HadoopIgfsIpcIo> cache = (Map<String, 
HadoopIgfsIpcIo>)field.get(null);
-
-                Configuration cfg = configuration(PRIMARY_AUTHORITY, 
skipEmbed, skipLocShmem);
-
-                // we disable caching in order to obtain new FileSystem 
instance.
-                cfg.setBoolean("fs.igfs.impl.disable.cache", true);
-
-                // Initial cache size.
-                int initSize = cache.size();
-
-                // Ensure that when IO is used by multiple file systems and 
one of them is closed, IO is not stopped.
-                fsOther = FileSystem.get(new URI(PRIMARY_URI), cfg);
-
-                assert fs != fsOther;
-
-                assertEquals(initSize, cache.size());
-
-                fsOther.close();
-
-                assertEquals(initSize, cache.size());
-
-                Field stopField = 
HadoopIgfsIpcIo.class.getDeclaredField("stopping");
-
-                stopField.setAccessible(true);
-
-                HadoopIgfsIpcIo io = null;
-
-                for (Map.Entry<String, HadoopIgfsIpcIo> ioEntry : 
cache.entrySet()) {
-                    if (endpoint.contains(ioEntry.getKey())) {
-                        io = ioEntry.getValue();
-
-                        break;
-                    }
-                }
-
-                assert io != null;
-
-                assert !(Boolean)stopField.get(io);
-
-                // Ensure that IO is stopped when nobody else is need it.
-                fs.close();
-
-                assert initSize >= cache.size();
-
-                assert (Boolean)stopField.get(io);
-            }
-            finally {
-                U.closeQuiet(fsOther);
-            }
-        }
-    }
-
-    /** @throws Exception If failed. */
-    public void testCloseIfNotInitialized() throws Exception {
-        final FileSystem fs = new IgniteHadoopFileSystem();
-
-        // Check close makes nothing harmful.
-        fs.close();
-    }
-
-    /** @throws Exception If failed. */
-    public void testClose() throws Exception {
-        final Path path = new Path("dir");
-
-        fs.close();
-
-        // Check double close makes nothing harmful.
-        fs.close();
-
-        GridTestUtils.assertThrows(log, new Callable<Object>() {
-            @Nullable @Override public Object call() throws Exception {
-                fs.initialize(primaryFsUri, primaryFsCfg);
-
-                return null;
-            }
-        }, IOException.class, "File system is stopped.");
-
-        GridTestUtils.assertThrows(log, new Callable<Object>() {
-            @Nullable @Override public Object call() throws Exception {
-                fs.setPermission(path, 
FsPermission.createImmutable((short)777));
-
-                return null;
-            }
-        }, IOException.class, "File system is stopped.");
-
-        GridTestUtils.assertThrows(log, new Callable<Object>() {
-            @Nullable @Override public Object call() throws Exception {
-                fs.setOwner(path, "user", "group");
-
-                return null;
-            }
-        }, IOException.class, "File system is stopped.");
-
-        GridTestUtils.assertThrows(log, new Callable<Object>() {
-            @Override public Object call() throws Exception {
-                return fs.open(path, 256);
-            }
-        }, IOException.class, "File system is stopped.");
-
-        GridTestUtils.assertThrows(log, new Callable<Object>() {
-            @Override public Object call() throws Exception {
-                return fs.create(path);
-            }
-        }, IOException.class, "File system is stopped.");
-
-        GridTestUtils.assertThrows(log, new Callable<Object>() {
-            @Override public Object call() throws Exception {
-                return fs.append(path);
-            }
-        }, IOException.class, "File system is stopped.");
-
-        GridTestUtils.assertThrows(log, new Callable<Object>() {
-            @Override public Object call() throws Exception {
-                return fs.rename(path, new Path("newDir"));
-            }
-        }, IOException.class, "File system is stopped.");
-
-        GridTestUtils.assertThrows(log, new Callable<Object>() {
-            @Override public Object call() throws Exception {
-                return fs.delete(path, true);
-            }
-        }, IOException.class, "File system is stopped.");
-
-        GridTestUtils.assertThrows(log, new Callable<Object>() {
-            @Override public Object call() throws Exception {
-                return fs.listStatus(path);
-            }
-        }, IOException.class, "File system is stopped.");
-
-        GridTestUtils.assertThrows(log, new Callable<Object>() {
-            @Override public Object call() throws Exception {
-                return fs.mkdirs(path);
-            }
-        }, IOException.class, "File system is stopped.");
-
-        GridTestUtils.assertThrows(log, new Callable<Object>() {
-            @Override public Object call() throws Exception {
-                return fs.getFileStatus(path);
-            }
-        }, IOException.class, "File system is stopped.");
-
-        GridTestUtils.assertThrows(log, new Callable<Object>() {
-            @Override public Object call() throws Exception {
-                return fs.getFileBlockLocations(new FileStatus(1L, false, 1, 
1L, 1L, new Path("path")), 0L, 256L);
-            }
-        }, IOException.class, "File system is stopped.");
-    }
-
-    /** @throws Exception If failed. */
-    public void testCreateCheckParameters() throws Exception {
-        GridTestUtils.assertThrows(log, new Callable<Object>() {
-            @Override public Object call() throws Exception {
-                return fs.create(null);
-            }
-        }, NullPointerException.class, "Ouch! Argument cannot be null: f");
-    }
-
-    /** @throws Exception If failed. */
-    @SuppressWarnings("deprecation")
-    public void testCreateBase() throws Exception {
-        Path fsHome = new Path(primaryFsUri);
-        Path dir = new Path(fsHome, "/someDir1/someDir2/someDir3");
-        Path file = new Path(dir, "someFile");
-
-        assertPathDoesNotExist(fs, file);
-
-        FsPermission fsPerm = new FsPermission((short)644);
-
-        FSDataOutputStream os = fs.create(file, fsPerm, false, 1, (short)1, 
1L, null);
-
-        // Try to write something in file.
-        os.write("abc".getBytes());
-
-        os.close();
-
-        // Check file status.
-        FileStatus fileStatus = fs.getFileStatus(file);
-
-        assertFalse(fileStatus.isDir());
-        assertEquals(file, fileStatus.getPath());
-        assertEquals(fsPerm, fileStatus.getPermission());
-    }
-
-    /** @throws Exception If failed. */
-    @SuppressWarnings("deprecation")
-    public void testCreateCheckOverwrite() throws Exception {
-        Path fsHome = new Path(primaryFsUri);
-        Path dir = new Path(fsHome, "/someDir1/someDir2/someDir3");
-        final Path file = new Path(dir, "someFile");
-
-        FSDataOutputStream out = fs.create(file, FsPermission.getDefault(), 
false, 64 * 1024,
-            fs.getDefaultReplication(), fs.getDefaultBlockSize(), null);
-
-        out.close();
-
-        // Check intermediate directory permissions.
-        assertEquals(FsPermission.getDefault(), 
fs.getFileStatus(dir).getPermission());
-        assertEquals(FsPermission.getDefault(), 
fs.getFileStatus(dir.getParent()).getPermission());
-        assertEquals(FsPermission.getDefault(), 
fs.getFileStatus(dir.getParent().getParent()).getPermission());
-
-        GridTestUtils.assertThrows(log, new Callable<Object>() {
-            @Override public Object call() throws Exception {
-                return fs.create(file, FsPermission.getDefault(), false, 1024, 
(short)1, 2048, null);
-            }
-        }, PathExistsException.class, null);
-
-        // Overwrite should be successful.
-        FSDataOutputStream out1 = fs.create(file, true);
-
-        out1.close();
-    }
-
-    /** @throws Exception If failed. */
-    public void testDeleteIfNoSuchPath() throws Exception {
-        Path fsHome = new Path(primaryFsUri);
-        Path dir = new Path(fsHome, "/someDir1/someDir2/someDir3");
-
-        assertPathDoesNotExist(fs, dir);
-
-        assertFalse(fs.delete(dir, true));
-    }
-
-    /** @throws Exception If failed. */
-    public void testDeleteSuccessfulIfPathIsOpenedToRead() throws Exception {
-        Path fsHome = new Path(primaryFsUri);
-        final Path file = new Path(fsHome, "myFile");
-
-        FSDataOutputStream os = fs.create(file, false, 128);
-
-        final int cnt = 5 * FileSystemConfiguration.DFLT_BLOCK_SIZE; // Write 
5 blocks.
-
-        for (int i = 0; i < cnt; i++)
-            os.writeInt(i);
-
-        os.close();
-
-        final FSDataInputStream is = fs.open(file, -1);
-
-        for (int i = 0; i < cnt / 2; i++)
-            assertEquals(i, is.readInt());
-
-        assert fs.delete(file, false);
-
-        assert !fs.exists(file);
-
-        is.close();
-    }
-
-    /** @throws Exception If failed. */
-    public void testDeleteIfFilePathExists() throws Exception {
-        Path fsHome = new Path(primaryFsUri);
-        Path file = new Path(fsHome, "myFile");
-
-        FSDataOutputStream os = fs.create(file);
-
-        os.close();
-
-        assertTrue(fs.delete(file, false));
-
-        assertPathDoesNotExist(fs, file);
-    }
-
-    /** @throws Exception If failed. */
-    public void testDeleteIfDirectoryPathExists() throws Exception {
-        Path fsHome = new Path(primaryFsUri);
-        Path dir = new Path(fsHome, "/someDir1/someDir2/someDir3");
-
-        FSDataOutputStream os = fs.create(dir);
-
-        os.close();
-
-        assertTrue(fs.delete(dir, false));
-
-        assertPathDoesNotExist(fs, dir);
-    }
-
-    /** @throws Exception If failed. */
-    public void testDeleteFailsIfNonRecursive() throws Exception {
-        Path fsHome = new Path(primaryFsUri);
-        Path someDir3 = new Path(fsHome, "/someDir1/someDir2/someDir3");
-
-        fs.create(someDir3).close();
-
-        Path someDir2 = new Path(fsHome, "/someDir1/someDir2");
-
-        assertFalse(fs.delete(someDir2, false));
-
-        assertPathExists(fs, someDir2);
-        assertPathExists(fs, someDir3);
-    }
-
-    /** @throws Exception If failed. */
-    public void testDeleteRecursively() throws Exception {
-        Path fsHome = new Path(primaryFsUri);
-        Path someDir3 = new Path(fsHome, "/someDir1/someDir2/someDir3");
-
-        FSDataOutputStream os = fs.create(someDir3);
-
-        os.close();
-
-        Path someDir2 = new Path(fsHome, "/someDir1/someDir2");
-
-        assertTrue(fs.delete(someDir2, true));
-
-        assertPathDoesNotExist(fs, someDir2);
-        assertPathDoesNotExist(fs, someDir3);
-    }
-
-    /** @throws Exception If failed. */
-    public void testDeleteRecursivelyFromRoot() throws Exception {
-        Path fsHome = new Path(primaryFsUri);
-        Path someDir3 = new Path(fsHome, "/someDir1/someDir2/someDir3");
-
-        FSDataOutputStream os = fs.create(someDir3);
-
-        os.close();
-
-        Path root = new Path(fsHome, "/");
-
-        assertFalse(fs.delete(root, true));
-        assertTrue(fs.delete(new Path("/someDir1"), true));
-
-        assertPathDoesNotExist(fs, someDir3);
-        assertPathDoesNotExist(fs, new Path(fsHome, "/someDir1/someDir2"));
-        assertPathDoesNotExist(fs, new Path(fsHome, "/someDir1"));
-        assertPathExists(fs, root);
-    }
-
-    /** @throws Exception If failed. */
-    @SuppressWarnings("deprecation")
-    public void testSetPermissionCheckDefaultPermission() throws Exception {
-        Path fsHome = new Path(primaryFsUri);
-        Path file = new Path(fsHome, "/tmp/my");
-
-        FSDataOutputStream os = fs.create(file, FsPermission.getDefault(), 
false, 64 * 1024,
-            fs.getDefaultReplication(), fs.getDefaultBlockSize(), null);
-
-        os.close();
-
-        fs.setPermission(file, null);
-
-        assertEquals(FsPermission.getDefault(), 
fs.getFileStatus(file).getPermission());
-        assertEquals(FsPermission.getDefault(), 
fs.getFileStatus(file.getParent()).getPermission());
-    }
-
-    /** @throws Exception If failed. */
-    @SuppressWarnings("deprecation")
-    public void testSetPermissionCheckNonRecursiveness() throws Exception {
-        Path fsHome = new Path(primaryFsUri);
-        Path file = new Path(fsHome, "/tmp/my");
-
-        FSDataOutputStream os = fs.create(file, FsPermission.getDefault(), 
false, 64 * 1024,
-            fs.getDefaultReplication(), fs.getDefaultBlockSize(), null);
-
-        os.close();
-
-        Path tmpDir = new Path(fsHome, "/tmp");
-
-        FsPermission perm = new FsPermission((short)123);
-
-        fs.setPermission(tmpDir, perm);
-
-        assertEquals(perm, fs.getFileStatus(tmpDir).getPermission());
-        assertEquals(FsPermission.getDefault(), 
fs.getFileStatus(file).getPermission());
-    }
-
-    /** @throws Exception If failed. */
-    @SuppressWarnings("OctalInteger")
-    public void testSetPermission() throws Exception {
-        Path fsHome = new Path(primaryFsUri);
-        Path file = new Path(fsHome, "/tmp/my");
-
-        FSDataOutputStream os = fs.create(file);
-
-        os.close();
-
-        for (short i = 0; i <= 0777; i += 7) {
-            FsPermission perm = new FsPermission(i);
-
-            fs.setPermission(file, perm);
-
-            assertEquals(perm, fs.getFileStatus(file).getPermission());
-        }
-    }
-
-    /** @throws Exception If failed. */
-    public void testSetPermissionIfOutputStreamIsNotClosed() throws Exception {
-        Path fsHome = new Path(primaryFsUri);
-        Path file = new Path(fsHome, "myFile");
-
-        FsPermission perm = new FsPermission((short)123);
-
-        FSDataOutputStream os = fs.create(file);
-
-        fs.setPermission(file, perm);
-
-        os.close();
-
-        assertEquals(perm, fs.getFileStatus(file).getPermission());
-    }
-
-    /** @throws Exception If failed. */
-    public void testSetOwnerCheckParametersPathIsNull() throws Exception {
-        Path fsHome = new Path(primaryFsUri);
-        final Path file = new Path(fsHome, "/tmp/my");
-
-        FSDataOutputStream os = fs.create(file);
-
-        os.close();
-
-        GridTestUtils.assertThrows(log, new Callable<Object>() {
-            @Override public Object call() throws Exception {
-                fs.setOwner(null, "aUser", "aGroup");
-
-                return null;
-            }
-        }, NullPointerException.class, "Ouch! Argument cannot be null: p");
-    }
-
-    /** @throws Exception If failed. */
-    public void testSetOwnerCheckParametersUserIsNull() throws Exception {
-        Path fsHome = new Path(primaryFsUri);
-        final Path file = new Path(fsHome, "/tmp/my");
-
-        FSDataOutputStream os = fs.create(file);
-
-        os.close();
-
-        GridTestUtils.assertThrows(log, new Callable<Object>() {
-            @Override public Object call() throws Exception {
-                fs.setOwner(file, null, "aGroup");
-
-                return null;
-            }
-        }, NullPointerException.class, "Ouch! Argument cannot be null: 
username");
-    }
-
-    /** @throws Exception If failed. */
-    public void testSetOwnerCheckParametersGroupIsNull() throws Exception {
-        Path fsHome = new Path(primaryFsUri);
-        final Path file = new Path(fsHome, "/tmp/my");
-
-        FSDataOutputStream os = fs.create(file);
-
-        os.close();
-
-        GridTestUtils.assertThrows(log, new Callable<Object>() {
-            @Override
-            public Object call() throws Exception {
-                fs.setOwner(file, "aUser", null);
-
-                return null;
-            }
-        }, NullPointerException.class, "Ouch! Argument cannot be null: 
grpName");
-    }
-
-    /** @throws Exception If failed. */
-    public void testSetOwner() throws Exception {
-        Path fsHome = new Path(primaryFsUri);
-        final Path file = new Path(fsHome, "/tmp/my");
-
-        FSDataOutputStream os = fs.create(file);
-
-        os.close();
-
-        assertEquals(getClientFsUser(), fs.getFileStatus(file).getOwner());
-
-        fs.setOwner(file, "aUser", "aGroup");
-
-        assertEquals("aUser", fs.getFileStatus(file).getOwner());
-        assertEquals("aGroup", fs.getFileStatus(file).getGroup());
-    }
-
-    /**
-     * @throws Exception If failed.
-     */
-    public void testSetTimes() throws Exception {
-        Path fsHome = new Path(primaryFsUri);
-        final Path file = new Path(fsHome, "/heartbeat");
-
-        fs.create(file).close();
-
-        FileStatus status = fs.getFileStatus(file);
-
-        assertTrue(status.getAccessTime() > 0);
-        assertTrue(status.getModificationTime() > 0);
-
-        long mtime = System.currentTimeMillis() - 5000;
-        long atime = System.currentTimeMillis() - 4000;
-
-        fs.setTimes(file, mtime, atime);
-
-        status = fs.getFileStatus(file);
-
-        assertEquals(mtime, status.getModificationTime());
-        assertEquals(atime, status.getAccessTime());
-
-        mtime -= 5000;
-
-        fs.setTimes(file, mtime, -1);
-
-        status = fs.getFileStatus(file);
-
-        assertEquals(mtime, status.getModificationTime());
-        assertEquals(atime, status.getAccessTime());
-
-        atime -= 5000;
-
-        fs.setTimes(file, -1, atime);
-
-        status = fs.getFileStatus(file);
-
-        assertEquals(mtime, status.getModificationTime());
-        assertEquals(atime, status.getAccessTime());
-    }
-
-    /**
-     * @throws Exception If failed.
-     */
-    public void testSetOwnerIfOutputStreamIsNotClosed() throws Exception {
-        Path fsHome = new Path(primaryFsUri);
-        Path file = new Path(fsHome, "myFile");
-
-        FSDataOutputStream os = fs.create(file);
-
-        fs.setOwner(file, "aUser", "aGroup");
-
-        os.close();
-
-        assertEquals("aUser", fs.getFileStatus(file).getOwner());
-        assertEquals("aGroup", fs.getFileStatus(file).getGroup());
-    }
-
-    /** @throws Exception If failed. */
-    public void testSetOwnerCheckNonRecursiveness() throws Exception {
-        Path fsHome = new Path(primaryFsUri);
-        Path file = new Path(fsHome, "/tmp/my");
-
-        FSDataOutputStream os = fs.create(file);
-
-        os.close();
-
-        Path tmpDir = new Path(fsHome, "/tmp");
-
-        fs.setOwner(file, "fUser", "fGroup");
-        fs.setOwner(tmpDir, "dUser", "dGroup");
-
-        assertEquals("dUser", fs.getFileStatus(tmpDir).getOwner());
-        assertEquals("dGroup", fs.getFileStatus(tmpDir).getGroup());
-
-        assertEquals("fUser", fs.getFileStatus(file).getOwner());
-        assertEquals("fGroup", fs.getFileStatus(file).getGroup());
-    }
-
-    /** @throws Exception If failed. */
-    public void testOpenCheckParametersPathIsNull() throws Exception {
-        GridTestUtils.assertThrows(log, new Callable<Object>() {
-            @Override public Object call() throws Exception {
-                return fs.open(null, 1024);
-            }
-        }, NullPointerException.class, "Ouch! Argument cannot be null: f");
-    }
-
-    /** @throws Exception If failed. */
-    public void testOpenNoSuchPath() throws Exception {
-        Path fsHome = new Path(primaryFsUri);
-        final Path file = new Path(fsHome, "someFile");
-
-        GridTestUtils.assertThrows(log, new Callable<Object>() {
-            @Override public Object call() throws Exception {
-                return fs.open(file, 1024);
-            }
-        }, FileNotFoundException.class, null);
-    }
-
-    /** @throws Exception If failed. */
-    public void testOpenIfPathIsAlreadyOpened() throws Exception {
-        Path fsHome = new Path(primaryFsUri);
-        Path file = new Path(fsHome, "someFile");
-
-        FSDataOutputStream os = fs.create(file);
-
-        os.close();
-
-        FSDataInputStream is1 = fs.open(file);
-        FSDataInputStream is2 = fs.open(file);
-
-        is1.close();
-        is2.close();
-    }
-
-    /** @throws Exception If failed. */
-    public void testOpen() throws Exception {
-        Path fsHome = new Path(primaryFsUri);
-        Path file = new Path(fsHome, "someFile");
-
-        int cnt = 2 * 1024;
-
-        try (FSDataOutputStream out = fs.create(file, true, 1024)) {
-
-            for (long i = 0; i < cnt; i++)
-                out.writeLong(i);
-        }
-
-        assertEquals(getClientFsUser(), fs.getFileStatus(file).getOwner());
-
-        try (FSDataInputStream in = fs.open(file, 1024)) {
-
-            for (long i = 0; i < cnt; i++)
-                assertEquals(i, in.readLong());
-        }
-    }
-
-    /** @throws Exception If failed. */
-    public void testAppendCheckParametersPathIsNull() throws Exception {
-        GridTestUtils.assertThrows(log, new Callable<Object>() {
-            @Override public Object call() throws Exception {
-                return fs.append(null);
-            }
-        }, NullPointerException.class, "Ouch! Argument cannot be null: f");
-    }
-
-    /** @throws Exception If failed. */
-    public void testAppendIfPathPointsToDirectory() throws Exception {
-        final Path fsHome = new Path(primaryFsUri);
-        final Path dir = new Path(fsHome, "/tmp");
-        Path file = new Path(dir, "my");
-
-        FSDataOutputStream os = fs.create(file);
-
-        os.close();
-
-        GridTestUtils.assertThrowsInherited(log, new Callable<Object>() {
-            @Override public Object call() throws Exception {
-                return fs.append(new Path(fsHome, dir), 1024);
-            }
-        }, IOException.class, null);
-    }
-
-    /** @throws Exception If failed. */
-    public void testAppendIfFileIsAlreadyBeingOpenedToWrite() throws Exception 
{
-        Path fsHome = new Path(primaryFsUri);
-        final Path file = new Path(fsHome, "someFile");
-
-        FSDataOutputStream os = fs.create(file);
-
-        os.close();
-
-        FSDataOutputStream appendOs = fs.append(file);
-
-        GridTestUtils.assertThrows(log, new Callable<Object>() {
-            @Override
-            public Object call() throws Exception {
-                return fs.append(file);
-            }
-        }, IOException.class, null);
-
-        appendOs.close();
-    }
-
-    /** @throws Exception If failed. */
-    public void testAppend() throws Exception {
-        Path fsHome = new Path(primaryFsUri);
-        Path file = new Path(fsHome, "someFile");
-
-        int cnt = 1024;
-
-        FSDataOutputStream out = fs.create(file, true, 1024);
-
-        for (int i = 0; i < cnt; i++)
-            out.writeLong(i);
-
-        out.close();
-
-        out = fs.append(file);
-
-        for (int i = cnt; i < cnt * 2; i++)
-            out.writeLong(i);
-
-        out.close();
-
-        FSDataInputStream in = fs.open(file, 1024);
-
-        for (int i = 0; i < cnt * 2; i++)
-            assertEquals(i, in.readLong());
-
-        in.close();
-    }
-
-    /** @throws Exception If failed. */
-    public void testRenameCheckParametersSrcPathIsNull() throws Exception {
-        Path fsHome = new Path(primaryFsUri);
-        final Path file = new Path(fsHome, "someFile");
-
-        GridTestUtils.assertThrows(log, new Callable<Object>() {
-            @Override public Object call() throws Exception {
-                return fs.rename(null, file);
-            }
-        }, NullPointerException.class, "Ouch! Argument cannot be null: src");
-    }
-
-    /** @throws Exception If failed. */
-    public void testRenameCheckParametersDstPathIsNull() throws Exception {
-        Path fsHome = new Path(primaryFsUri);
-        final Path file = new Path(fsHome, "someFile");
-
-        GridTestUtils.assertThrows(log, new Callable<Object>() {
-            @Override
-            public Object call() throws Exception {
-                return fs.rename(file, null);
-            }
-        }, NullPointerException.class, "Ouch! Argument cannot be null: dst");
-    }
-
-    /** @throws Exception If failed. */
-    public void testRenameIfSrcPathDoesNotExist() throws Exception {
-        Path fsHome = new Path(primaryFsUri);
-        Path srcFile = new Path(fsHome, "srcFile");
-        Path dstFile = new Path(fsHome, "dstFile");
-
-        assertPathDoesNotExist(fs, srcFile);
-
-        assertFalse(fs.rename(srcFile, dstFile));
-
-        assertPathDoesNotExist(fs, dstFile);
-    }
-
-    /** @throws Exception If failed. */
-    public void testRenameIfSrcPathIsAlreadyBeingOpenedToWrite() throws 
Exception {
-        Path fsHome = new Path(primaryFsUri);
-        Path srcFile = new Path(fsHome, "srcFile");
-        Path dstFile = new Path(fsHome, "dstFile");
-
-        FSDataOutputStream os = fs.create(srcFile);
-
-        os.close();
-
-        os = fs.append(srcFile);
-
-        assertTrue(fs.rename(srcFile, dstFile));
-
-        assertPathExists(fs, dstFile);
-
-        String testStr = "Test";
-
-        try {
-            os.writeBytes(testStr);
-        }
-        finally {
-            os.close();
-        }
-
-        try (FSDataInputStream is = fs.open(dstFile)) {
-            byte[] buf = new byte[testStr.getBytes().length];
-
-            is.readFully(buf);
-
-            assertEquals(testStr, new String(buf));
-        }
-    }
-
-    /** @throws Exception If failed. */
-    public void testRenameFileIfDstPathExists() throws Exception {
-        Path fsHome = new Path(primaryFsUri);
-        Path srcFile = new Path(fsHome, "srcFile");
-        Path dstFile = new Path(fsHome, "dstFile");
-
-        FSDataOutputStream os = fs.create(srcFile);
-
-        os.close();
-
-        os = fs.create(dstFile);
-
-        os.close();
-
-        assertFalse(fs.rename(srcFile, dstFile));
-
-        assertPathExists(fs, srcFile);
-        assertPathExists(fs, dstFile);
-    }
-
-    /** @throws Exception If failed. */
-    public void testRenameFile() throws Exception {
-        Path fsHome = new Path(primaryFsUri);
-        Path srcFile = new Path(fsHome, "/tmp/srcFile");
-        Path dstFile = new Path(fsHome, "/tmp/dstFile");
-
-        FSDataOutputStream os = fs.create(srcFile);
-
-        os.close();
-
-        assertTrue(fs.rename(srcFile, dstFile));
-
-        assertPathDoesNotExist(fs, srcFile);
-        assertPathExists(fs, dstFile);
-    }
-
-    /** @throws Exception If failed. */
-    public void testRenameIfSrcPathIsAlreadyBeingOpenedToRead() throws 
Exception {
-        Path fsHome = new Path(primaryFsUri);
-        Path srcFile = new Path(fsHome, "srcFile");
-        Path dstFile = new Path(fsHome, "dstFile");
-
-        FSDataOutputStream os = fs.create(srcFile);
-
-        int cnt = 1024;
-
-        for (int i = 0; i < cnt; i++)
-            os.writeInt(i);
-
-        os.close();
-
-        FSDataInputStream is = fs.open(srcFile);
-
-        for (int i = 0; i < cnt; i++) {
-            if (i == 100)
-                // Rename file during the read process.
-                assertTrue(fs.rename(srcFile, dstFile));
-
-            assertEquals(i, is.readInt());
-        }
-
-        assertPathDoesNotExist(fs, srcFile);
-        assertPathExists(fs, dstFile);
-
-        os.close();
-        is.close();
-    }
-
-    /** @throws Exception If failed. */
-    public void testRenameDirectoryIfDstPathExists() throws Exception {
-        Path fsHome = new Path(primaryFsUri);
-        Path srcDir = new Path(fsHome, "/tmp/");
-        Path dstDir = new Path(fsHome, "/tmpNew/");
-
-        FSDataOutputStream os = fs.create(new Path(srcDir, "file1"));
-
-        os.close();
-
-        os = fs.create(new Path(dstDir, "file2"));
-
-        os.close();
-
-        assertTrue("Rename succeeded [srcDir=" + srcDir + ", dstDir=" + dstDir 
+ ']', fs.rename(srcDir, dstDir));
-
-        assertPathExists(fs, dstDir);
-        assertPathExists(fs, new Path(fsHome, "/tmpNew/tmp"));
-        assertPathExists(fs, new Path(fsHome, "/tmpNew/tmp/file1"));
-    }
-
-    /** @throws Exception If failed. */
-    public void testRenameDirectory() throws Exception {
-        Path fsHome = new Path(primaryFsUri);
-        Path dir = new Path(fsHome, "/tmp/");
-        Path newDir = new Path(fsHome, "/tmpNew/");
-
-        FSDataOutputStream os = fs.create(new Path(dir, "myFile"));
-
-        os.close();
-
-        assertTrue("Rename failed [dir=" + dir + ", newDir=" + newDir + ']', 
fs.rename(dir, newDir));
-
-        assertPathDoesNotExist(fs, dir);
-        assertPathExists(fs, newDir);
-    }
-
-    /** @throws Exception If failed. */
-    public void testListStatusIfPathIsNull() throws Exception {
-        GridTestUtils.assertThrows(log, new Callable<Object>() {
-            @Override public Object call() throws Exception {
-                return fs.listStatus((Path)null);
-            }
-        }, NullPointerException.class, "Ouch! Argument cannot be null: f");
-    }
-
-    /** @throws Exception If failed. */
-    public void testListStatusIfPathDoesNotExist() throws Exception {
-        GridTestUtils.assertThrows(log, new Callable<Object>() {
-                @Override public Object call() throws Exception {
-                    return fs.listStatus(new Path("/tmp/some/dir"));
-                }
-            }, FileNotFoundException.class, null);
-    }
-
-    /**
-     * Test directory listing.
-     *
-     * @throws Exception If failed.
-     */
-    public void testListStatus() throws Exception {
-        Path igfsHome = new Path(PRIMARY_URI);
-
-        // Test listing of an empty directory.
-        Path dir = new Path(igfsHome, "dir");
-
-        assert fs.mkdirs(dir);
-
-        FileStatus[] list = fs.listStatus(dir);
-
-        assert list.length == 0;
-
-        // Test listing of a not empty directory.
-        Path subDir = new Path(dir, "subDir");
-
-        assert fs.mkdirs(subDir);
-
-        Path file = new Path(dir, "file");
-
-        FSDataOutputStream fos = fs.create(file);
-
-        fos.close();
-
-        list = fs.listStatus(dir);
-
-        assert list.length == 2;
-
-        String listRes1 = list[0].getPath().getName();
-        String listRes2 = list[1].getPath().getName();
-
-        assert "subDir".equals(listRes1) && "file".equals(listRes2) || 
"subDir".equals(listRes2) &&
-            "file".equals(listRes1);
-
-        // Test listing of a file.
-        list = fs.listStatus(file);
-
-        assert list.length == 1;
-
-        assert "file".equals(list[0].getPath().getName());
-    }
-
-    /** @throws Exception If failed. */
-    public void testSetWorkingDirectoryIfPathIsNull() throws Exception {
-        fs.setWorkingDirectory(null);
-
-        Path file = new Path("file");
-
-        FSDataOutputStream os = fs.create(file);
-        os.close();
-
-        String path = fs.getFileStatus(file).getPath().toString();
-
-        assertTrue(path.endsWith("/user/" + getClientFsUser() + "/file"));
-    }
-
-    /** @throws Exception If failed. */
-    public void testSetWorkingDirectoryIfPathDoesNotExist() throws Exception {
-        // Should not throw any exceptions.
-        fs.setWorkingDirectory(new Path("/someDir"));
-    }
-
-    /** @throws Exception If failed. */
-    public void testSetWorkingDirectory() throws Exception {
-        Path dir = new Path("/tmp/nested/dir");
-        Path file = new Path("file");
-
-        fs.mkdirs(dir);
-
-        fs.setWorkingDirectory(dir);
-
-        FSDataOutputStream os = fs.create(file);
-        os.close();
-
-        String filePath = fs.getFileStatus(new Path(dir, 
file)).getPath().toString();
-
-        assertTrue(filePath.contains("/tmp/nested/dir/file"));
-    }
-
-    /** @throws Exception If failed. */
-    public void testGetWorkingDirectoryIfDefault() throws Exception {
-        String path = fs.getWorkingDirectory().toString();
-
-        assertTrue(path.endsWith("/user/" + getClientFsUser()));
-    }
-
-    /** @throws Exception If failed. */
-    public void testGetWorkingDirectory() throws Exception {
-        Path dir = new Path("/tmp/some/dir");
-
-        fs.mkdirs(dir);
-
-        fs.setWorkingDirectory(dir);
-
-        String path = fs.getWorkingDirectory().toString();
-
-        assertTrue(path.endsWith("/tmp/some/dir"));
-    }
-
-    /** @throws Exception If failed. */
-    public void testMkdirsIfPathIsNull() throws Exception {
-        GridTestUtils.assertThrows(log, new Callable<Object>() {
-            @Override public Object call() throws Exception {
-                return fs.mkdirs(null);
-            }
-        }, NullPointerException.class, "Ouch! Argument cannot be null: f");
-    }
-
-    /** @throws Exception If failed. */
-    public void testMkdirsIfPermissionIsNull() throws Exception {
-        Path dir = new Path("/tmp");
-
-        assertTrue(fs.mkdirs(dir, null));
-
-        assertEquals(FsPermission.getDefault(), 
fs.getFileStatus(dir).getPermission());
-    }
-
-    /** @throws Exception If failed. */
-    @SuppressWarnings("OctalInteger")
-    public void testMkdirs() throws Exception {
-        Path fsHome = new Path(PRIMARY_URI);
-        final Path dir = new Path(fsHome, "/tmp/staging");
-        final Path nestedDir = new Path(dir, "nested");
-
-        final FsPermission dirPerm = FsPermission.createImmutable((short)0700);
-        final FsPermission nestedDirPerm = 
FsPermission.createImmutable((short)111);
-
-        assertTrue(fs.mkdirs(dir, dirPerm));
-        assertTrue(fs.mkdirs(nestedDir, nestedDirPerm));
-
-        assertEquals(dirPerm, fs.getFileStatus(dir).getPermission());
-        assertEquals(nestedDirPerm, 
fs.getFileStatus(nestedDir).getPermission());
-
-        assertEquals(getClientFsUser(), fs.getFileStatus(dir).getOwner());
-        assertEquals(getClientFsUser(), 
fs.getFileStatus(nestedDir).getOwner());
-    }
-
-    /** @throws Exception If failed. */
-    public void testGetFileStatusIfPathIsNull() throws Exception {
-        GridTestUtils.assertThrows(log, new Callable<Object>() {
-            @Override public Object call() throws Exception {
-                return fs.getFileStatus(null);
-            }
-        }, NullPointerException.class, "Ouch! Argument cannot be null: f");
-    }
-
-    /** @throws Exception If failed. */
-    public void testGetFileStatusIfPathDoesNotExist() throws Exception {
-        GridTestUtils.assertThrows(log, new Callable<Object>() {
-            @Override public Object call() throws Exception {
-                return fs.getFileStatus(new Path("someDir"));
-            }
-        }, FileNotFoundException.class, "File not found: someDir");
-    }
-
-    /** @throws Exception If failed. */
-    public void testGetFileBlockLocationsIfFileStatusIsNull() throws Exception 
{
-        GridTestUtils.assertThrows(log, new Callable<Object>() {
-            @Override public Object call() throws Exception {
-                // Argument is checked by Hadoop.
-                return fs.getFileBlockLocations((Path)null, 1, 2);
-            }
-        }, NullPointerException.class, null);
-    }
-
-    /** @throws Exception If failed. */
-    public void 
testGetFileBlockLocationsIfFileStatusReferenceNotExistingPath() throws 
Exception {
-        Path path = new Path("someFile");
-
-        fs.create(path).close();
-
-        final FileStatus status = fs.getFileStatus(path);
-
-        fs.delete(path, true);
-
-        BlockLocation[] locations = fs.getFileBlockLocations(status, 1, 2);
-
-        assertEquals(0, locations.length);
-    }
-
-    /** @throws Exception If failed. */
-    public void testGetFileBlockLocations() throws Exception {
-        Path igfsHome = new Path(PRIMARY_URI);
-
-        Path file = new Path(igfsHome, "someFile");
-
-        try (OutputStream out = new BufferedOutputStream(fs.create(file, true, 
1024 * 1024))) {
-            byte[] data = new byte[128 * 1024];
-
-            for (int i = 0; i < 100; i++)
-                out.write(data);
-
-            out.flush();
-        }
-
-        try (FSDataInputStream in = fs.open(file, 1024 * 1024)) {
-            byte[] data = new byte[128 * 1024];
-
-            int read;
-
-            do {
-                read = in.read(data);
-            }
-            while (read > 0);
-        }
-
-        FileStatus status = fs.getFileStatus(file);
-
-        int grpLen = 128 * 512 * 1024;
-
-        int grpCnt = (int)((status.getLen() + grpLen - 1) / grpLen);
-
-        BlockLocation[] locations = fs.getFileBlockLocations(status, 0, 
status.getLen());
-
-        assertEquals(grpCnt, locations.length);
-    }
-
-    /** @throws Exception If failed. */
-    @SuppressWarnings("deprecation")
-    public void testGetDefaultBlockSize() throws Exception {
-        assertEquals(1L << 26, fs.getDefaultBlockSize());
-    }
-
-    /** @throws Exception If failed. */
-    public void testZeroReplicationFactor() throws Exception {
-        // This test doesn't make sense for any mode except of PRIMARY.
-        if (mode == PRIMARY) {
-            Path igfsHome = new Path(PRIMARY_URI);
-
-            Path file = new Path(igfsHome, "someFile");
-
-            try (FSDataOutputStream out = fs.create(file, (short)0)) {
-                out.write(new byte[1024 * 1024]);
-            }
-
-            IgniteFileSystem igfs = grid(0).fileSystem("igfs");
-
-            IgfsPath filePath = new IgfsPath("/someFile");
-
-            IgfsFile fileInfo = igfs.info(filePath);
-
-            awaitPartitionMapExchange();
-
-            Collection<IgfsBlockLocation> locations = igfs.affinity(filePath, 
0, fileInfo.length());
-
-            assertEquals(1, locations.size());
-
-            IgfsBlockLocation location = F.first(locations);
-
-            assertEquals(1, location.nodeIds().size());
-        }
-    }
-
-    /**
-     * Ensure that when running in multithreaded mode only one create() 
operation succeed.
-     *
-     * @throws Exception If failed.
-     */
-    public void testMultithreadedCreate() throws Exception {
-        Path dir = new Path(new Path(PRIMARY_URI), "/dir");
-
-        assert fs.mkdirs(dir);
-
-        final Path file = new Path(dir, "file");
-
-        fs.create(file).close();
-
-        final AtomicInteger cnt = new AtomicInteger();
-
-        final Collection<Integer> errs = new 
GridConcurrentHashSet<>(THREAD_CNT, 1.0f, THREAD_CNT);
-
-        final AtomicBoolean err = new AtomicBoolean();
-
-        multithreaded(new Runnable() {
-            @Override
-            public void run() {
-                int idx = cnt.getAndIncrement();
-
-                byte[] data = new byte[256];
-
-                Arrays.fill(data, (byte)idx);
-
-                FSDataOutputStream os = null;
-
-                try {
-                    os = fs.create(file, true);
-                }
-                catch (IOException ignore) {
-                    errs.add(idx);
-                }
-
-                U.awaitQuiet(barrier);
-
-                try {
-                    if (os != null)
-                        os.write(data);
-                }
-                catch (IOException ignore) {
-                    err.set(true);
-                }
-                finally {
-                    U.closeQuiet(os);
-                }
-            }
-        }, THREAD_CNT);
-
-        assert !err.get();
-
-        // Only one thread could obtain write lock on the file.
-        assert errs.size() == THREAD_CNT - 1;
-
-        int idx = -1;
-
-        for (int i = 0; i < THREAD_CNT; i++) {
-            if (!errs.remove(i)) {
-                idx = i;
-
-                break;
-            }
-        }
-
-        byte[] expData = new byte[256];
-
-        Arrays.fill(expData, (byte)idx);
-
-        FSDataInputStream is = fs.open(file);
-
-        byte[] data = new byte[256];
-
-        is.read(data);
-
-        is.close();
-
-        assert Arrays.equals(expData, data) : "Expected=" + 
Arrays.toString(expData) + ", actual=" +
-            Arrays.toString(data);
-    }
-
-    /**
-     * Ensure that when running in multithreaded mode only one append() 
operation succeed.
-     *
-     * @throws Exception If failed.
-     */
-    public void testMultithreadedAppend() throws Exception {
-        Path dir = new Path(new Path(PRIMARY_URI), "/dir");
-
-        assert fs.mkdirs(dir);
-
-        final Path file = new Path(dir, "file");
-
-        fs.create(file).close();
-
-        final AtomicInteger cnt = new AtomicInteger();
-
-        final Collection<Integer> errs = new 
GridConcurrentHashSet<>(THREAD_CNT, 1.0f, THREAD_CNT);
-
-        final AtomicBoolean err = new AtomicBoolean();
-
-        multithreaded(new Runnable() {
-            @Override public void run() {
-                int idx = cnt.getAndIncrement();
-
-                byte[] data = new byte[256];
-
-                Arrays.fill(data, (byte)idx);
-
-                U.awaitQuiet(barrier);
-
-                FSDataOutputStream os = null;
-
-                try {
-                    os = fs.append(file);
-                }
-                catch (IOException ignore) {
-                    errs.add(idx);
-                }
-
-                U.awaitQuiet(barrier);
-
-                try {
-                    if (os != null)
-                        os.write(data);
-                }
-                catch (IOException ignore) {
-                    err.set(true);
-                }
-                finally {
-                    U.closeQuiet(os);
-                }
-            }
-        }, THREAD_CNT);
-
-        assert !err.get();
-
-        // Only one thread could obtain write lock on the file.
-        assert errs.size() == THREAD_CNT - 1;
-
-        int idx = -1;
-
-        for (int i = 0; i < THREAD_CNT; i++) {
-            if (!errs.remove(i)) {
-                idx = i;
-
-                break;
-            }
-        }
-
-        byte[] expData = new byte[256];
-
-        Arrays.fill(expData, (byte)idx);
-
-        FSDataInputStream is = fs.open(file);
-
-        byte[] data = new byte[256];
-
-        is.read(data);
-
-        is.close();
-
-        assert Arrays.equals(expData, data);
-    }
-
-    /**
-     * Test concurrent reads within the file.
-     *
-     * @throws Exception If failed.
-     */
-    public void testMultithreadedOpen() throws Exception {
-        final byte[] dataChunk = new byte[256];
-
-        for (int i = 0; i < dataChunk.length; i++)
-            dataChunk[i] = (byte)i;
-
-        Path dir = new Path(new Path(PRIMARY_URI), "/dir");
-
-        assert fs.mkdirs(dir);
-
-        final Path file = new Path(dir, "file");
-
-        FSDataOutputStream os = fs.create(file);
-
-        // Write 256 * 2048 = 512Kb of data.
-        for (int i = 0; i < 2048; i++)
-            os.write(dataChunk);
-
-        os.close();
-
-        final AtomicBoolean err = new AtomicBoolean();
-
-        multithreaded(new Runnable() {
-            @Override
-            public void run() {
-                FSDataInputStream is = null;
-
-                try {
-                    int pos = ThreadLocalRandom8.current().nextInt(2048);
-
-                    try {
-                        is = fs.open(file);
-                    }
-                    finally {
-                        U.awaitQuiet(barrier);
-                    }
-
-                    is.seek(256 * pos);
-
-                    byte[] buf = new byte[256];
-
-                    for (int i = pos; i < 2048; i++) {
-                        // First perform normal read.
-                        int read = is.read(buf);
-
-                        assert read == 256;
-
-                        Arrays.equals(dataChunk, buf);
-                    }
-
-                    int res = is.read(buf);
-
-                    assert res == -1;
-                }
-                catch (IOException ignore) {
-                    err.set(true);
-                }
-                finally {
-                    U.closeQuiet(is);
-                }
-            }
-        }, THREAD_CNT);
-
-        assert !err.get();
-    }
-
-    /**
-     * Test concurrent creation of multiple directories.
-     *
-     * @throws Exception If failed.
-     */
-    public void testMultithreadedMkdirs() throws Exception {
-        final Path dir = new Path(new Path(PRIMARY_URI), "/dir");
-
-        assert fs.mkdirs(dir);
-
-        final int depth = 3;
-        final int entryCnt = 5;
-
-        final AtomicReference<IOException> err = new AtomicReference();
-
-        multithreaded(new Runnable() {
-            @Override public void run() {
-                Deque<IgniteBiTuple<Integer, Path>> queue = new ArrayDeque<>();
-
-                queue.add(F.t(0, dir));
-
-                U.awaitQuiet(barrier);
-
-                while (!queue.isEmpty()) {
-                    IgniteBiTuple<Integer, Path> t = queue.pollFirst();
-
-                    int curDepth = t.getKey();
-                    Path curPath = t.getValue();
-
-                    if (curDepth <= depth) {
-                        int newDepth = curDepth + 1;
-
-                        // Create directories.
-                        for (int i = 0; i < entryCnt; i++) {
-                            Path subDir = new Path(curPath, "dir-" + newDepth 
+ "-" + i);
-
-                            try {
-                                if (fs.mkdirs(subDir))
-                                    queue.addLast(F.t(newDepth, subDir));
-                            }
-                            catch (IOException e) {
-                                err.compareAndSet(null, e);
-                            }
-                        }
-                    }
-                }
-            }
-        }, THREAD_CNT);
-
-        // Ensure there were no errors.
-        assert err.get() == null : err.get();
-
-        // Ensure correct folders structure.
-        Deque<IgniteBiTuple<Integer, Path>> queue = new ArrayDeque<>();
-
-        queue.add(F.t(0, dir));
-
-        while (!queue.isEmpty()) {
-            IgniteBiTuple<Integer, Path> t = queue.pollFirst();
-
-            int curDepth = t.getKey();
-            Path curPath = t.getValue();
-
-            if (curDepth <= depth) {
-                int newDepth = curDepth + 1;
-
-                // Create directories.
-                for (int i = 0; i < entryCnt; i++) {
-                    Path subDir = new Path(curPath, "dir-" + newDepth + "-" + 
i);
-
-                    assert fs.exists(subDir) : "Expected directory doesn't 
exist: " + subDir;
-
-                    queue.add(F.t(newDepth, subDir));
-                }
-            }
-        }
-    }
-
-    /**
-     * Test concurrent deletion of the same directory with advanced structure.
-     *
-     * @throws Exception If failed.
-     */
-    @SuppressWarnings("TooBroadScope")
-    public void testMultithreadedDelete() throws Exception {
-        final Path dir = new Path(new Path(PRIMARY_URI), "/dir");
-
-        assert fs.mkdirs(dir);
-
-        int depth = 3;
-        int entryCnt = 5;
-
-        Deque<IgniteBiTuple<Integer, Path>> queue = new ArrayDeque<>();
-
-        queue.add(F.t(0, dir));
-
-        while (!queue.isEmpty()) {
-            IgniteBiTuple<Integer, Path> t = queue.pollFirst();
-
-            int curDepth = t.getKey();
-            Path curPath = t.getValue();
-
-            if (curDepth < depth) {
-                int newDepth = curDepth + 1;
-
-                // Create directories.
-                for (int i = 0; i < entryCnt; i++) {
-                    Path subDir = new Path(curPath, "dir-" + newDepth + "-" + 
i);
-
-                    fs.mkdirs(subDir);
-
-                    queue.addLast(F.t(newDepth, subDir));
-                }
-            }
-            else {
-                // Create files.
-                for (int i = 0; i < entryCnt; i++) {
-                    Path file = new Path(curPath, "file " + i);
-
-                    fs.create(file).close();
-                }
-            }
-        }
-
-        final AtomicBoolean err = new AtomicBoolean();
-
-        multithreaded(new Runnable() {
-            @Override public void run() {
-                try {
-                    U.awaitQuiet(barrier);
-
-                    fs.delete(dir, true);
-                }
-                catch (IOException ignore) {
-                    err.set(true);
-                }
-            }
-        }, THREAD_CNT);
-
-        // Ensure there were no errors.
-        assert !err.get();
-
-        // Ensure the directory was actually deleted.
-
-        assert GridTestUtils.waitForCondition(new GridAbsPredicate() {
-            @Override public boolean apply() {
-                try {
-                    return !fs.exists(dir);
-                }
-                catch (IOException e) {
-                    throw new AssertionError(e);
-                }
-            }
-        }, 5000L);
-    }
-
-    /** @throws Exception If failed. */
-    public void testConsistency() throws Exception {
-        // Default buffers values
-        checkConsistency(-1, 1, -1, -1, 1, -1);
-        checkConsistency(-1, 10, -1, -1, 10, -1);
-        checkConsistency(-1, 100, -1, -1, 100, -1);
-        checkConsistency(-1, 1000, -1, -1, 1000, -1);
-        checkConsistency(-1, 10000, -1, -1, 10000, -1);
-        checkConsistency(-1, 100000, -1, -1, 100000, -1);
-
-        checkConsistency(65 * 1024 + 13, 100000, -1, -1, 100000, -1);
-
-        checkConsistency(-1, 100000, 2 * 4 * 1024 + 17, -1, 100000, -1);
-
-        checkConsistency(-1, 100000, -1, 65 * 1024 + 13, 100000, -1);
-
-        checkConsistency(-1, 100000, -1, -1, 100000, 2 * 4 * 1024 + 17);
-
-        checkConsistency(65 * 1024 + 13, 100000, 2 * 4 * 1024 + 13, 65 * 1024 
+ 149, 100000, 2 * 4 * 1024 + 157);
-    }
-
-    /**
-     * Verifies that client reconnects after connection to the server has been 
lost.
-     *
-     * @throws Exception If error occurs.
-     */
-    public void testClientReconnect() throws Exception {
-        Path filePath = new Path(PRIMARY_URI, "file1");
-
-        final FSDataOutputStream s = fs.create(filePath); // Open the stream 
before stopping IGFS.
-
-        try {
-            G.stopAll(true); // Stop the server.
-
-            startNodes(); // Start server again.
-
-            // Check that client is again operational.
-            assertTrue(fs.mkdirs(new Path(PRIMARY_URI, "dir1/dir2")));
-
-            // However, the streams, opened before disconnect, should not be 
valid.
-            GridTestUtils.assertThrows(log, new Callable<Object>() {
-                @Nullable @Override public Object call() throws Exception {
-                    s.write("test".getBytes());
-
-                    s.flush(); // Flush data to the broken output stream.
-
-                    return null;
-                }
-            }, IOException.class, null);
-
-            assertFalse(fs.exists(filePath));
-        }
-        finally {
-            U.closeQuiet(s); // Safety.
-        }
-    }
-
-    /**
-     * Verifies that client reconnects after connection to the server has been 
lost (multithreaded mode).
-     *
-     * @throws Exception If error occurs.
-     */
-    public void testClientReconnectMultithreaded() throws Exception {
-        final ConcurrentLinkedQueue<FileSystem> q = new 
ConcurrentLinkedQueue<>();
-
-        Configuration cfg = new Configuration();
-
-        for (Map.Entry<String, String> entry : primaryFsCfg)
-            cfg.set(entry.getKey(), entry.getValue());
-
-        cfg.setBoolean("fs.igfs.impl.disable.cache", true);
-
-        final int nClients = 1;
-
-        // Initialize clients.
-        for (int i = 0; i < nClients; i++)
-            q.add(FileSystem.get(primaryFsUri, cfg));
-
-        G.stopAll(true); // Stop the server.
-
-        startNodes(); // Start server again.
-
-        GridTestUtils.runMultiThreaded(new Callable<Object>() {
-            @Override public Object call() throws Exception {
-                FileSystem fs = q.poll();
-
-                try {
-                    // Check that client is again operational.
-                    assertTrue(fs.mkdirs(new Path("/" + 
Thread.currentThread().getName())));
-
-                    return true;
-                }
-                finally {
-                    U.closeQuiet(fs);
-                }
-            }
-        }, nClients, "test-client");
-    }
-
-    /**
-     * Checks consistency of create --> open --> append --> open operations 
with different buffer sizes.
-     *
-     * @param createBufSize Buffer size used for file creation.
-     * @param writeCntsInCreate Count of times to write in file creation.
-     * @param openAfterCreateBufSize Buffer size used for file opening after 
creation.
-     * @param appendBufSize Buffer size used for file appending.
-     * @param writeCntsInAppend Count of times to write in file appending.
-     * @param openAfterAppendBufSize Buffer size used for file opening after 
appending.
-     * @throws Exception If failed.
-     */
-    private void checkConsistency(int createBufSize, int writeCntsInCreate, 
int openAfterCreateBufSize,
-        int appendBufSize, int writeCntsInAppend, int openAfterAppendBufSize) 
throws Exception {
-        final Path igfsHome = new Path(PRIMARY_URI);
-
-        Path file = new Path(igfsHome, "/someDir/someInnerDir/someFile");
-
-        FSDataOutputStream os = fs.create(file, true, createBufSize);
-
-        for (int i = 0; i < writeCntsInCreate; i++)
-            os.writeInt(i);
-
-        os.close();
-
-        FSDataInputStream is = fs.open(file, openAfterCreateBufSize);
-
-        for (int i = 0; i < writeCntsInCreate; i++)
-            assertEquals(i, is.readInt());
-
-        is.close();
-
-        os = fs.append(file, appendBufSize);
-
-        for (int i = writeCntsInCreate; i < writeCntsInCreate + 
writeCntsInAppend; i++)
-            os.writeInt(i);
-
-        os.close();
-
-        is = fs.open(file, openAfterAppendBufSize);
-
-        for (int i = 0; i < writeCntsInCreate + writeCntsInAppend; i++)
-            assertEquals(i, is.readInt());
-
-        is.close();
-    }
-
-    /**
-     * Gets instance of Hadoop local file system.
-     *
-     * @param home File system home.
-     * @return File system.
-     * @throws IOException If failed.
-     */
-    private FileSystem local(Path home) throws IOException {
-        Configuration cfg = new Configuration();
-
-        cfg.addResource(U.resolveIgniteUrl(HADOOP_FS_CFG));
-
-        return FileSystem.get(home.toUri(), cfg);
-    }
-
-    /**
-     * Copy files from one FS to another.
-     *
-     * @param msg Info message to display after copying finishes.
-     * @param srcFs Source file system.
-     * @param src Source path to copy from.
-     * @param destFs Destination file system.
-     * @param dest Destination path to copy to.
-     * @throws IOException If failed.
-     */
-    private void copy(String msg, FileSystem srcFs, Path src, FileSystem 
destFs, Path dest) throws IOException {
-        assert destFs.delete(dest, true) || !destFs.exists(dest) : "Failed to 
remove: " + dest;
-
-        destFs.mkdirs(dest);
-
-        Configuration conf = new Configuration(true);
-
-        long time = System.currentTimeMillis();
-
-        FileUtil.copy(srcFs, src, destFs, dest, false, true, conf);
-
-        time = System.currentTimeMillis() - time;
-
-        info("Copying finished, " + msg + " [time=" + time + "ms, src=" + src 
+ ", dest=" + dest + ']');
-    }
-
-    /**
-     * Compare content of two folders.
-     *
-     * @param cfg Paths configuration to compare.
-     * @throws IOException If failed.
-     */
-    @SuppressWarnings("deprecation")
-    private void compareContent(Config cfg) throws IOException {
-        Deque<Config> queue = new LinkedList<>();
-
-        queue.add(cfg);
-
-        for (Config c = queue.poll(); c != null; c = queue.poll()) {
-            boolean exists;
-
-            assertEquals("Check existence [src=" + c.src + ", dest=" + c.dest 
+ ']',
-                exists = c.srcFs.exists(c.src), c.destFs.exists(c.dest));
-
-            assertEquals("Check types (files?) [src=" + c.src + ", dest=" + 
c.dest + ']',
-                c.srcFs.isFile(c.src), c.destFs.isFile(c.dest));
-
-            if (exists) {
-                ContentSummary srcSummary = c.srcFs.getContentSummary(c.src);
-                ContentSummary dstSummary = c.destFs.getContentSummary(c.dest);
-
-                assertEquals("Directories number comparison failed",
-                    srcSummary.getDirectoryCount(), 
dstSummary.getDirectoryCount());
-
-                assertEquals("Files number comparison failed",
-                    srcSummary.getFileCount(), dstSummary.getFileCount());
-
-                assertEquals("Space consumed comparison failed",
-                    srcSummary.getSpaceConsumed(), 
dstSummary.getSpaceConsumed());
-
-                assertEquals("Length comparison failed",
-                    srcSummary.getLength(), dstSummary.getLength());
-
-                // Intentionally skipping quotas checks as they can vary.
-            }
-            else {
-                assertContentSummaryFails(c.srcFs, c.src);
-                assertContentSummaryFails(c.destFs, c.dest);
-            }
-
-            if (!exists)
-                continue;
-
-            FileStatus[] srcSt = c.srcFs.listStatus(c.src);
-            FileStatus[] destSt = c.destFs.listStatus(c.dest);
-
-            assert srcSt != null && destSt != null : "Both not null" +
-                " [srcSt=" + Arrays.toString(srcSt) + ", destSt=" + 
Arrays.toString(destSt) + ']';
-
-            assertEquals("Check listing [src=" + c.src + ", dest=" + c.dest + 
']', srcSt.length, destSt.length);
-
-            // Listing of the file returns the only element with this file.
-            if (srcSt.length == 1 && c.src.equals(srcSt[0].getPath())) {
-                assertEquals(c.dest, destSt[0].getPath());
-
-                assertTrue("Expects file [src=" + c.src + ", srcSt[0]=" + 
srcSt[0] + ']', !srcSt[0].isDir());
-                assertTrue("Expects file [dest=" + c.dest + ", destSt[0]=" + 
destSt[0] + ']', !destSt[0].isDir());
-
-                FSDataInputStream srcIn = null;
-                FSDataInputStream destIn = null;
-
-                try {
-                    srcIn = c.srcFs.open(c.src);
-                    destIn = c.destFs.open(c.dest);
-
-                    GridTestIoUtils.assertEqualStreams(srcIn, destIn, 
srcSt[0].getLen());
-                }
-                finally {
-                    U.closeQuiet(srcIn);
-                    U.closeQuiet(destIn);
-                }
-
-                continue; // Skip the following directories validations.
-            }
-
-            // Sort both arrays.
-            Arrays.sort(srcSt, STATUS_COMPARATOR);
-            Arrays.sort(destSt, STATUS_COMPARATOR);
-
-            for (int i = 0; i < srcSt.length; i++)
-                // Dig in deep to the last leaf, instead of collecting full 
tree in memory.
-                queue.addFirst(new Config(c.srcFs, srcSt[i].getPath(), 
c.destFs, destSt[i].getPath()));
-
-            // Add non-existent file to check in the current folder.
-            String rndFile = "Non-existent file #" + 
UUID.randomUUID().toString();
-
-            queue.addFirst(new Config(c.srcFs, new Path(c.src, rndFile), 
c.destFs, new Path(c.dest, rndFile)));
-        }
-    }
-
-    /**
-     * Test expected failures for 'close' operation.
-     *
-     * @param fs File system to test.
-     * @param msg Expected exception message.
-     */
-    public void assertCloseFails(final FileSystem fs, String msg) {
-        GridTestUtils.assertThrows(log, new Callable() {
-            @Override public Object call() throws Exception {
-                fs.close();
-
-                return null;
-            }
-        }, IOException.class, msg);
-    }
-
-    /**
-     * Test expected failures for 'get content summary' operation.
-     *
-     * @param fs File system to test.
-     * @param path Path to evaluate content summary for.
-     */
-    private void assertContentSummaryFails(final FileSystem fs, final Path 
path) {
-        GridTestUtils.assertThrows(log, new Callable<ContentSummary>() {
-            @Override public ContentSummary call() throws Exception {
-                return fs.getContentSummary(path);
-            }
-        }, FileNotFoundException.class, null);
-    }
-
-    /**
-     * Assert that a given path exists in a given FileSystem.
-     *
-     * @param fs FileSystem to check.
-     * @param p Path to check.
-     * @throws IOException if the path does not exist.
-     */
-    private void assertPathExists(FileSystem fs, Path p) throws IOException {
-        FileStatus fileStatus = fs.getFileStatus(p);
-
-        assertEquals(p, fileStatus.getPath());
-        assertNotSame(0, fileStatus.getModificationTime());
-    }
-
-    /**
-     * Check path does not exist in a given FileSystem.
-     *
-     * @param fs FileSystem to check.
-     * @param path Path to check.
-     */
-    private void assertPathDoesNotExist(final FileSystem fs, final Path path) {
-        GridTestUtils.assertThrows(log, new Callable<Object>() {
-            @Override public Object call() throws Exception {
-                return fs.getFileStatus(path);
-            }
-        }, FileNotFoundException.class, null);
-    }
-
-    /** Helper class to encapsulate source and destination folders. */
-    @SuppressWarnings({"PublicInnerClass", "PublicField"})
-    public static final class Config {
-        /** Source file system. */
-        public final FileSystem srcFs;
-
-        /** Source path to work with. */
-        public final Path src;
-
-        /** Destination file system. */
-        public final FileSystem destFs;
-
-        /** Destination path to work with. */
-        public final Path dest;
-
-        /**
-         * Copying task configuration.
-         *
-         * @param srcFs Source file system.
-         * @param src Source path.
-         * @param destFs Destination file system.
-         * @param dest Destination path.
-         */
-        public Config(FileSystem srcFs, Path src, FileSystem destFs, Path 
dest) {
-            this.srcFs = srcFs;
-            this.src = src;
-            this.destFs = destFs;
-            this.dest = dest;
-        }
-    }
-
-    /**
-     * Convert path for exception message testing purposes.
-     *
-     * @param path Path.
-     * @return Converted path.
-     * @throws Exception If failed.
-     */
-    private Path convertPath(Path path) throws Exception {
-        if (mode != PROXY)
-            return path;
-        else {
-            URI secondaryUri = new URI(SECONDARY_URI);
-
-            URI pathUri = path.toUri();
-
-            return new Path(new URI(pathUri.getScheme() != null ? 
secondaryUri.getScheme() : null,
-                pathUri.getAuthority() != null ? secondaryUri.getAuthority() : 
null, pathUri.getPath(), null, null));
-        }
-    }
-
-    /**
-     * Create configuration for test.
-     *
-     * @param authority Authority.
-     * @param skipEmbed Whether to skip embedded mode.
-     * @param skipLocShmem Whether to skip local shmem mode.
-     * @return Configuration.
-     */
-    private static Configuration configuration(String authority, boolean 
skipEmbed, boolean skipLocShmem) {
-        Configuration cfg = new Configuration();
-
-        cfg.set("fs.defaultFS", "igfs://" + authority + "/");
-        cfg.set("fs.igfs.impl", IgniteHadoopFileSystem.class.getName());
-        cfg.set("fs.AbstractFileSystem.igfs.impl",
-            
org.apache.ignite.hadoop.fs.v2.IgniteHadoopFileSystem.class.getName());
-
-        cfg.setBoolean("fs.igfs.impl.disable.cache", true);
-
-        if (skipEmbed)
-            
cfg.setBoolean(String.format(HadoopIgfsUtils.PARAM_IGFS_ENDPOINT_NO_EMBED, 
authority), true);
-
-        if (skipLocShmem)
-            
cfg.setBoolean(String.format(HadoopIgfsUtils.PARAM_IGFS_ENDPOINT_NO_LOCAL_SHMEM,
 authority), true);
-
-        return cfg;
-    }
-}
\ No newline at end of file

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