/**
 * 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.hadoop.fs.shell;

import static org.junit.Assert.*;
import static org.mockito.Matchers.eq;
import static org.mockito.Mockito.*;

import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;

import org.apache.hadoop.fs.Path;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.FilterFileSystem;
import org.apache.hadoop.fs.PathExistsException;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;

public class TestMove {
  static Configuration conf;
  static FileSystem mockFs;
 
  @BeforeClass
  public static void setup() throws IOException, URISyntaxException {
    mockFs = mock(FileSystem.class);
    conf = new Configuration();
    conf.setClass("fs.mockfs.impl", MockFileSystem.class, FileSystem.class);
  }
    
  @Before
  public void resetMock() throws IOException {
    reset(mockFs);
  }
    
  @Test
  public void testMoveTargetExistsWithoutExplicitRename() throws Exception {
    Path srcPath = new Path("mockfs:/file");
    Path targetPath = new Path("mockfs:/fold0");
    Path dupPath = new Path("mockfs:/fold0/file");
    Path srcPath2 = new Path("mockfs://user/file");
    Path targetPath2 = new Path("mockfs://user/fold0");
    Path dupPath2 = new Path("mockfs://user/fold0/file");
    InstrumentedRenameCommand cmd;
    String[] cmdargs = new String[]{"mockfs:/file", "mockfs:/fold0"};
    FileStatus src_fileStat, target_fileStat, dup_fileStat;
    URI myuri; 
    
    src_fileStat = mock(FileStatus.class);
    target_fileStat = mock(FileStatus.class);
    dup_fileStat = mock(FileStatus.class);
    myuri = new URI("mockfs://user");
      
    when(src_fileStat.isDirectory()).thenReturn(false);
    when(target_fileStat.isDirectory()).thenReturn(true);
    when(dup_fileStat.isDirectory()).thenReturn(false);
    when(src_fileStat.getPath()).thenReturn(srcPath2);
    when(target_fileStat.getPath()).thenReturn(targetPath2);
    when(dup_fileStat.getPath()).thenReturn(dupPath2);
    when(mockFs.getFileStatus(eq(srcPath))).thenReturn(src_fileStat);
    when(mockFs.getFileStatus(eq(targetPath))).thenReturn(target_fileStat);
    when(mockFs.getFileStatus(eq(dupPath))).thenReturn(dup_fileStat);
    when(mockFs.getFileStatus(eq(srcPath2))).thenReturn(src_fileStat);
    when(mockFs.getFileStatus(eq(targetPath2))).thenReturn(target_fileStat);
    when(mockFs.getFileStatus(eq(dupPath2))).thenReturn(dup_fileStat);
    when(mockFs.getUri()).thenReturn(myuri);
        
    cmd = new InstrumentedRenameCommand();
    cmd.setConf(conf);
    cmd.setOverwrite(true);    
    cmd.run(cmdargs);
    
    // make sure command failed with the proper exception
    assertTrue("Rename should have failed with path exists exception",
                         cmd.error instanceof PathExistsException);
  }
    
  static class MockFileSystem extends FilterFileSystem {
    Configuration conf;
    MockFileSystem() {
      super(mockFs);
    }
    @Override
    public void initialize(URI uri, Configuration conf) {
      this.conf = conf;
    }
    @Override
    public Path makeQualified(Path path) {
      return path;
    }
    @Override
    public Configuration getConf() {
      return conf;
    }
  }
    
  private static class InstrumentedRenameCommand extends MoveCommands.Rename {
    private Exception error = null;
    @Override
    public void displayError(Exception e) {
      error = e;
    }
  }
}