Package org.apache.wicket.util.resource

Source Code of org.apache.wicket.util.resource.PathTest

/*
* 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.wicket.util.resource;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.Charset;
import java.util.Arrays;

import org.apache.wicket.WicketTestCase;
import org.apache.wicket.util.file.Path;
import org.junit.Test;

public class PathTest extends WicketTestCase
{

  @Test
  public void loadFromRootUsingSubpathInFilename() throws Exception
  {
    final String contents = PathTest.class.getName() + ": loaded from root";
    final File file = createTempFile(contents);
    final File root = findRoot(file);
    final Path path = new Path(root.getCanonicalPath());
    String relative = root.toURI().relativize(file.toURI()).getPath();
    IResourceStream rs = path.find(PathTest.class, relative);
    assertNotNull(rs);
    assertContents(contents, rs);
  }

  public static void assertContents(String expectedContents, IResourceStream rs)
    throws ResourceStreamNotFoundException, IOException
  {
    InputStream in = rs.getInputStream();
    try
    {
      final byte[] expectedBytes = expectedContents.getBytes(Charset.defaultCharset());
      final int expectedLength = expectedBytes.length;
      byte[] buf = new byte[expectedLength * 2];
      int read = in.read(buf, 0, buf.length);
      assertEquals("contents do not match", expectedLength, read);
      byte[] buf2 = new byte[expectedLength];
      System.arraycopy(buf, 0, buf2, 0, expectedLength);
      assertTrue("contents do not match", Arrays.equals(expectedBytes, buf2));
    }
    finally
    {
      in.close();
    }
  }

  @Test
  public void loadFilenameFromPath() throws Exception
  {
    final String contents = PathTest.class.getName() + ": loaded from prefix";
    final File file = createTempFile(contents);
    final File parent = file.getParentFile();
    final Path path = new Path(parent.getCanonicalPath());
    IResourceStream rs = path.find(PathTest.class, file.getName());
    assertNotNull(rs);
    assertContents(contents, rs);
  }

  public static File createTempFile(String contents) throws IOException
  {
    FileOutputStream out = null;
    try
    {
      File tmp = File.createTempFile("temp", "temp");
      tmp.deleteOnExit();
      out = new FileOutputStream(tmp);
      out.write(contents.getBytes(Charset.defaultCharset()));
      return tmp;
    }
    finally
    {
      if (out != null)
      {
        out.close();
      }
    }
  }

  public static File findRoot(File file)
  {
    final File parent = file.getParentFile();
    if (parent == null)
    {
      return file;
    }
    else
    {
      return findRoot(parent);
    }
  }
}
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