testrandomaccessstream.java

来自「This is a resource based on j2me embedde」· Java 代码 · 共 128 行

/*
 *  
 *
 * Copyright  1990-2007 Sun Microsystems, Inc. All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version
 * 2 only, as published by the Free Software Foundation.
 * 
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License version 2 for more details (a copy is
 * included at /legal/license.txt).
 * 
 * You should have received a copy of the GNU General Public License
 * version 2 along with this work; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 * 
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
 * Clara, CA 95054 or visit www.sun.com if you need additional
 * information or have any questions.
 */

package com.sun.midp.io.j2me.storage;

import com.sun.midp.i3test.*;
import java.io.IOException;
import javax.microedition.io.Connector;

/**
 * This test is designed to verify the 
 * com.sun.midp.io.j2me.storage.RandomAccessStream API.
 */

public class TestRandomAccessStream extends TestCase {
 
    RandomAccessStream ras;

    public void runTests() {

      declare("RandomAccessStreamCreated");
      ras = new RandomAccessStream();

      boolean exceptionThrown = false;
      try {
          ras.getSizeOf();
      } catch (IOException e) {
	  exceptionThrown = true;
      }
      assertTrue(exceptionThrown); 

      declare("GetSizeOfEmpty");
      exceptionThrown = false;
      try {
          ras.connect("afile", Connector.READ_WRITE);
          assertEquals(0, ras.getSizeOf());
      } catch(IOException e) {
          exceptionThrown = true;
      }
      assertTrue(!exceptionThrown);

      // Need revisit:
      // IOException should be thrown at the attempt to set
      // position beyond the file size
      // Uncomment when fixed
      //
      // declare("SetPositionOnEmpty");
      // exceptionThrown = false;
      // try {
      //     ras.setPosition(8);
      // } catch(IOException e) {
      //     exceptionThrown = true;
      // }
      // assertTrue(exceptionThrown);

      // Need revisit:
      // IOException should be thrown at the attempt to truncate
      // an empty file
      // Uncomment when fixed
      // declare("TruncateEmpty");
      // exceptionThrown = false;
      // try {
      //     ras.truncate(8);
      // } catch(IOException e) {
      //     exceptionThrown = true;
      // }
      // assertTrue(exceptionThrown);


      declare("TestReadAndWrite");
      exceptionThrown = false;
      try {
          byte bytes[] = new byte[100];
          for (int i = 0; i < 100; i++) {
              bytes[i] = (byte)i;
          }
          int bytesReadWritten = ras.writeBytes(bytes, 0, 100);
          assertEquals(100, bytesReadWritten);
          ras.commitWrite();

          assertEquals(100, ras.getSizeOf()); 

          ras.setPosition(0);
          bytesReadWritten = ras.readBytes(bytes, 0, 100);
          assertEquals(100, bytesReadWritten);
          for (int i = 0; i < 100; i++) {
              assertEquals(i, bytes[i]);
          }
      } catch (IOException e) {
          exceptionThrown = true;
      }
      assertTrue(!exceptionThrown);

      cleanUp();
    }

    void cleanUp() {
        File file = new File();
	try {
            file.delete("afile");
        } catch(IOException e) {
        }
    }
}