randomaccessfiletest.java

gcc的组建

/*************************************************************************
/* RandomAccessFileTest.java -- Tests RandomAccessFile's
/*
/* Copyright (c) 1998 Free Software Foundation, Inc.
/* Written by Aaron M. Renn ([e-mail])
/*
/* This program is free software; you can redistribute it and/or modify
/* it under the terms of the GNU General Public License as published 
/* by the Free Software Foundation, either version 2 of the License, or
/* (at your option) any later version.
/*
/* 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 for more details.
/*
/* You should have received a copy of the GNU General Public License
/* along with this program; if not, write to the Free Software Foundation
/* Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
/*************************************************************************/

import java.io.*;

// Write some data using DataOutput and read it using DataInput.

public class RandomAccessFileTest
{

public static void
runReadTest(String filename, int seq, String testname)
{
  try
    {
      System.out.println("Test " + seq + ": " + testname);

      RandomAccessFile ras = new RandomAccessFile(filename, "r");

      boolean passed = true;

      boolean b = ras.readBoolean();
      if (b != true)
        {
          passed = false;
          System.out.println("Failed to read boolean. Expected true and got false");
        }
      b = ras.readBoolean();
      if (b != false)
        {
          passed = false;
          System.out.println("Failed to read boolean. Expected false and got true");
        }
      byte bt = ras.readByte();
      if (bt != 8)
        {
          passed = false;
          System.out.println("Failed to read byte. Expected 8 and got "+ bt);
        }
      bt = ras.readByte();
      if (bt != -122)
        {
          passed = false;
          System.out.println("Failed to read byte. Expected -122 and got "+ bt);
        }
      char c = ras.readChar();
      if (c != 'a')
        {
          passed = false;
          System.out.println("Failed to read char. Expected a and got " + c);
        }
      c = ras.readChar();
      if (c != '\uE2D2')
        {
          passed = false;
          System.out.println("Failed to read char. Expected \\uE2D2 and got " + c);
        }
      short s = ras.readShort();
      if (s != 32000)
        {
          passed = false;
          System.out.println("Failed to read short. Expected 32000 and got " + s);
        }
      int i = ras.readInt();
      if (i != 8675309)
        {
          passed = false;
          System.out.println("Failed to read int. Expected 8675309 and got " + i);
        }
      long l = ras.readLong();
      if (l != 696969696969L)
        {
          passed = false;
          System.out.println("Failed to read long. Expected 696969696969 and got " + l);
        }
      float f = ras.readFloat();
      if (!Float.toString(f).equals("3.1415"))
        {
          passed = false;
          System.out.println("Failed to read float. Expected 3.1415 and got " + f);
        }
      double d = ras.readDouble();
      if (d != 999999999.999)
        {
          passed = false;
          System.out.println("Failed to read double.  Expected 999999999.999 and got " + d);
        }
      String str = ras.readUTF();
      if (!str.equals("Testing code is such a boring activity but it must be done"))
        {
          passed = false;
          System.out.println("Read unexpected String: " + str);
        }
      str = ras.readUTF();
      if (!str.equals("a-->\u01FF\uA000\u6666\u0200RRR"))
        {
          passed = false;
          System.out.println("Read unexpected String: " + str);
        }
    
      if (passed)
        System.out.println("PASSED: " + testname + " read test");
      else
        System.out.println("FAILED: " + testname + " read test");
    }
  catch (IOException e)
    {
      System.out.println("FAILED: " + testname + " read test: " + e);
    }

}

public static void 
main(String[] argv)
{
  System.out.println("Started test of RandomAccessFile");

  System.out.println("Test 1: RandomAccessFile write test");
  try
    {
      RandomAccessFile raf = new RandomAccessFile("dataoutput.out", "rw");

      raf.writeBoolean(true);
      raf.writeBoolean(false);
      raf.writeByte((byte)8);
      raf.writeByte((byte)-122);
      raf.writeChar((char)'a');
      raf.writeChar((char)'\uE2D2');
      raf.writeShort((short)32000);
      raf.writeInt((int)8675309);
      raf.writeLong((long) 696969696969L);
      raf.writeFloat((float)3.1415);
      raf.writeDouble((double)999999999.999);
      raf.writeUTF("Testing code is such a boring activity but it must be done");
      raf.writeUTF("a-->\u01FF\uA000\u6666\u0200RRR");
      raf.close();

      // We'll find out if this was really right later, but conditionally
      // report success for now
      System.out.println("PASSED: RandomAccessFile write test");
    }
  catch(IOException e)
    {
      System.out.println("FAILED: RandomAccessFile write test: " + e);
    }

  runReadTest("dataoutput.out", 2, "Read of JCL written data file");
  runReadTest("dataoutput-jdk.out", 3, "Read of JDK written data file");

  System.out.println("Test 2: Seek Test");  
  try
    {
      RandomAccessFile raf = new RandomAccessFile("/etc/services", "r");

      System.out.println("Length: " + raf.length());

      raf.skipBytes(24);
      if (raf.getFilePointer() != 24)
        throw new IOException("Unexpected file pointer value " + 
                              raf.getFilePointer());     

      raf.seek(0);
      if (raf.getFilePointer() != 0)
        throw new IOException("Unexpected file pointer value " + 
                              raf.getFilePointer());     

      raf.seek(100);
      if (raf.getFilePointer() != 100)
        throw new IOException("Unexpected file pointer value " + 
                              raf.getFilePointer());     

      System.out.println("PASSED: Seek Test");
    }
  catch(IOException e)
    {
      System.out.println("FAILED: Seek Test: " + e);
    }

  System.out.println("Test 3: Validation Test");
  boolean failed = false;
  try
    {
      new RandomAccessFile("/vmlinuz", "rwx"); 
      System.out.println("Did not detect invalid mode");
      failed = true;
    }
  catch (IllegalArgumentException e) { ; }
  catch (IOException e) { ; }

  try
    {
      new RandomAccessFile("/vmlinuz", "rw");
      System.out.println("Did not detect read only file opened for write");
      failed = true;
    }
  catch (IOException e) { ; }
  
  try
    {
      new RandomAccessFile("/sherlockholmes", "r");
      System.out.println("Did not detect non-existent file");
      failed = true;
    }
  catch (IOException e) { ; }

  try
    {
      RandomAccessFile raf = new RandomAccessFile("/etc/services", "r");
      raf.seek(raf.length());
      raf.write('\n');
      System.out.println("Did not detect invalid write operation on read only file");
      failed = true;
    } 
  catch (IOException e) { ; }

  if (failed)
    System.out.println("FAILED: Validation Test");
  else
    System.out.println("PASSED: Validation Test");

/*
  System.out.println("Test 4: Set File Length Rest");
  try
    {
      File f = new File("tmptmptmp");
      RandomAccessFile raf = new RandomAccessFile("tmptmptmp", "rw");

      raf.setLength(50L);
      if (raf.length() != 50)
        throw new IOException("Bad length on extending file of " + raf.length());      

      raf.setLength(25L);
      if (raf.length() != 25)
        throw new IOException("Bad length on extending file of " + raf.length());      

      raf.close();
      f.delete();

      System.out.println("PASSED: Set File Length Test");
    }
  catch(IOException e) 
    {
      System.out.println("FAILED: Set File Length Test: " + e);
      (new File("tmptmptmp")).delete();
    }
*/
  System.out.println("Finished test of RandomAccessFile");
} // main

} // class DataInputOutputTest