Home | History | Annotate | Download | only in io 
      1 /*
      2  *  Licensed to the Apache Software Foundation (ASF) under one or more
      3  *  contributor license agreements.  See the NOTICE file distributed with
      4  *  this work for additional information regarding copyright ownership.
      5  *  The ASF licenses this file to You under the Apache License, Version 2.0
      6  *  (the "License"); you may not use this file except in compliance with
      7  *  the License.  You may obtain a copy of the License at
      8  *
      9  *     http://www.apache.org/licenses/LICENSE-2.0
     10  *
     11  *  Unless required by applicable law or agreed to in writing, software
     12  *  distributed under the License is distributed on an "AS IS" BASIS,
     13  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     14  *  See the License for the specific language governing permissions and
     15  *  limitations under the License.
     16  */
     17 
     18 package org.apache.harmony.tests.java.io;
     19 
     20 import java.io.File;
     21 import java.io.FileDescriptor;
     22 import java.io.FileInputStream;
     23 import java.io.FileOutputStream;
     24 import java.io.IOException;
     25 import java.io.RandomAccessFile;
     26 import java.nio.charset.StandardCharsets;
     27 import junit.framework.TestCase;
     28 
     29 public class FileDescriptorTest extends TestCase {
     30 
     31     public void test_sync() throws IOException {
     32         File f = File.createTempFile("FileDescriptorText", "txt");
     33 
     34         FileOutputStream fos = null;
     35         FileInputStream fis = null;
     36         RandomAccessFile raf = null;
     37 
     38         try {
     39             fos = new FileOutputStream(f.getAbsolutePath());
     40             fos.write("Test String".getBytes(StandardCharsets.US_ASCII));
     41 
     42             fis = new FileInputStream(f.getPath());
     43             FileDescriptor fd = fos.getFD();
     44             fd.sync();
     45 
     46             int length = "Test String".length();
     47             assertEquals(length, fis.available());
     48 
     49             // Regression test for Harmony-1494
     50             fd = fis.getFD();
     51             fd.sync();
     52             assertEquals(length, fis.available());
     53 
     54             raf = new RandomAccessFile(f, "r");
     55             fd = raf.getFD();
     56             fd.sync();
     57         } finally {
     58             if (fos != null) {
     59                 fos.close();
     60             }
     61             if (fis != null) {
     62                 fis.close();
     63             }
     64             if (raf != null) {
     65                 raf.close();
     66             }
     67         }
     68     }
     69 
     70     /**
     71      * java.io.FileDescriptor#valid()
     72      */
     73     public void test_valid() throws IOException {
     74         File f = File.createTempFile("FileDescriptorText", "txt");
     75 
     76         FileOutputStream fos = null;
     77         try {
     78             fos = new FileOutputStream(f.getAbsolutePath());
     79             FileDescriptor fd = fos.getFD();
     80             assertTrue(fd.valid());
     81             fos.close();
     82             assertFalse(fd.valid());
     83         } finally {
     84             if (fos != null) {
     85                 fos.close();
     86             }
     87         }
     88     }
     89 }
     90