mcs/class/corlib/Test/System.IO/StreamCas.cs

   1 //
   2 // StreamCas.cs - CAS unit tests for System.IO.Stream
   3 //
   4 // Author:
   5 //      Sebastien Pouliot  <sebastien@ximian.com>
   6 //
   7 // Copyright (C) 2005 Novell, Inc (http://www.novell.com)
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 using NUnit.Framework;
  30
  31 using System;
  32 using System.IO;
  33 using System.Security;
  34 using System.Security.Permissions;
  35 using System.Threading;
  36
  37 namespace MonoCasTests.System.IO {
  38
  39         // System.IO.Stream is an abstract class, so we use our own inherited
  40         // class for the tests
  41
  42         public class NonAbstractStream : Stream {
  43
  44                 private long _pos;
  45                 private long _length;
  46
  47                 public override bool CanRead {
  48                         get { return true; }
  49                 }
  50
  51                 public override bool CanSeek {
  52                         get { return true; }
  53                 }
  54
  55                 public override bool CanWrite {
  56                         get { return true; }
  57                 }
  58
  59                 public override void Flush ()
  60                 {
  61                 }
  62
  63                 public override long Length {
  64                         get { return _length; }
  65                 }
  66
  67                 public override long Position {
  68                         get { return _pos; }
  69                         set { _pos = value; }
  70                 }
  71
  72                 public override int Read (byte[] buffer, int offset, int count)
  73                 {
  74                         _pos += count;
  75                         return count;
  76                 }
  77
  78                 public override long Seek (long offset, SeekOrigin origin)
  79                 {
  80                         _pos = offset;
  81                         return _pos;
  82                 }
  83
  84                 public override void SetLength (long value)
  85                 {
  86                         _length = value;
  87                 }
  88
  89                 public override void Write (byte[] buffer, int offset, int count)
  90                 {
  91                         _pos += count;
  92                 }
  93         }
  94
  95         [TestFixture]
  96         [Category ("CAS")]
  97         public class StreamCas {
  98
  99                 private const int timeout = 30000;
 100                 private string message;
 101
 102                 static ManualResetEvent reset;
 103
 104                 [TestFixtureSetUp]
 105                 public void FixtureSetUp ()
 106                 {
 107                         reset = new ManualResetEvent (false);
 108                 }
 109
 110                 [TestFixtureTearDown]
 111                 public void FixtureTearDown ()
 112                 {
 113                         reset.Close ();
 114                 }
 115
 116                 [SetUp]
 117                 public void SetUp ()
 118                 {
 119                         if (!SecurityManager.SecurityEnabled)
 120                                 Assert.Ignore ("SecurityManager.SecurityEnabled is OFF");
 121                 }
 122
 123                 // async tests (for stack propagation)
 124
 125                 private void ReadCallback (IAsyncResult ar)
 126                 {
 127                         NonAbstractStream s = (NonAbstractStream) ar.AsyncState;
 128                         s.EndRead (ar);
 129                         try {
 130                                 // can we do something bad here ?
 131                                 Assert.IsNotNull (Environment.GetEnvironmentVariable ("USERNAME"));
 132                                 message = "Expected a SecurityException";
 133                         }
 134                         catch (SecurityException) {
 135                                 message = null;
 136                                 reset.Set ();
 137                         }
 138                         catch (Exception e) {
 139                                 message = e.ToString ();
 140                         }
 141                 }
 142
 143                 [Test]
 144                 [EnvironmentPermission (SecurityAction.Deny, Read = "USERNAME")]
 145                 public void AsyncRead ()
 146                 {
 147                         NonAbstractStream s = new NonAbstractStream ();
 148                         message = "AsyncRead";
 149                         reset.Reset ();
 150                         IAsyncResult r = s.BeginRead (null, 0, 0, new AsyncCallback (ReadCallback), s);
 151                         Assert.IsNotNull (r, "IAsyncResult");
 152                         if (!reset.WaitOne (timeout, true))
 153                                 Assert.Ignore ("Timeout");
 154                         Assert.IsNull (message, message);
 155                 }
 156
 157                 private void WriteCallback (IAsyncResult ar)
 158                 {
 159                         NonAbstractStream s = (NonAbstractStream)ar.AsyncState;
 160                         s.EndWrite (ar);
 161                         try {
 162                                 // can we do something bad here ?
 163                                 Assert.IsNotNull (Environment.GetEnvironmentVariable ("USERNAME"));
 164                                 message = "Expected a SecurityException";
 165                         }
 166                         catch (SecurityException) {
 167                                 message = null;
 168                                 reset.Set ();
 169                         }
 170                         catch (Exception e) {
 171                                 message = e.ToString ();
 172                         }
 173                 }
 174
 175                 [Test]
 176                 [EnvironmentPermission (SecurityAction.Deny, Read = "USERNAME")]
 177                 public void AsyncWrite ()
 178                 {
 179                         NonAbstractStream s = new NonAbstractStream ();
 180                         message = "AsyncWrite";
 181                         reset.Reset ();
 182                         IAsyncResult r = s.BeginWrite (null, 0, 0, new AsyncCallback (WriteCallback), s);
 183                         Assert.IsNotNull (r, "IAsyncResult");
 184                         if (!reset.WaitOne (timeout, true))
 185                                 Assert.Ignore ("Timeout");
 186                         Assert.IsNull (message, message);
 187                 }
 188         }
 189 }