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

   1 //
   2 // StreamTest.cs
   3 //
   4 // Authors:
   5 //      Marek Safar  <marek.safar@gmail.com>
   6 //
   7 // Copyright 2011 Xamarin, Inc (http://www.xamarin.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 System;
  30 using System.IO;
  31
  32 using NUnit.Framework;
  33
  34 namespace MonoTests.System.IO
  35 {
  36         [TestFixture]
  37         public class StreamTest
  38         {
  39                 class MockStream : Stream
  40                 {
  41                         bool canRead, canSeek, canWrite;
  42                         public event Action OnFlush;
  43                         public event Func<byte[], int, int, int> OnRead;
  44                         public event Action<byte[], int, int> OnWrite;
  45
  46                         public MockStream (bool canRead, bool canSeek, bool canWrite)
  47                         {
  48                                 this.canRead = canRead;
  49                                 this.canSeek = canSeek;
  50                                 this.canWrite = canWrite;
  51                         }
  52
  53                         public override bool CanRead {
  54                                 get {
  55                                         return canRead;
  56                                 }
  57                         }
  58
  59                         public override bool CanSeek {
  60                                 get {
  61                                         return canSeek;
  62                                 }
  63                         }
  64
  65                         public override bool CanWrite {
  66                                 get {
  67                                         return canWrite;
  68                                 }
  69                         }
  70
  71                         public override void Flush ()
  72                         {
  73                                 if (OnFlush != null)
  74                                         OnFlush ();
  75                         }
  76
  77                         public override long Length {
  78                                 get { throw new NotImplementedException (); }
  79                         }
  80
  81                         public override long Position {
  82                                 get {
  83                                         throw new NotImplementedException ();
  84                                 }
  85                                 set {
  86                                         throw new NotImplementedException ();
  87                                 }
  88                         }
  89
  90                         public override int Read (byte[] buffer, int offset, int count)
  91                         {
  92                                 if (OnRead != null)
  93                                         return OnRead (buffer, offset, count);
  94
  95                                 return -1;
  96                         }
  97
  98                         public override long Seek (long offset, SeekOrigin origin)
  99                         {
 100                                 throw new NotImplementedException ();
 101                         }
 102
 103                         public override void SetLength (long value)
 104                         {
 105                                 throw new NotImplementedException ();
 106                         }
 107
 108                         public override void Write (byte[] buffer, int offset, int count)
 109                         {
 110                                 if (OnWrite != null)
 111                                         OnWrite (buffer, offset, count);
 112                         }
 113                 }
 114
 115                 [Test]
 116                 public void SynchronizedTest ()
 117                 {
 118                         var s = Stream.Synchronized (new MemoryStream ());
 119                         s.Close ();
 120                         Assert.IsFalse (s.CanRead, "#1");
 121                 }
 122
 123                 [Test]
 124                 public void CopyAsync ()
 125                 {
 126                         var ms = new MockStream (true, false, true);
 127                         int counter = 4;
 128                         ms.OnRead += delegate { return --counter; };
 129                         var memory = new MemoryStream ();
 130                         Assert.IsTrue (ms.CopyToAsync (ms).Wait (1000));
 131                 }
 132
 133                 [Test]
 134                 public void FlushAsync ()
 135                 {
 136                         bool called = false;
 137                         var ms = new MockStream (false, false, false);
 138                         ms.OnFlush += () => { called = true; };
 139                         var t = ms.FlushAsync ();
 140                         Assert.IsTrue (t.Wait (1000), "#1");
 141                         Assert.IsTrue (called, "#2");
 142                 }
 143
 144                 [Test]
 145                 public void FlushAsync_Exception ()
 146                 {
 147                         var ms = new MockStream (false, false, false);
 148                         ms.OnFlush += () => { throw new ApplicationException (); };
 149                         var t = ms.FlushAsync ();
 150                         try {
 151                                 t.Wait (1000);
 152                                 Assert.Fail ();
 153                         } catch (AggregateException) {
 154                         }
 155                 }
 156
 157                 [Test]
 158                 public void ReadAsync ()
 159                 {
 160                         bool called = false;
 161                         var buffer = new byte[4];
 162                         var ms = new MockStream (true, false, false);
 163                         ms.OnRead += (b, p, c) => { called = true; return 2; };
 164                         var t = ms.ReadAsync (buffer, 0, 4);
 165
 166                         Assert.IsTrue (t.Wait (1000), "#1");
 167                         Assert.IsTrue (called, "#2");
 168                         Assert.AreEqual (2, t.Result, "#3");
 169                 }
 170
 171                 [Test]
 172                 public void ReadAsync_Exception ()
 173                 {
 174                         var buffer = new byte[4];
 175                         var ms = new MockStream (true, false, false);
 176                         ms.OnRead += (b, p, c) => { throw new ApplicationException (); };
 177                         var t = ms.ReadAsync (buffer, 0, 4);
 178
 179                         try {
 180                                 t.Wait (1000);
 181                                 Assert.Fail ();
 182                         } catch (AggregateException) {
 183                         }
 184                 }
 185
 186                 [Test]
 187                 public void WriteAsync ()
 188                 {
 189                         bool called = false;
 190                         var buffer = new byte[4];
 191                         var ms = new MockStream (false, false, true);
 192                         ms.OnWrite += (b, p, c) => { called = true; };
 193                         var t = ms.WriteAsync (buffer, 0, 4);
 194
 195                         Assert.IsTrue (t.Wait (1000), "#1");
 196                         Assert.IsTrue (called, "#2");
 197                 }
 198
 199                 [Test]
 200                 public void WriteAsync_Exception ()
 201                 {
 202                         var buffer = new byte[4];
 203                         var ms = new MockStream (false, false, true);
 204                         ms.OnWrite += (b, p, c) => { throw new ApplicationException (); };
 205                         var t = ms.WriteAsync (buffer, 0, 4);
 206
 207                         try {
 208                                 t.Wait (1000);
 209                                 Assert.Fail ();
 210                         } catch (AggregateException) {
 211                         }
 212                 }
 213         }
 214 }