C# StdioFileStream.Write方法代码示例

		public void Write_CountOverflow ()
		{
			string path = TempFolder + Path.DirectorySeparatorChar + "temp";
			DeleteFile (path);

			using (StdioFileStream stream = new StdioFileStream (path, FileMode.OpenOrCreate, FileAccess.Write)) {
				stream.Write (new byte[0], 1, Int32.MaxValue);
			}
		}

		public void TestFlushNotOwningHandle ()
		{
			string path = Path.Combine (TempFolder, "TestFlushNotOwningHandle");
			DeleteFile (path);

			StdioFileStream s = new StdioFileStream (path, FileMode.Create);
			using (StdioFileStream s2 = new StdioFileStream (s.Handle, FileAccess.Write, false)) {
				byte[] buf = new byte [2];
				buf [0] = (int)'1';
				s2.Write (buf, 0, 1);
			}

			s.Position = 0;
			Assert.AreEqual (s.ReadByte (), (int)'1');
			s.Close ();
		}

		public void Write_OffsetNegative ()
		{
			string path = TempFolder + Path.DirectorySeparatorChar + "temp";
			DeleteFile (path);

			using (StdioFileStream stream = new StdioFileStream (path, FileMode.OpenOrCreate, FileAccess.Write)) {
				stream.Write (new byte[0], -1, 1);
			}
		}

		public void TestClose ()
		{
#if FALSE
			string path = TempFolder + Path.DirectorySeparatorChar + "TestClose";
			DeleteFile (path);

			StdioFileStream stream = new StdioFileStream (path, FileMode.CreateNew, FileAccess.ReadWrite);

			stream.Write (new byte [] {1, 2, 3, 4}, 0, 4);
			stream.ReadByte ();                	
			stream.Close ();

			try {                	
				stream.ReadByte ();
				Assert.Fail ();
			} catch (Exception e) {
				Assert.AreEqual (typeof (ObjectDisposedException), e.GetType (), "test#01");
			}

			try {                	
				stream.WriteByte (64);
				Assert.Fail ();
			} catch (Exception e) {
				Assert.AreEqual (typeof (ObjectDisposedException), e.GetType (), "test#02");
			}

			try {                	
				stream.Flush ();
				Assert.Fail ();
			} catch (Exception e) {
				Assert.AreEqual (typeof (ObjectDisposedException), e.GetType (), "test#03");
			}

			try { 
				long l = stream.Length;
				Assert.Fail ();
			} catch (Exception e) {
				Assert.AreEqual (typeof (ObjectDisposedException), e.GetType (), "test#04");
			}

			try { 
				long l = stream.Position;
				Assert.Fail ();
			} catch (Exception e) {
				Assert.AreEqual (typeof (ObjectDisposedException), e.GetType (), "test#05");
			}

			try { 
				FilePosition fp = stream.FilePosition;
				fp.Dispose ();
				Assert.Fail ();
			} catch (Exception e) {
				Assert.AreEqual (typeof (ObjectDisposedException), e.GetType (), "test#05");
			}

			Assert.AreEqual (false, stream.CanRead, "test#06");
			Assert.AreEqual (false, stream.CanSeek, "test#07");
			Assert.AreEqual (false, stream.CanWrite, "test#08");                	

			DeleteFile (path);                	
#endif
		}

		public void TestWriteVerifyAccessMode ()
		{
			string path = TempFolder + Path.DirectorySeparatorChar + "temp";
			DeleteFile (path);

			StdioFileStream stream = null;
			byte[] buffer;

			try {
				buffer = Encoding.ASCII.GetBytes ("test");
				stream = new StdioFileStream (path, FileMode.OpenOrCreate, FileAccess.Read);
				stream.Write (buffer, 0, buffer.Length);
			} finally {
				if (stream != null)
					stream.Close();
				DeleteFile (path);
			}
		}

		public void Seek ()
		{
			string path = TempFolder + DSC + "FST.Seek.Test";
			DeleteFile (path);			

			StdioFileStream stream = new StdioFileStream (path, FileMode.CreateNew, FileAccess.ReadWrite);
			StdioFileStream stream2 = new StdioFileStream (path, FileMode.Open, FileAccess.ReadWrite);

			stream.Write (new byte [] {1, 2, 3, 4, 5, 6, 7, 8, 10}, 0, 9);
			Assert.AreEqual (5, stream2.Seek (5, SeekOrigin.Begin), "test#01");
			Assert.AreEqual (-1, stream2.ReadByte (), "test#02");

			Assert.AreEqual (2, stream2.Seek (-3, SeekOrigin.Current), "test#03");
			Assert.AreEqual (-1, stream2.ReadByte (), "test#04");

			Assert.AreEqual (12, stream.Seek (3, SeekOrigin.Current), "test#05");
			Assert.AreEqual (-1, stream.ReadByte (), "test#06");

			Assert.AreEqual (5, stream.Seek (-7, SeekOrigin.Current), "test#07");
			Assert.AreEqual (6, stream.ReadByte (), "test#08");

			Assert.AreEqual (5, stream2.Seek (5, SeekOrigin.Begin), "test#09");
			Assert.AreEqual (6, stream2.ReadByte (), "test#10");

			stream.Close ();
			stream2.Close ();

			DeleteFile (path);
		}

		public void TestSeek ()
		{
			string path = TempFolder + Path.DirectorySeparatorChar + "TestSeek";
			DeleteFile (path);

			StdioFileStream stream = new StdioFileStream (path, FileMode.CreateNew, FileAccess.ReadWrite);
			stream.Write (new byte[] {1, 2, 3, 4, 5, 6, 7, 8 , 9, 10}, 0, 10);

			stream.Seek (5, SeekOrigin.End);
			Assert.AreEqual (-1, stream.ReadByte (), "test#01");

			stream.Seek (-5, SeekOrigin.End);
			Assert.AreEqual (6, stream.ReadByte (), "test#02");

			try {
				stream.Seek (-11, SeekOrigin.End);
				Assert.Fail ();
			} catch (Exception e) {
				Assert.AreEqual (typeof (IOException), e.GetType (), "test#03");
			}

			stream.Seek (19, SeekOrigin.Begin);
			Assert.AreEqual (-1, stream.ReadByte (), "test#04");

			stream.Seek (1, SeekOrigin.Begin);
			Assert.AreEqual (2, stream.ReadByte (), "test#05");

			stream.Seek (3, SeekOrigin.Current);
			Assert.AreEqual (6, stream.ReadByte (), "test#06");

			stream.Seek (-2, SeekOrigin.Current);
			Assert.AreEqual (5, stream.ReadByte (), "test#07");

			stream.Flush ();

			// Test that seeks work correctly when seeking inside the buffer
			stream.Seek (0, SeekOrigin.Begin);
			stream.WriteByte (0);
			stream.WriteByte (1);
			stream.Seek (0, SeekOrigin.Begin);
			byte[] buf = new byte [1];
			buf [0] = 2;
			stream.Write (buf, 0, 1);
			stream.Write (buf, 0, 1);
			stream.Flush ();
			stream.Seek (0, SeekOrigin.Begin);
			Assert.AreEqual (2, stream.ReadByte (), "test#08");
			Assert.AreEqual (2, stream.ReadByte (), "test#09");

			stream.Close ();

			DeleteFile (path);
		}

		public void PositionAfterWrite ()
		{
#if XXX
			string path = TempFolder + DSC + "FST.Position.Test";
			DeleteFile (path);			

			StdioFileStream stream = new StdioFileStream (path, FileMode.CreateNew, 
				FileAccess.ReadWrite);

			FilePosition fp;

			Assert.AreEqual (0, stream.Position, "test #01");
			Assert.AreEqual ("(Mono.Unix.FilePosition 00000000", 
				(fp = stream.FilePosition).ToString().Substring (0, 32), "test#02");
			fp.Dispose ();

			byte[] message = new byte[]{
				(byte) 'H', (byte) 'e', (byte) 'l', (byte) 'l', (byte) 'o', (byte) ' ',
				(byte) 'W', (byte) 'o', (byte) 'r', (byte) 'l', (byte) 'd',
			};

			stream.Write (message, 0, message.Length);

			Assert.AreEqual (11, stream.Position, "test #03");
			Assert.AreEqual (message.Length, stream.Position, "test #04");
			Assert.AreEqual ("(Mono.Unix.FilePosition 0B000000", 
				(fp = stream.FilePosition).ToString().Substring (0, 32), "test#04");
			fp.Dispose ();
#endif
		}

		public void Flush ()
		{
#if XXX
		    // This test depends too much on the internal implementation of stdio's FILE
		    
			string path = TempFolder + DSC + "StdioFileStreamTest.Flush";
			StdioFileStream stream = null;
			StdioFileStream stream2 = null;

			DeleteFile (path);

			try {
				stream = new StdioFileStream (path, FileMode.CreateNew, FileAccess.ReadWrite);
				stream2 = new StdioFileStream (path, FileMode.Open, FileAccess.ReadWrite);

				stream.Write (new byte [] {1, 2, 3, 4, 5}, 0, 5);

				byte [] bytes = new byte [5];
				stream2.Read (bytes, 0, 5);

				Assert.AreEqual (0, bytes [0], "test#01");
				Assert.AreEqual (0, bytes [1], "test#02");
				Assert.AreEqual (0, bytes [2], "test#03");
				Assert.AreEqual (0, bytes [3], "test#04");

				stream.Flush ();
				stream2.Read (bytes, 0, 5);			
				Assert.AreEqual (1, bytes [0], "test#05");
				Assert.AreEqual (2, bytes [1], "test#06");
				Assert.AreEqual (3, bytes [2], "test#07");
				Assert.AreEqual (4, bytes [3], "test#08");
			} finally {
				if (stream != null)
					stream.Close ();
				if (stream2 != null)
					stream2.Close ();

				Console.WriteLine ("P: " + path);
				//DeleteFile (path);
			}
#endif
		}

		public void Length ()
		{
			// Test that the Length property takes into account the data
			// in the buffer
			string path = TempFolder + DSC + "StdioFileStreamTest.Length";

			DeleteFile (path);

			StdioFileStream stream = new StdioFileStream (path, FileMode.CreateNew);

			byte[] outbytes = new byte [] {1, 2, 3, 4};

			stream.Write (outbytes, 0, 4);
			Assert.AreEqual (stream.Length, 4);
			stream.Close ();
		}

		public void Write ()
		{
			string path = TempFolder + DSC + "StdioFileStreamTest.Write";

			DeleteFile (path);

			StdioFileStream stream = new StdioFileStream (path, FileMode.CreateNew, FileAccess.ReadWrite);

			byte[] outbytes = new byte [] {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16};
			byte[] bytes = new byte [15];

			// Check that the data is flushed when we overflow the buffer
			// with a large amount of data
			stream.Write (outbytes, 0, 5);
			stream.Write (outbytes, 5, 10);
			stream.Seek (0, SeekOrigin.Begin);

			stream.Read (bytes, 0, 15);
			for (int i = 0; i < 15; ++i)
				Assert.AreEqual (i + 1, bytes [i]);

			// Check that the data is flushed when we overflow the buffer
			// with a small amount of data
			stream.Write (outbytes, 0, 7);
			stream.Write (outbytes, 7, 7);
			stream.Write (outbytes, 14, 1);

			stream.Seek (15, SeekOrigin.Begin);
			Array.Clear (bytes, 0, bytes.Length);
			stream.Read (bytes, 0, 15);
			for (int i = 0; i < 15; ++i)
				Assert.AreEqual (i + 1, bytes [i]);
			stream.Close ();
		}

		public void Flush ()
		{
			string path = TempFolder + DSC + "StdioFileStreamTest.Flush";
			StdioFileStream stream = null;
			StdioFileStream stream2 = null;

			DeleteFile (path);

			try {
				stream = new StdioFileStream (path, FileMode.CreateNew, FileAccess.ReadWrite);
				stream2 = new StdioFileStream (path, FileMode.Open, FileAccess.ReadWrite);

				stream.Write (new byte [] {1, 2, 3, 4, 5}, 0, 5);

				byte [] bytes = new byte [5];
				stream2.Read (bytes, 0, 5);

				Assert.AreEqual (0, bytes [0], "test#01");
				Assert.AreEqual (0, bytes [1], "test#02");
				Assert.AreEqual (0, bytes [2], "test#03");
				Assert.AreEqual (0, bytes [3], "test#04");

				stream.Flush ();
				stream2.Read (bytes, 0, 5);			
				Assert.AreEqual (1, bytes [0], "test#05");
				Assert.AreEqual (2, bytes [1], "test#06");
				Assert.AreEqual (3, bytes [2], "test#07");
				Assert.AreEqual (4, bytes [3], "test#08");
			} finally {
				if (stream != null)
					stream.Close ();
				if (stream2 != null)
					stream2.Close ();

				DeleteFile (path);
			}
		}