[corlib] Initialize null stream reader

mono · Feb 4, 2014 · d3b817c · d3b817c
1 parent 2783684
commit d3b817c
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diff --git a/mcs/class/corlib/System.IO/StreamReader.cs b/mcs/class/corlib/System.IO/StreamReader.cs
@@ -44,6 +44,11 @@ public class StreamReader : TextReader
 	{
 		sealed class NullStreamReader : StreamReader
 		{
+			internal NullStreamReader ()
+			{
+				base_stream = Stream.Null;
+			}
+
 			public override int Peek ()
 			{
 				return -1;

diff --git a/mcs/class/corlib/Test/System.IO/StreamReaderTest.cs b/mcs/class/corlib/Test/System.IO/StreamReaderTest.cs
@@ -838,6 +838,13 @@ public void EncodingChangedAuto ()
 		}
 	}
 
+	[Test]
+	public void NullStream ()
+	{
+		var buffer = new char[2];
+		Assert.AreEqual (0, StreamReader.Null.ReadBlock (buffer, 0, buffer.Length));
+	}
+
 #if NET_4_5
 	[Test]
 	public void ReadLineAsync ()