1 files changed, 16 insertions, 0 deletions
diff --git a/spec/ruby/core/io/sysread_spec.rb b/spec/ruby/core/io/sysread_spec.rb
index 1993653df9..bedcc31169 100644
--- a/spec/ruby/core/io/sysread_spec.rb
+++ b/spec/ruby/core/io/sysread_spec.rb
@@ -80,3 +80,19 @@ describe "IO#sysread on a file" do
     lambda { IOSpecs.closed_io.sysread(5) }.should raise_error(IOError)
   end
 end
+
+describe "IO#sysread" do
+  before do
+    @read, @write = IO.pipe
+  end
+
+  after do
+    @read.close
+    @write.close
+  end
+
+  it "returns a smaller string if less than size bytes are available" do
+    @write.syswrite "ab"
+    @read.sysread(3).should == "ab"
+  end
+end