Merge pull request #2267 from herwinw/stringio_sysread_spec

Refresh specs for StringIO#sysread

spec/library/stringio/sysread_spec.rb

@@ -1,6 +1,7 @@
 require_relative '../../spec_helper'
 require "stringio"
 require_relative 'shared/read'
+require_relative 'shared/sysread'
 
 describe "StringIO#sysread when passed length, buffer" do
   it_behaves_like :stringio_read, :sysread
@@ -32,6 +33,10 @@
   end
 end
 
+describe "StringIO#sysread when passed length" do
+  it_behaves_like :stringio_sysread_length, :sysread
+end
+
 describe "StringIO#sysread when passed [length]" do
   before :each do
     @io = StringIO.new("example")