1 files changed, 15 insertions, 0 deletions
diff --git a/spec/ruby/library/stringio/shared/sysread.rb b/spec/ruby/library/stringio/shared/sysread.rb
new file mode 100644
index 0000000000..3e23fbc233
--- /dev/null
+++ b/spec/ruby/library/stringio/shared/sysread.rb
@@ -0,0 +1,15 @@
+describe :stringio_sysread_length, shared: true do
+  before :each do
+    @io = StringIO.new("example")
+  end
+
+  it "returns an empty String when passed 0 and no data remains" do
+    @io.send(@method, 8).should == "example"
+    @io.send(@method, 0).should == ""
+  end
+
+  it "raises an EOFError when passed length > 0 and no data remains" do
+    @io.read.should == "example"
+    -> { @io.send(@method, 1) }.should raise_error(EOFError)
+  end
+end