1 files changed, 23 insertions, 0 deletions
diff --git a/spec/ruby/library/stringio/close_spec.rb b/spec/ruby/library/stringio/close_spec.rb
new file mode 100644
index 0000000000..6febd14a26
--- /dev/null
+++ b/spec/ruby/library/stringio/close_spec.rb
@@ -0,0 +1,23 @@
+require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
+
+describe "StringIO#close" do
+  before :each do
+    @io = StringIOSpecs.build
+  end
+
+  it "returns nil" do
+    @io.close.should == nil
+  end
+
+  it "prevents further reading and/or writing" do
+    @io.close
+    -> { @io.read(1) }.should.raise(IOError)
+    -> { @io.write('x') }.should.raise(IOError)
+  end
+
+  it "does not raise anything when self was already closed" do
+    @io.close
+    -> { @io.close }.should_not.raise(IOError)
+  end
+end