1 files changed, 32 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..423aad4bd1
--- /dev/null
+++ b/spec/ruby/library/stringio/close_spec.rb
@@ -0,0 +1,32 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "StringIO#close" do
+  before :each do
+    @io = StringIOSpecs.build
+  end
+
+  it "returns nil" do
+    @io.close.should be_nil
+  end
+
+  it "prevents further reading and/or writing" do
+    @io.close
+    lambda { @io.read(1) }.should raise_error(IOError)
+    lambda { @io.write('x') }.should raise_error(IOError)
+  end
+
+  ruby_version_is ''...'2.3' do
+    it "raises an IOError when self was already closed" do
+      @io.close
+      lambda { @io.close }.should raise_error(IOError)
+    end
+  end
+
+  ruby_version_is "2.3" do
+    it "does not raise anything when self was already closed" do
+      @io.close
+      lambda { @io.close }.should_not raise_error(IOError)
+    end
+  end
+end