1 files changed, 28 insertions, 0 deletions
diff --git a/spec/ruby/library/stringio/pos_spec.rb b/spec/ruby/library/stringio/pos_spec.rb
new file mode 100644
index 0000000000..59d0a43f12
--- /dev/null
+++ b/spec/ruby/library/stringio/pos_spec.rb
@@ -0,0 +1,28 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+require File.expand_path('../shared/tell', __FILE__)
+
+describe "StringIO#pos" do
+  it_behaves_like :stringio_tell, :pos
+end
+
+describe "StringIO#pos=" do
+  before :each do
+    @io = StringIOSpecs.build
+  end
+
+  it "updates the current byte offset" do
+    @io.pos = 26
+    @io.read(1).should == "r"
+  end
+
+  it "raises an EINVAL if given a negative argument" do
+    lambda { @io.pos = -10 }.should  raise_error(Errno::EINVAL)
+  end
+
+  it "updates the current byte offset after reaching EOF" do
+    @io.read
+    @io.pos = 26
+    @io.read(1).should == "r"
+  end
+end