require_relative '../../spec_helper' require_relative 'fixtures/classes' describe "StringIO#close_read" do before :each do @io = StringIO.new("example") end it "returns nil" do @io.close_read.should be_nil end it "prevents further reading" do @io.close_read -> { @io.read(1) }.should raise_error(IOError) end it "allows further writing" do @io.close_read @io.write("x").should == 1 end it "raises an IOError when in write-only mode" do io = StringIO.new("example", "w") -> { io.close_read }.should raise_error(IOError) io = StringIO.new("example") io.close_read io.close_read.should == nil end end