2018-03-04 10:09:32 -05:00
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require_relative '../../spec_helper'
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require_relative 'fixtures/classes'
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2017-05-07 08:04:49 -04:00
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describe "IO#dup" do
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before :each do
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2018-12-28 19:22:52 -05:00
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@file = tmp("spec_io_dup")
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2017-05-07 08:04:49 -04:00
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@f = File.open @file, 'w+'
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@i = @f.dup
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@f.sync = true
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@i.sync = true
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end
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after :each do
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@i.close if @i && !@i.closed?
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@f.close if @f && !@f.closed?
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rm_r @file
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end
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it "returns a new IO instance" do
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@i.class.should == @f.class
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end
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it "sets a new descriptor on the returned object" do
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@i.fileno.should_not == @f.fileno
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end
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quarantine! do # This does not appear to be consistent across platforms
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it "shares the original stream between the two IOs" do
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start = @f.pos
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@i.pos.should == start
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s = "Hello, wo.. wait, where am I?\n"
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s2 = "<evil voice> Muhahahaa!"
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@f.write s
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@i.pos.should == @f.pos
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@i.rewind
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@i.gets.should == s
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@i.rewind
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@i.write s2
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@f.rewind
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@f.gets.should == "#{s2}\n"
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end
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end
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it "allows closing the new IO without affecting the original" do
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@i.close
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2019-07-27 06:40:09 -04:00
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-> { @f.gets }.should_not raise_error(Exception)
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2017-05-07 08:04:49 -04:00
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2020-05-03 06:28:29 -04:00
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@i.should.closed?
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@f.should_not.closed?
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2017-05-07 08:04:49 -04:00
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end
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it "allows closing the original IO without affecting the new one" do
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@f.close
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2019-07-27 06:40:09 -04:00
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-> { @i.gets }.should_not raise_error(Exception)
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2017-05-07 08:04:49 -04:00
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2020-05-03 06:28:29 -04:00
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@i.should_not.closed?
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@f.should.closed?
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2017-05-07 08:04:49 -04:00
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end
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it "raises IOError on closed stream" do
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2019-07-27 06:40:09 -04:00
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-> { IOSpecs.closed_io.dup }.should raise_error(IOError)
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2017-05-07 08:04:49 -04:00
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end
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2018-12-28 19:22:52 -05:00
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it "always sets the close-on-exec flag for the new IO object" do
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@f.close_on_exec = true
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dup = @f.dup
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begin
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2020-05-03 06:28:29 -04:00
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dup.should.close_on_exec?
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2018-12-28 19:22:52 -05:00
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ensure
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dup.close
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end
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@f.close_on_exec = false
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dup = @f.dup
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begin
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2020-05-03 06:28:29 -04:00
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dup.should.close_on_exec?
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2018-12-28 19:22:52 -05:00
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ensure
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dup.close
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end
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end
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2017-05-07 08:04:49 -04:00
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end
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