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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)
describe "IO#close_write" do
before :each do
@io = IO.popen 'cat', 'r+'
@path = tmp('io.close.txt')
end
after :each do
@io.close unless @io.closed?
rm_r @path
end
it "closes the write end of a duplex I/O stream" do
@io.close_write
lambda { @io.write "attempt to write" }.should raise_error(IOError)
end
it "raises an IOError on subsequent invocations" do
@io.close_write
lambda { @io.close_write }.should raise_error(IOError)
end
it "allows subsequent invocation of close" do
@io.close_write
lambda { @io.close }.should_not raise_error
end
it "raises an IOError if the stream is readable and not duplexed" do
io = File.open @path, 'w+'
begin
lambda { io.close_write }.should raise_error(IOError)
ensure
io.close unless io.closed?
end
end
it "closes the stream if it is neither readable nor duplexed" do
io = File.open @path, 'w'
io.close_write
io.closed?.should == true
end
it "flushes and closes the write stream" do
@io.puts '12345'
@io.close_write
@io.read.should == "12345\n"
end
it "raises IOError on closed stream" do
@io.close
lambda { @io.close_write }.should raise_error(IOError)
end
end
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