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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
describe "IO#close" do
before :each do
@name = tmp('io_close.txt')
@io = new_io @name
end
after :each do
@io.close unless @io.closed?
rm_r @name
end
it "closes the stream" do
@io.close
@io.should.closed?
end
it "returns nil" do
@io.close.should == nil
end
it "raises an IOError reading from a closed IO" do
@io.close
-> { @io.read }.should raise_error(IOError)
end
it "raises an IOError writing to a closed IO" do
@io.close
-> { @io.write "data" }.should raise_error(IOError)
end
it 'does not close the stream if autoclose is false' do
other_io = IO.new(@io.fileno)
other_io.autoclose = false
other_io.close
-> { @io.write "data" }.should_not raise_error(IOError)
end
it "does nothing if already closed" do
@io.close
@io.close.should be_nil
end
it "does not call the #flush method but flushes the stream internally" do
@io.should_not_receive(:flush)
@io.close
@io.should.closed?
end
it 'raises an IOError with a clear message' do
matching_exception = nil
-> do
IOSpecs::THREAD_CLOSE_RETRIES.times do
read_io, write_io = IO.pipe
going_to_read = false
thread = Thread.new do
begin
going_to_read = true
read_io.read
rescue IOError => ioe
if ioe.message == IOSpecs::THREAD_CLOSE_ERROR_MESSAGE
matching_exception = ioe
end
# try again
end
end
# best attempt to ensure the thread is actually blocked on read
Thread.pass until going_to_read && thread.stop?
sleep(0.001)
read_io.close
thread.join
write_io.close
matching_exception&.tap {|ex| raise ex}
end
end.should raise_error(IOError, IOSpecs::THREAD_CLOSE_ERROR_MESSAGE)
end
end
describe "IO#close on an IO.popen stream" do
it "clears #pid" do
io = IO.popen ruby_cmd('r = loop{puts "y"; 0} rescue 1; exit r'), 'r'
io.pid.should_not == 0
io.close
-> { io.pid }.should raise_error(IOError)
end
it "sets $?" do
io = IO.popen ruby_cmd('exit 0'), 'r'
io.close
$?.exitstatus.should == 0
io = IO.popen ruby_cmd('exit 1'), 'r'
io.close
$?.exitstatus.should == 1
end
it "waits for the child to exit" do
io = IO.popen ruby_cmd('r = loop{puts "y"; 0} rescue 1; exit r'), 'r'
io.close
$?.exitstatus.should_not == 0
end
end
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