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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)
describe "IO#ioctl" do
it "raises IOError on closed stream" do
lambda { IOSpecs.closed_io.ioctl(5, 5) }.should raise_error(IOError)
end
platform_is :os => :linux do
it "resizes an empty String to match the output size" do
File.open(__FILE__, 'r') do |f|
buffer = ''
# FIONREAD in /usr/include/asm-generic/ioctls.h
f.ioctl 0x541B, buffer
buffer.unpack('I').first.should be_kind_of(Integer)
end
end
it "raises an Errno error when ioctl fails" do
File.open(__FILE__, 'r') do |f|
lambda {
# TIOCGWINSZ in /usr/include/asm-generic/ioctls.h
f.ioctl 0x5413, nil
}.should raise_error(Errno::ENOTTY)
end
end
end
end
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