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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)
describe "IO#read_nonblock" do
before(:each) do
@read, @write = IO.pipe
end
after(:each) do
@read.close rescue nil
@write.close rescue nil
end
it "raises EAGAIN when there is no data" do
lambda { @read.read_nonblock(5) }.should raise_error(Errno::EAGAIN)
end
ruby_version_is "1.9" do
it "raises IO::WaitReadable when there is no data" do
lambda { @read.read_nonblock(5) }.should raise_error(IO::WaitReadable)
end
end
it "returns at most the number of bytes requested" do
@write << "hello"
@read.read_nonblock(4).should == "hell"
end
it "returns less data if that is all that is available" do
@write << "hello"
@read.read_nonblock(10).should == "hello"
end
not_compliant_on :rubinius, :jruby do
ruby_version_is ""..."1.9" do
it "changes the behavior of #read to nonblocking" do
@write << "hello"
@read.read_nonblock(5)
# Yes, use normal IO#read here. #read_nonblock has changed the internal
# flags of @read to be nonblocking, so now any normal read calls raise
# EAGAIN if there is no data.
lambda { @read.read(5) }.should raise_error(Errno::EAGAIN)
end
end
# This feature was changed in 1.9
# see also: [ruby-dev:25101] http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-dev/25101
# and #2469 http://redmine.ruby-lang.org/issues/show/2469
end
it "raises IOError on closed stream" do
lambda { IOSpecs.closed_io.read_nonblock(5) }.should raise_error(IOError)
end
it "raises EOFError when the end is reached" do
@write << "hello"
@write.close
@read.read_nonblock(5)
lambda { @read.read_nonblock(5) }.should raise_error(EOFError)
end
end
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