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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)
require File.expand_path('../shared/write', __FILE__)
# See https://bugs.ruby-lang.org/issues/5954#note-5
platform_is_not :windows do
describe "IO#write_nonblock on a file" do
before :each do
@filename = tmp("IO_syswrite_file") + $$.to_s
File.open(@filename, "w") do |file|
file.write_nonblock("012345678901234567890123456789")
end
@file = File.open(@filename, "r+")
@readonly_file = File.open(@filename)
end
after :each do
@file.close if @file
@readonly_file.close if @readonly_file
rm_r @filename
end
it "writes all of the string's bytes but does not buffer them" do
written = @file.write_nonblock("abcde")
written.should == 5
File.open(@filename) do |file|
file.sysread(10).should == "abcde56789"
file.seek(0)
@file.fsync
file.sysread(10).should == "abcde56789"
end
end
it "checks if the file is writable if writing zero bytes" do
lambda {
@readonly_file.write_nonblock("")
}.should raise_error(IOError)
end
end
describe "IO#write_nonblock" do
it_behaves_like :io_write, :write_nonblock
end
end
describe 'IO#write_nonblock' do
before do
@read, @write = IO.pipe
end
after do
@read.close
@write.close
end
it "raises an exception extending IO::WaitWritable when the write would block" do
lambda {
loop { @write.write_nonblock('a' * 10_000) }
}.should raise_error(IO::WaitWritable) { |e|
platform_is_not :windows do
e.should be_kind_of(Errno::EAGAIN)
end
platform_is :windows do
e.should be_kind_of(Errno::EWOULDBLOCK)
end
}
end
ruby_version_is "2.3" do
context "when exception option is set to false" do
it "returns :wait_writable when the operation would block" do
loop { break if @write.write_nonblock("a" * 10_000, exception: false) == :wait_writable }
1.should == 1
end
end
end
platform_is_not :windows do
it 'sets the IO in nonblock mode' do
require 'io/nonblock'
@write.nonblock?.should == false
@write.write_nonblock('a')
@write.nonblock?.should == true
end
end
end
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