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require_relative '../../spec_helper'
require_relative 'shared/read'
platform_is_not :windows do
describe 'ARGF.read_nonblock' do
it_behaves_like :argf_read, :read_nonblock
before do
@file1_name = fixture(__FILE__, 'file1.txt')
@file2_name = fixture(__FILE__, 'file2.txt')
@file1 = File.read(@file1_name)
@file2 = File.read(@file2_name)
@chunk1 = File.read(@file1_name, 4)
@chunk2 = File.read(@file2_name, 4)
end
it 'reads up to the given amount of bytes' do
argf [@file1_name] do
@argf.read_nonblock(4).should == @chunk1
end
end
describe 'when using multiple files' do
it 'reads up to the given amount of bytes from the first file' do
argf [@file1_name, @file2_name] do
@argf.read_nonblock(4).should == @chunk1
end
end
it 'returns an empty String when reading after having read the first file in its entirety' do
argf [@file1_name, @file2_name] do
@argf.read_nonblock(File.size(@file1_name)).should == @file1
@argf.read_nonblock(4).should == ''
end
end
end
it 'reads up to the given bytes from STDIN' do
stdin = ruby_exe('print ARGF.read_nonblock(4)', :args => "< #{@file1_name}")
stdin.should == @chunk1
end
it 'reads up to the given bytes from a file when a file and STDIN are present' do
stdin = ruby_exe("print ARGF.read_nonblock(4)", :args => "#{@file1_name} - < #{@file2_name}")
stdin.should == @chunk1
end
context "with STDIN" do
before do
@r, @w = IO.pipe
@stdin = $stdin
$stdin = @r
end
after do
$stdin = @stdin
@w.close
@r.close unless @r.closed?
end
it 'raises IO::EAGAINWaitReadable when empty' do
argf ['-'] do
-> {
@argf.read_nonblock(4)
}.should raise_error(IO::EAGAINWaitReadable)
end
end
it 'returns :wait_readable when the :exception is set to false' do
argf ['-'] do
@argf.read_nonblock(4, nil, exception: false).should == :wait_readable
end
end
end
end
end
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