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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Gitlab::Popen do
let(:path) { Rails.root.join('tmp').to_s }
before do
@klass = Class.new(Object)
@klass.send(:include, described_class)
end
describe '.popen_with_detail' do
subject { @klass.new.popen_with_detail(cmd) }
let(:cmd) { %W[#{Gem.ruby} -e $stdout.puts(1);$stderr.puts(2);exit(3)] }
it { expect(subject.cmd).to eq(cmd) }
it { expect(subject.stdout).to eq("1\n") }
it { expect(subject.stderr).to eq("2\n") }
it { expect(subject.status.exitstatus).to eq(3) }
it { expect(subject.duration).to be_kind_of(Numeric) }
end
context 'zero status' do
before do
@output, @status = @klass.new.popen(%w(ls), path)
end
it { expect(@status).to be_zero }
it { expect(@output).to include('tests') }
end
context 'non-zero status' do
before do
@output, @status = @klass.new.popen(%w(cat NOTHING), path)
end
it { expect(@status).to eq(1) }
it { expect(@output).to include('No such file or directory') }
end
context 'non-zero status with a kill' do
let(:cmd) { [Gem.ruby, "-e", "thr = Thread.new { sleep 5 }; Process.kill(9, Process.pid); thr.join"] }
before do
@output, @status = @klass.new.popen(cmd)
end
it { expect(@status).to eq(9) }
it { expect(@output).to be_empty }
end
context 'unsafe string command' do
it 'raises an error when it gets called with a string argument' do
expect { @klass.new.popen('ls', path) }.to raise_error(RuntimeError)
end
end
context 'with custom options' do
let(:vars) { { 'foobar' => 123, 'PWD' => path } }
let(:options) { { chdir: path } }
it 'calls popen3 with the provided environment variables' do
expect(Open3).to receive(:popen3).with(vars, 'ls', options)
@output, @status = @klass.new.popen(%w(ls), path, { 'foobar' => 123 })
end
end
context 'with a process that writes a lot of data to stderr' do
let(:test_string) { 'The quick brown fox jumped over the lazy dog' }
# The pipe buffer is typically 64K. This string is about 440K.
let(:spew_command) { ['bash', '-c', "for i in {1..10000}; do echo '#{test_string}' 1>&2; done"] }
it 'returns zero' do
output, status = @klass.new.popen(spew_command, path)
expect(output).to include(test_string)
expect(status).to eq(0)
end
end
context 'without a directory argument' do
before do
@output, @status = @klass.new.popen(%w(ls))
end
it { expect(@status).to be_zero }
it { expect(@output).to include('spec') }
end
context 'use stdin' do
before do
@output, @status = @klass.new.popen(%w[cat]) { |stdin| stdin.write 'hello' }
end
it { expect(@status).to be_zero }
it { expect(@output).to eq('hello') }
end
context 'when binary is absent' do
it 'raises error' do
expect do
@klass.new.popen(%w[foobar])
end.to raise_error
end
end
end
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