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module Concurrent
RSpec.describe Array do
let!(:ary) { described_class.new }
describe '.[]' do
describe 'when initializing with no arguments' do
it do
expect(described_class[]).to be_empty
end
end
describe 'when initializing with arguments' do
it 'creates an array with the given objects' do
expect(described_class[:hello, :world]).to eq [:hello, :world]
end
end
end
describe '.new' do
describe 'when initializing with no arguments' do
it do
expect(described_class.new).to be_empty
end
end
describe 'when initializing with a size argument' do
let(:size) { 3 }
it 'creates an array with size elements set to nil' do
expect(described_class.new(size)).to eq [nil, nil, nil]
end
describe 'when initializing with a default value argument' do
let(:default_value) { :ruby }
it 'creates an array with size elements set to the default value' do
expect(described_class.new(size, default_value)).to eq [:ruby, :ruby, :ruby]
end
end
describe 'when initializing with a block argument' do
let(:block_argument) { proc { |index| :"ruby#{index}" } }
it 'creates an array with size elements set to the default value' do
expect(described_class.new(size, &block_argument)).to eq [:ruby0, :ruby1, :ruby2]
end
end
end
describe 'when initializing with another array as an argument' do
let(:other_array) { [:hello, :world] }
let(:fake_other_array) { double('Fake array', to_ary: other_array) }
it 'creates a new array' do
expect(described_class.new(other_array)).to_not be other_array
end
it 'creates an array with the same contents as the other array' do
expect(described_class.new(other_array)).to eq [:hello, :world]
end
it 'creates an array with the results of calling #to_ary on the other array' do
expect(described_class.new(fake_other_array)).to eq [:hello, :world]
end
end
end
context 'concurrency' do
it do
(1..Concurrent::ThreadSafe::Test::THREADS).map do |i|
in_thread(ary) do |ary|
1000.times do
ary << i
ary.each { |x| x * 2 }
ary.shift
ary.last
end
end
end.map(&:join)
expect(ary).to be_empty
end
end
describe '#slice' do
# This is mostly relevant on Rubinius and TruffleRuby
it 'correctly initializes the monitor' do
ary.concat([0, 1, 2, 3, 4, 5, 6, 7, 8])
sliced = ary.slice!(0..2)
expect { sliced[0] }.not_to raise_error
end
end
end
end
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