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require 'tool/thread_local'
describe Tool::ThreadLocal do
describe :__getobj__ do
subject { Tool::ThreadLocal.new }
specify 'normal access' do
subject[:foo] = 'bar'
expect(subject[:foo]).to be == 'bar'
end
specify 'concurrent access' do
subject[:foo] = 'bar'
value = Thread.new { subject[:foo] = 'baz' }.value
expect(value).to be == 'baz'
expect(subject[:foo]).to be == 'bar'
end
specify 'with an array as value' do
list = Tool::ThreadLocal.new([])
foo = Thread.new { 10.times { list << :foo; sleep(0.01) }; list.to_a }
bar = Thread.new { 10.times { list << :bar; sleep(0.01) }; list.to_a }
expect(list).to be_empty
list << :list
expect(list) .to be == [ :list ]
expect(foo.value) .to be == [ :foo ] * 10
expect(bar.value) .to be == [ :bar ] * 10
end
specify 'deals with garbage collected threads' do
subject[:a] = 'A'
Thread.new do
subject[:b] = 'B'
Thread.new do
subject[:c] = 'C'
end.value
end.value
GC.start
expect(subject[:a]).to be == 'A'
end
end
describe :__size__ do
subject { Tool::ThreadLocal.new }
specify 'with one thread' do
subject[:a] = 'A'
expect(subject.__size__).to be == 1
end
specify 'with multiple threads' do
subject[:a] = 'A'
thread = Thread.new { subject[:b] = 'B'; sleep }
sleep 0.01
expect(subject.__size__).to be == 2
thread.kill
end
specify 'with dead threads' do
next if defined? RUBY_ENGINE and RUBY_ENGINE == 'rbx'
subject[:a] = 'A'
Thread.new do
subject[:b] = 'B'
Thread.new do
subject[:c] = 'C'
end.value
end.value
GC.start
expect(subject.__size__).to be == 1
end
end
end
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