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require_relative '../../spec_helper'
ruby_version_is '2.5' do
describe 'Thread#fetch' do
describe 'with 2 arguments' do
it 'returns the value of the fiber-local variable if value has been assigned' do
th = Thread.new { Thread.current[:cat] = 'meow' }
th.join
th.fetch(:cat, true).should == 'meow'
end
it "returns the default value if fiber-local variable hasn't been assigned" do
th = Thread.new {}
th.join
th.fetch(:cat, true).should == true
end
end
describe 'with 1 argument' do
it 'raises a KeyError when the Thread does not have a fiber-local variable of the same name' do
th = Thread.new {}
th.join
-> { th.fetch(:cat) }.should raise_error(KeyError)
end
it 'returns the value of the fiber-local variable if value has been assigned' do
th = Thread.new { Thread.current[:cat] = 'meow' }
th.join
th.fetch(:cat).should == 'meow'
end
end
it 'raises an ArgumentError when not passed one or two arguments' do
-> { Thread.current.fetch() }.should raise_error(ArgumentError)
-> { Thread.current.fetch(1, 2, 3) }.should raise_error(ArgumentError)
end
end
end
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