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require 'spec_helper'
describe Immutable do
describe '#cycle' do
it 'is lazy' do
-> { Immutable.stream { fail }.cycle }.should_not raise_error
end
context 'with an empty list' do
it 'returns an empty list' do
L.empty.cycle.should be_empty
end
end
context 'with a non-empty list' do
let(:list) { L['A', 'B', 'C'] }
it 'preserves the original' do
list.cycle
list.should == L['A', 'B', 'C']
end
it 'infinitely cycles through all values' do
list.cycle.take(7).should == L['A', 'B', 'C', 'A', 'B', 'C', 'A']
end
end
end
end
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