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require 'spec_helper'
describe Immutable::List do
describe '#zip' do
it 'is lazy' do
-> { Immutable.stream { fail }.zip(Immutable.stream { fail }) }.should_not raise_error
end
[
[[], [], []],
[['A'], ['aye'], [L['A', 'aye']]],
[['A'], [], [L['A', nil]]],
[[], ['A'], [L[nil, 'A']]],
[%w[A B C], %w[aye bee see], [L['A', 'aye'], L['B', 'bee'], L['C', 'see']]],
].each do |left, right, expected|
context "on #{left.inspect} and #{right.inspect}" do
it "returns #{expected.inspect}" do
L[*left].zip(L[*right]).should eql(L[*expected])
end
end
end
end
end
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