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require 'spec_helper'
describe Immutable::List do
describe '#uniq' do
it 'is lazy' do
-> { Immutable.stream { fail }.uniq }.should_not raise_error
end
context 'when passed a block' do
it 'uses the block to identify duplicates' do
L['a', 'A', 'b'].uniq(&:upcase).should eql(Immutable::List['a', 'b'])
end
end
[
[[], []],
[['A'], ['A']],
[%w[A B C], %w[A B C]],
[%w[A B A C C], %w[A B C]],
].each do |values, expected|
context "on #{values.inspect}" do
let(:list) { L[*values] }
it 'preserves the original' do
list.uniq
list.should eql(L[*values])
end
it "returns #{expected.inspect}" do
list.uniq.should eql(L[*expected])
end
end
end
end
end
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