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require 'spec_helper'
describe Immutable::SortedSet do
describe '#take_while' do
[
[[], []],
[['A'], ['A']],
[%w[A B C], %w[A B]],
].each do |values, expected|
context "on #{values.inspect}" do
let(:sorted_set) { SS[*values] }
context 'with a block' do
it "returns #{expected.inspect}" do
sorted_set.take_while { |item| item < 'C' }.should eql(SS[*expected])
end
it 'preserves the original' do
sorted_set.take_while { |item| item < 'C' }
sorted_set.should eql(SS[*values])
end
end
context 'without a block' do
it 'returns an Enumerator' do
sorted_set.take_while.class.should be(Enumerator)
sorted_set.take_while.each { |item| item < 'C' }.should eql(SS[*expected])
end
end
end
end
end
end
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