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require 'spec_helper'
describe Immutable::SortedSet do
let(:sorted_set) { SS['B', 'C', 'D'] }
[:add, :<<].each do |method|
describe "##{method}" do
context 'with a unique value' do
it 'preserves the original' do
sorted_set.send(method, 'A')
sorted_set.should eql(SS['B', 'C', 'D'])
end
it 'returns a copy with the superset of values (in order)' do
sorted_set.send(method, 'A').should eql(SS['A', 'B', 'C', 'D'])
end
end
context 'with a duplicate value' do
it 'preserves the original values' do
sorted_set.send(method, 'C')
sorted_set.should eql(SS['B', 'C', 'D'])
end
it 'returns self' do
sorted_set.send(method, 'C').should equal(sorted_set)
end
end
context 'on a set ordered by a comparator' do
it 'inserts the new item in the correct place' do
s = SS.new(['tick', 'pig', 'hippopotamus'], &:length)
s.add('giraffe').to_a.should == ['pig', 'tick', 'giraffe', 'hippopotamus']
end
end
end
end
describe '#add?' do
context 'with a unique value' do
it 'preserves the original' do
sorted_set.add?('A')
sorted_set.should eql(SS['B', 'C', 'D'])
end
it 'returns a copy with the superset of values' do
sorted_set.add?('A').should eql(SS['A', 'B', 'C', 'D'])
end
end
context 'with a duplicate value' do
it 'preserves the original values' do
sorted_set.add?('C')
sorted_set.should eql(SS['B', 'C', 'D'])
end
it 'returns false' do
sorted_set.add?('C').should equal(false)
end
end
end
end
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