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require 'spec_helper'
require 'set'
describe Immutable::Set do
let(:set) { S['A', 'B', 'C'] }
describe '#each' do
let(:each) { set.each(&block) }
context 'without a block' do
let(:block) { nil }
it 'returns an Enumerator' do
expect(each.class).to be(Enumerator)
expect(each.to_a).to eq(set.to_a)
end
end
context 'with an empty block' do
let(:block) { ->(item) {} }
it 'returns self' do
expect(each).to be(set)
end
end
context 'with a block' do
let(:items) { ::Set.new }
let(:values) { ::Set.new(%w[A B C]) }
let(:block) { ->(item) { items << item } }
before(:each) { each }
it 'yields all values' do
expect(items).to eq(values)
end
end
it 'yields both of a pair of colliding keys' do
set = S[DeterministicHash.new('a', 1010), DeterministicHash.new('b', 1010)]
yielded = []
set.each { |obj| yielded << obj }
yielded.map(&:value).sort.should == ['a', 'b']
end
end
end
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