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require 'spec_helper'
describe Immutable::Hash do
describe '#each_with_index' do
let(:hash) { H['A' => 'aye', 'B' => 'bee', 'C' => 'see'] }
describe 'with a block (internal iteration)' do
it 'returns self' do
hash.each_with_index {}.should be(hash)
end
it 'yields all key/value pairs with numeric indexes' do
actual_pairs = {}
indexes = []
hash.each_with_index { |(key, value), index| actual_pairs[key] = value; indexes << index }
actual_pairs.should == { 'A' => 'aye', 'B' => 'bee', 'C' => 'see' }
indexes.sort.should == [0, 1, 2]
end
end
describe 'with no block' do
it 'returns an Enumerator' do
hash.each_with_index.should be_kind_of(Enumerator)
hash.each_with_index.to_a.map(&:first).sort.should eql([['A', 'aye'], ['B', 'bee'], ['C', 'see']])
hash.each_with_index.to_a.map(&:last).should eql([0,1,2])
end
end
end
end
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