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require 'spec_helper'
require 'immutable/hash'
describe Immutable::Hash do
describe '#to_proc' do
context 'on Hash without default proc' do
let(:hash) { H.new('A' => 'aye') }
it 'returns a Proc instance' do
hash.to_proc.should be_kind_of(Proc)
end
it 'returns a Proc that returns the value of an existing key' do
hash.to_proc.call('A').should == 'aye'
end
it 'returns a Proc that returns nil for a missing key' do
hash.to_proc.call('B').should be_nil
end
end
context 'on Hash with a default proc' do
let(:hash) { H.new('A' => 'aye') { |key| "#{key}-VAL" } }
it 'returns a Proc instance' do
hash.to_proc.should be_kind_of(Proc)
end
it 'returns a Proc that returns the value of an existing key' do
hash.to_proc.call('A').should == 'aye'
end
it "returns a Proc that returns the result of the hash's default proc for a missing key" do
hash.to_proc.call('B').should == 'B-VAL'
hash.should == H.new('A' => 'aye')
end
end
end
end
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