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require 'spec_helper'
describe Immutable::Hash do
[:reduce, :inject].each do |method|
describe "##{method}" do
context 'when empty' do
it 'returns the memo' do
H.empty.send(method, 'ABC') {}.should == 'ABC'
end
end
context 'when not empty' do
let(:hash) { H['A' => 'aye', 'B' => 'bee', 'C' => 'see'] }
context 'with a block' do
it 'returns the final memo' do
hash.send(method, 0) { |memo, key, value| memo + 1 }.should == 3
end
end
context 'with no block' do
let(:hash) { H[a: 1, b: 2] }
it 'uses a passed string as the name of a method to use instead' do
[[:a, 1, :b, 2], [:b, 2, :a, 1]].include?(hash.send(method, '+')).should == true
end
it 'uses a passed symbol as the name of a method to use instead' do
[[:a, 1, :b, 2], [:b, 2, :a, 1]].include?(hash.send(method, :+)).should == true
end
end
end
end
end
end
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