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require 'spec_helper'
describe Immutable::Hash do
let(:hash) { H[values] }
describe '#all?' do
context 'when empty' do
let(:values) { H.new }
context 'without a block' do
it 'returns true' do
hash.all?.should == true
end
end
context 'with a block' do
it 'returns true' do
hash.all? { false }.should == true
end
end
end
context 'when not empty' do
let(:values) { { 'A' => 1, 'B' => 2, 'C' => 3 } }
context 'without a block' do
it 'returns true' do
hash.all?.should == true
end
end
context 'with a block' do
it 'returns true if the block always returns true' do
hash.all? { true }.should == true
end
it 'returns false if the block ever returns false' do
hash.all? { |k,v| k != 'C' }.should == false
end
it 'propagates an exception from the block' do
-> { hash.all? { |k,v| raise 'help' } }.should raise_error(RuntimeError)
end
it 'stops iterating as soon as the block returns false' do
yielded = []
hash.all? { |k,v| yielded << k; false }
yielded.size.should == 1
end
end
end
end
end
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