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require 'spec_helper'
describe Immutable::Hash do
[:find, :detect].each do |method|
describe "##{method}" do
[
[[], 'A', nil],
[[], nil, nil],
[['A' => 'aye'], 'A', ['A', 'aye']],
[['A' => 'aye'], 'B', nil],
[['A' => 'aye'], nil, nil],
[['A' => 'aye', 'B' => 'bee', nil => 'NIL'], 'A', ['A', 'aye']],
[['A' => 'aye', 'B' => 'bee', nil => 'NIL'], 'B', ['B', 'bee']],
[['A' => 'aye', 'B' => 'bee', nil => 'NIL'], nil, [nil, 'NIL']],
[['A' => 'aye', 'B' => 'bee', nil => 'NIL'], 'C', nil],
].each do |values, key, expected|
describe "on #{values.inspect}" do
let(:hash) { H[*values] }
describe 'with a block' do
it "returns #{expected.inspect}" do
hash.send(method) { |k, v| k == key }.should == expected
end
end
describe 'without a block' do
it 'returns an Enumerator' do
result = hash.send(method)
result.class.should be(Enumerator)
result.each { |k,v| k == key }.should == expected
end
end
end
end
it 'stops iterating when the block returns true' do
yielded = []
H[a: 1, b: 2].find { |k,v| yielded << k; true }
yielded.size.should == 1
end
end
end
end
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