require 'spec_helper'

describe Hashie::Extensions::StrictKeyAccess do
  class StrictKeyAccessHash < Hash
    include Hashie::Extensions::StrictKeyAccess
  end

  shared_examples_for 'StrictKeyAccess with valid key' do |options = {}|
    before { pending_for(options[:pending]) } if options[:pending]
    context 'set' do
      let(:new_value) { 42 }
      it('returns value') do
        expect(instance.send(:[]=, valid_key, new_value)).to eq new_value
      end
    end
    context 'access' do
      it('returns value') do
        expect(instance[valid_key]).to eq valid_value
      end
    end
    context 'lookup' do
      it('returns key') do
        expect(instance.key(valid_value)).to eq valid_key
      end
    end
  end
  shared_examples_for 'StrictKeyAccess with invalid key' do |options = {}|
    before { pending_for(options[:pending]) } if options[:pending]
    context 'access' do
      it('raises an error') do
        # Formatting of the error message varies on Rubinius and ruby-head
        expect { instance[invalid_key] }.to raise_error KeyError
      end
    end
    context 'lookup' do
      it('raises an error') do
        # Formatting of the error message does not vary here because raised by StrictKeyAccess
        expect { instance.key(invalid_value) }.to raise_error KeyError
      end
    end
  end
  shared_examples_for 'StrictKeyAccess raises KeyError instead of allowing defaults' do
    context '#default' do
      it 'raises an error' do
        expect { instance.default(invalid_key) }
          .to raise_error Hashie::Extensions::StrictKeyAccess::DefaultError
      end
    end
    context '#default=' do
      it 'raises an error' do
        expect { instance.default = invalid_key }
          .to raise_error Hashie::Extensions::StrictKeyAccess::DefaultError
      end
    end
    context '#default_proc' do
      it 'raises an error' do
        expect { instance.default_proc }
          .to raise_error Hashie::Extensions::StrictKeyAccess::DefaultError
      end
    end
    context '#default_proc=' do
      it 'raises an error' do
        expect { instance.default_proc = proc {} }
          .to raise_error Hashie::Extensions::StrictKeyAccess::DefaultError
      end
    end
  end

  let(:klass) { StrictKeyAccessHash }
  let(:instance) { StrictKeyAccessHash.new(*initialization_args) }
  let(:initialization_args) do
    [
      { valid_key => valid_value }
    ]
  end
  let(:valid_key) { :abc }
  let(:valid_value) { 'def' }
  let(:invalid_key) { :mega }
  let(:invalid_value) { 'death' }

  context '.new' do
    context 'no defaults at initialization' do
      let(:initialization_args) { [] }
      before do
        instance.merge!(valid_key => valid_value)
      end
      it_behaves_like 'StrictKeyAccess with valid key'
      it_behaves_like 'StrictKeyAccess with invalid key'
      it_behaves_like 'StrictKeyAccess raises KeyError instead of allowing defaults'
    end
    context 'with defaults at initialization' do
      before do
        instance.merge!(valid_key => valid_value)
      end
      it_behaves_like 'StrictKeyAccess with valid key'
      it_behaves_like 'StrictKeyAccess with invalid key'
      it_behaves_like 'StrictKeyAccess raises KeyError instead of allowing defaults'
    end
    it_behaves_like 'StrictKeyAccess with invalid key'
    it_behaves_like 'StrictKeyAccess raises KeyError instead of allowing defaults'
  end

  context '.[]' do
    let(:instance) { StrictKeyAccessHash[*initialization_args] }
    it_behaves_like 'StrictKeyAccess with valid key', pending: { engine: 'rbx' }
    it_behaves_like 'StrictKeyAccess with invalid key', pending: { engine: 'rbx' }
    it_behaves_like 'StrictKeyAccess raises KeyError instead of allowing defaults'
  end
end