Contents

require 'spec_helper'

describe WithFilters::HashExtraction do
  describe '#extract_hash_value(hash, key)' do
    let(:params) {{
      'fizz' => 'buzz',
      foo:       'bar',
      one:      {'two' => {'three' =>  3}}
    }}
    subject {
      class TestHashExtraction
        include WithFilters::HashExtraction
      end
      TestHashExtraction.new
    }

    context 'where a regular hash key is used' do
      context 'where the value is a Symbol' do
        it 'returns the value from the hash' do
          subject.extract_hash_value(params, :foo).should  == params[:foo]
          subject.extract_hash_value(params, :fizz).should == params['fizz']
        end
      end

      context 'where the value is a String' do
        it 'returns the value from the hash' do
          subject.extract_hash_value(params, 'foo').should  == params[:foo]
          subject.extract_hash_value(params, 'fizz').should == params['fizz']
        end
      end

      context 'where the value is not found' do
        it 'returns nil' do
          subject.extract_hash_value(params, 'yo').should be nil
        end
      end
    end

    context 'where a nested hash key is used' do
      it 'returns the value from the hash' do
        subject.extract_hash_value(params, 'one[two][three]').should == params[:one]['two']['three']
      end

      context 'where the value is not found' do
        it 'returns nil' do
          subject.extract_hash_value(params, 'yo[one]').should be nil
        end
      end
    end
  end
end

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
with_filters-0.1.2	spec/hash_extraction_spec.rb
with_filters-0.1.1	spec/hash_extraction_spec.rb
with_filters-0.1.0	spec/hash_extraction_spec.rb