Module: Cuprum::Collections::RSpec::Contracts::QueryContracts::WithQueryContextsContract

Extended by:
RSpec::SleepingKingStudios::Contract
Defined in:
lib/cuprum/collections/rspec/contracts/query_contracts.rb

Overview

Contract defining contexts for validating query behavior.

Instance Method Summary collapse

Instance Method Details

#apply(example_group) ⇒ Object

Adds the contract to the example group.

Parameters:

  • example_group (RSpec::Core::ExampleGroup) —

    the example group to which the contract is applied.



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# File 'lib/cuprum/collections/rspec/contracts/query_contracts.rb', line 944

contract do
  let(:filter)    { nil }
  let(:strategy)  { nil }
  let(:limit)     { nil }
  let(:offset)    { nil }
  let(:order)     { nil }

  shared_context 'when the query has limit: value' do
    let(:limit)         { 3 }
    let(:matching_data) { super()[0...limit] }
  end

  shared_context 'when the query has offset: value' do
    let(:offset)        { 2 }
    let(:matching_data) { super()[offset..] || [] }
  end

  shared_context 'when the query has order: a simple ordering' do
    let(:order)         { :title }
    let(:matching_data) { super().sort_by { |item| item['title'] } }
  end

  shared_context 'when the query has order: a complex ordering' do
    let(:order) do
      {
        author: :asc,
        title:  :desc
      }
    end
    let(:matching_data) do
      super().sort do |u, v|
        cmp = u['author'] <=> v['author']

        cmp.zero? ? (v['title'] <=> u['title']) : cmp
      end
    end
  end

  shared_context 'when the query has where: a simple block filter' do
    let(:filter) { -> { { author: 'Ursula K. LeGuin' } } }
    let(:matching_data) do
      super().select { |item| item['author'] == 'Ursula K. LeGuin' }
    end
  end

  shared_context 'when the query has where: a complex block filter' do
    let(:filter) do
      lambda do
        {
          author: equals('Ursula K. LeGuin'),
          series: not_equal('Earthsea')
        }
      end
    end
    let(:matching_data) do
      super()
        .select { |item| item['author'] == 'Ursula K. LeGuin' }
        .reject { |item| item['series'] == 'Earthsea' }
    end
  end

  shared_context 'when the query has where: a greater_than filter' do
    let(:filter) { -> { { published_at: greater_than('1970-12-01') } } }
    let(:matching_data) do
      super().select { |item| item['published_at'] > '1970-12-01' }
    end
  end

  shared_context 'when the query has where: a greater_than_or_equal_to ' \
                 'filter' \
  do
    let(:filter) do
      -> { { published_at: greater_than_or_equal_to('1970-12-01') } }
    end
    let(:matching_data) do
      super().select { |item| item['published_at'] >= '1970-12-01' }
    end
  end

  shared_context 'when the query has where: a less_than filter' do
    let(:filter) { -> { { published_at: less_than('1970-12-01') } } }
    let(:matching_data) do
      super().select { |item| item['published_at'] < '1970-12-01' }
    end
  end

  shared_context 'when the query has where: a ' \
                 'less_than_or_equal_to filter' \
  do
    let(:filter) do
      -> { { published_at: less_than_or_equal_to('1970-12-01') } }
    end
    let(:matching_data) do
      super().select { |item| item['published_at'] <= '1970-12-01' }
    end
  end

  shared_context 'when the query has where: an equal block filter' do
    let(:filter) { -> { { author: equals('Ursula K. LeGuin') } } }
    let(:matching_data) do
      super().select { |item| item['author'] == 'Ursula K. LeGuin' }
    end
  end

  shared_context 'when the query has where: a not_equal block filter' do
    let(:filter) { -> { { author: not_equal('Ursula K. LeGuin') } } }
    let(:matching_data) do
      super().reject { |item| item['author'] == 'Ursula K. LeGuin' }
    end
  end

  shared_context 'when the query has where: a not_one_of block filter' do
    let(:filter) do
      -> { { series: not_one_of(['Earthsea', 'The Lord of the Rings']) } }
    end
    let(:matching_data) do
      super().reject do |item|
        ['Earthsea', 'The Lord of the Rings'].include?(item['series'])
      end
    end
  end

  shared_context 'when the query has where: a one_of block filter' do
    let(:filter) do
      -> { { series: one_of(['Earthsea', 'The Lord of the Rings']) } }
    end
    let(:matching_data) do
      super().select do |item|
        ['Earthsea', 'The Lord of the Rings'].include?(item['series'])
      end
    end
  end

  shared_context 'when the query has multiple query options' do
    let(:filter)    { -> { { author: 'Ursula K. LeGuin' } } }
    let(:strategy)  { nil }
    let(:order)     { { title: :desc } }
    let(:limit)     { 2 }
    let(:offset)    { 1 }
    let(:matching_data) do
      super()
        .select { |item| item['author'] == 'Ursula K. LeGuin' }
        .sort { |u, v| v['title'] <=> u['title'] }
        .slice(1, 2) || []
    end
  end
end