Module: Cuprum::Collections::RSpec::Contracts::Scopes::CriteriaContracts::ShouldParseCriteriaFromAHashContract

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

Overview

Contract validating the parsing of criteria from a Hash.

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/scopes/criteria_contracts.rb', line 1774

contract do
  describe 'with nil' do
    let(:error_message) do
      'value must be a Hash with String or Symbol keys'
    end

    it 'should raise an exception' do
      expect { parse_criteria(nil) }
        .to raise_error ArgumentError, error_message
    end
  end

  describe 'with an Object' do
    let(:error_message) do
      'value must be a Hash with String or Symbol keys'
    end

    it 'should raise an exception' do
      expect { parse_criteria(Object.new.freeze) }
        .to raise_error ArgumentError, error_message
    end
  end

  describe 'with a Hash with invalid keys' do
    let(:error_message) do
      'value must be a Hash with String or Symbol keys'
    end
    let(:value)         { { nil => 'invalid' } }

    it 'should raise an exception' do
      expect { parse_criteria(value) }
        .to raise_error ArgumentError, error_message
    end
  end

  describe 'with an empty Hash' do
    let(:value) { {} }

    it { expect(parse_criteria(value)).to be == [] }
  end

  describe 'with a Hash with one key' do
    let(:operators) { Cuprum::Collections::Queries::Operators }
    let(:value) do
      { 'title' => 'A Wizard of Earthsea' }
    end
    let(:expected) do
      [['title', operators::EQUAL, 'A Wizard of Earthsea']]
    end

    it { expect(parse_criteria(value)).to be == expected }
  end

  describe 'with a Hash with many String keys' do
    let(:operators) { Cuprum::Collections::Queries::Operators }
    let(:value) do
      {
        'title'  => 'A Wizard of Earthsea',
        'author' => 'Ursula K. LeGuin',
        'series' => 'Earthsea'
      }
    end
    let(:expected) do
      [
        ['title', operators::EQUAL, 'A Wizard of Earthsea'],
        ['author', operators::EQUAL, 'Ursula K. LeGuin'],
        ['series', operators::EQUAL, 'Earthsea']
      ]
    end

    it { expect(parse_criteria(value)).to be == expected }
  end

  describe 'with a Hash with many Symbol keys' do
    let(:operators) { Cuprum::Collections::Queries::Operators }
    let(:value) do
      {
        title:  'A Wizard of Earthsea',
        author: 'Ursula K. LeGuin',
        series: 'Earthsea'
      }
    end
    let(:expected) do
      [
        ['title', operators::EQUAL, 'A Wizard of Earthsea'],
        ['author', operators::EQUAL, 'Ursula K. LeGuin'],
        ['series', operators::EQUAL, 'Earthsea']
      ]
    end

    it { expect(parse_criteria(value)).to be == expected }
  end
end