Module: Cuprum::Collections::RSpec::Contracts::CommandContracts::ShouldBeADestroyOneCommandContract

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

Overview

Contract validating the behavior of a FindOne command implementation.

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/command_contracts.rb', line 287

contract do
  describe '#call' do
    let(:mapped_data) do
      defined?(super()) ? super() : data
    end
    let(:primary_key_name) { defined?(super()) ? super() : 'id' }
    let(:primary_key_type) { defined?(super()) ? super() : Integer }
    let(:invalid_primary_key_value) do
      defined?(super()) ? super() : 100
    end
    let(:valid_primary_key_value) do
      defined?(super()) ? super() : 0
    end

    it 'should validate the :primary_key keyword' do
      expect(command)
        .to validate_parameter(:call, :primary_key)
        .using_constraint(primary_key_type)
    end

    describe 'with an invalid primary key' do
      let(:primary_key) { invalid_primary_key_value }
      let(:expected_error) do
        Cuprum::Collections::Errors::NotFound.new(
          attribute_name:  primary_key_name,
          attribute_value: primary_key,
          collection_name: collection_name,
          primary_key:     true
        )
      end

      it 'should return a failing result' do
        expect(command.call(primary_key: primary_key))
          .to be_a_failing_result
          .with_error(expected_error)
      end

      it 'should not remove an entity from the collection' do
        expect { command.call(primary_key: primary_key) }
          .not_to(change { query.reset.count })
      end
    end

    context 'when the collection has many items' do
      let(:data) { fixtures_data }
      let(:matching_data) do
        mapped_data.find do |item|
          item[primary_key_name.to_s] == primary_key
        end
      end
      let!(:expected_data) do
        defined?(super()) ? super() : matching_data
      end

      describe 'with an invalid primary key' do
        let(:primary_key) { invalid_primary_key_value }
        let(:expected_error) do
          Cuprum::Collections::Errors::NotFound.new(
            attribute_name:  primary_key_name,
            attribute_value: primary_key,
            collection_name: collection_name,
            primary_key:     true
          )
        end

        it 'should return a failing result' do
          expect(command.call(primary_key: primary_key))
            .to be_a_failing_result
            .with_error(expected_error)
        end

        it 'should not remove an entity from the collection' do
          expect { command.call(primary_key: primary_key) }
            .not_to(change { query.reset.count })
        end
      end

      describe 'with a valid primary key' do
        let(:primary_key) { valid_primary_key_value }

        it 'should return a passing result' do
          expect(command.call(primary_key: primary_key))
            .to be_a_passing_result
            .with_value(expected_data)
        end

        it 'should remove an entity from the collection' do
          expect { command.call(primary_key: primary_key) }
            .to(
              change { query.reset.count }.by(-1)
            )
        end

        it 'should remove the entity from the collection' do
          command.call(primary_key: primary_key)

          expect(query.map { |item| item[primary_key_name.to_s] })
            .not_to include primary_key
        end
      end
    end
  end
end