Contents

# encoding: utf-8

require 'spec_helper'

describe Optimizer::Relation::Operation::Unary::EmptyOperand, '#optimizable?' do
  subject { object.optimizable? }

  let(:header)   { double('Header')                                     }
  let(:relation) { double('Relation', operand: operand, header: header) }
  let(:object)   { described_class.new(relation)                        }

  context 'when the operand is empty' do
    let(:operand) { Relation::Empty.new([[:id, Integer]]) }

    it { should be(true) }
  end

  context 'when the operand is not empty' do
    let(:operand) { Relation.new([[:id, Integer]], [[1]]) }

    it { should be(false) }
  end
end

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
axiom-optimizer-0.2.0	spec/unit/axiom/optimizer/relation/operation/unary/empty_operand/optimizable_predicate_spec.rb
axiom-optimizer-0.1.1	spec/unit/axiom/optimizer/relation/operation/unary/empty_operand/optimizable_predicate_spec.rb