Contents

# encoding: utf-8

require 'spec_helper'

describe Optimizer::Algebra::Difference::EmptyLeft, '#optimize' do
  subject { object.optimize }

  let(:header)   { Relation::Header.new([ [ :id, Integer ] ]) }
  let(:left)     { Relation::Empty.new(header)                }
  let(:right)    { Relation.new(header, [ [ 1 ] ].each)       }
  let(:relation) { left.difference(right)                     }
  let(:object)   { described_class.new(relation)              }

  before do
    object.should be_optimizable
  end

  it { should equal(left) }
end

Version data entries

4 entries across 4 versions & 1 rubygems

Version	Path
veritas-optimizer-0.0.7	spec/unit/veritas/optimizer/algebra/difference/empty_left/optimize_spec.rb
veritas-optimizer-0.0.6	spec/unit/veritas/optimizer/algebra/difference/empty_left/optimize_spec.rb
veritas-optimizer-0.0.5	spec/unit/veritas/optimizer/algebra/difference/empty_left/optimize_spec.rb
veritas-optimizer-0.0.4	spec/unit/veritas/optimizer/algebra/difference/empty_left/optimize_spec.rb