Contents

require 'spec_helper'

describe 'Veritas::Optimizer::Algebra::Rename#aliases' do
  subject { object.aliases }

  let(:klass)   { Optimizer::Algebra::Rename                 }
  let(:header)  { Relation::Header.new([ [ :id, Integer ] ]) }
  let(:base)    { Relation.new(header, [ [ 1 ] ].each)       }
  let(:aliases) { { :id => :other_id }                       }
  let(:object)  { klass.new(relation)                        }

  before do
    object.operation.should be_kind_of(Algebra::Rename)
  end

  context 'when the operand is a rename' do
    let(:relation) { base.rename(aliases).rename(:other_id => :another_id) }

    it { should eql(Algebra::Rename::Aliases.coerce(header, :id => :another_id)) }
  end

  context 'when the operand is not a rename' do
    let(:relation) { base.rename(aliases) }

    it { should eql(Algebra::Rename::Aliases.coerce(header, aliases)) }
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
veritas-0.0.1	spec/unit/veritas/optimizer/algebra/rename/aliases_spec.rb