Contents

# encoding: utf-8

require 'spec_helper'

describe Optimizer::Function::Predicate::Comparable::NeverEquivalent, '#optimizable?' do
  subject { object.optimizable? }

  let(:described_class) { Class.new(Optimizer::Function::Predicate)      }
  let(:attribute)       { Attribute::Integer.new(:id, size: 1..10)       }
  let(:predicate)       { Function::Predicate::Equality.new(left, right) }
  let(:object)          { described_class.new(predicate)                 }

  before do
    described_class.class_eval { include Optimizer::Function::Predicate::Comparable::NeverEquivalent }

    expect(predicate).to be_kind_of(Function::Predicate::Comparable)
  end

  context 'when left is a constant and is valid' do
    let(:left)  { 1         }
    let(:right) { attribute }

    it { should be(false) }
  end

  context 'when left is a constand and is not valid' do
    let(:left)  { 0         }
    let(:right) { attribute }

    it { should be(true) }
  end

  context 'when right is a constant and is valid' do
    let(:left)  { attribute }
    let(:right) { 1         }

    it { should be(false) }
  end

  context 'when right is a constant and is not valid' do
    let(:left)  { attribute }
    let(:right) { 0         }

    it { should be(true) }
  end

  context 'when left and right are joinable' do
    let(:left)  { attribute }
    let(:right) { attribute }

    it { should be(false) }
  end

  context 'when left and right are not joinable' do
    let(:left)  { attribute                                 }
    let(:right) { Attribute::Integer.new(:id, size: -10..0) }

    it { should be(true) }
  end

  context 'when left is nil' do
    let(:left)  { nil       }
    let(:right) { attribute }

    it { should be(true) }
  end

  context 'when right is nil' do
    let(:left)  { attribute }
    let(:right) { nil       }

    it { should be(true) }
  end
end

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
axiom-optimizer-0.2.0	spec/unit/axiom/optimizer/function/predicate/comparable/never_equivalent/optimizable_predicate_spec.rb
axiom-optimizer-0.1.1	spec/unit/axiom/optimizer/function/predicate/comparable/never_equivalent/optimizable_predicate_spec.rb