require 'helper'

module Arel
  module Nodes
    describe 'Case' do
      describe '#initialize' do
        it 'sets case expression from first argument' do
          node = Case.new 'foo'

          assert_equal 'foo', node.case
        end

        it 'sets default case from second argument' do
          node = Case.new nil, 'bar'

          assert_equal 'bar', node.default
        end
      end

      describe '#clone' do
        it 'clones case, conditions and default' do
          foo = Nodes.build_quoted 'foo'

          node = Case.new
          node.case = foo
          node.conditions = [When.new(foo, foo)]
          node.default = foo

          dolly = node.clone

          assert_equal dolly.case, node.case
          refute_same  dolly.case, node.case

          assert_equal dolly.conditions, node.conditions
          refute_same  dolly.conditions, node.conditions

          assert_equal dolly.default, node.default
          refute_same  dolly.default, node.default
        end
      end

      describe 'equality' do
        it 'is equal with equal ivars' do
          foo = Nodes.build_quoted 'foo'
          one = Nodes.build_quoted 1
          zero = Nodes.build_quoted 0

          case1 = Case.new foo
          case1.conditions = [When.new(foo, one)]
          case1.default = Else.new zero

          case2 = Case.new foo
          case2.conditions = [When.new(foo, one)]
          case2.default = Else.new zero

          array = [case1, case2]

          assert_equal 1, array.uniq.size
        end

        it 'is not equal with different ivars' do
          foo = Nodes.build_quoted 'foo'
          bar = Nodes.build_quoted 'bar'
          one = Nodes.build_quoted 1
          zero = Nodes.build_quoted 0

          case1 = Case.new foo
          case1.conditions = [When.new(foo, one)]
          case1.default = Else.new zero

          case2 = Case.new foo
          case2.conditions = [When.new(bar, one)]
          case2.default = Else.new zero

          array = [case1, case2]

          assert_equal 2, array.uniq.size
        end
      end
    end
  end
end