require 'cases/helper'
require 'models/post'
require 'models/comment'

module ActiveRecord
  class WhereChainTest < ActiveRecord::TestCase
    fixtures :posts

    def setup
      super
      @name = 'title'
    end

    def test_not_inverts_where_clause
      relation = Post.where.not(title: 'hello')
      expected_where_clause = Post.where(title: 'hello').where_clause.invert

      assert_equal expected_where_clause, relation.where_clause
    end

    def test_not_with_nil
      assert_raise ArgumentError do
        Post.where.not(nil)
      end
    end

    def test_association_not_eq
      expected = Arel::Nodes::Grouping.new(Comment.arel_table[@name].not_eq(Arel::Nodes::BindParam.new))
      relation = Post.joins(:comments).where.not(comments: {title: 'hello'})
      assert_equal(expected.to_sql, relation.where_clause.ast.to_sql)
    end

    def test_not_eq_with_preceding_where
      relation = Post.where(title: 'hello').where.not(title: 'world')
      expected_where_clause =
        Post.where(title: 'hello').where_clause +
        Post.where(title: 'world').where_clause.invert

      assert_equal expected_where_clause, relation.where_clause
    end

    def test_not_eq_with_succeeding_where
      relation = Post.where.not(title: 'hello').where(title: 'world')
      expected_where_clause =
        Post.where(title: 'hello').where_clause.invert +
        Post.where(title: 'world').where_clause

      assert_equal expected_where_clause, relation.where_clause
    end

    def test_chaining_multiple
      relation = Post.where.not(author_id: [1, 2]).where.not(title: 'ruby on rails')
      expected_where_clause =
        Post.where(author_id: [1, 2]).where_clause.invert +
        Post.where(title: 'ruby on rails').where_clause.invert

      assert_equal expected_where_clause, relation.where_clause
    end

    def test_rewhere_with_one_condition
      relation = Post.where(title: 'hello').where(title: 'world').rewhere(title: 'alone')
      expected = Post.where(title: 'alone')

      assert_equal expected.where_clause, relation.where_clause
    end

    def test_rewhere_with_multiple_overwriting_conditions
      relation = Post.where(title: 'hello').where(body: 'world').rewhere(title: 'alone', body: 'again')
      expected = Post.where(title: 'alone', body: 'again')

      assert_equal expected.where_clause, relation.where_clause
    end

    def test_rewhere_with_one_overwriting_condition_and_one_unrelated
      relation = Post.where(title: 'hello').where(body: 'world').rewhere(title: 'alone')
      expected = Post.where(body: 'world', title: 'alone')

      assert_equal expected.where_clause, relation.where_clause
    end

    def test_rewhere_with_range
      relation = Post.where(comments_count: 1..3).rewhere(comments_count: 3..5)

      assert_equal Post.where(comments_count: 3..5), relation
    end

    def test_rewhere_with_infinite_upper_bound_range
      relation = Post.where(comments_count: 1..Float::INFINITY).rewhere(comments_count: 3..5)

      assert_equal Post.where(comments_count: 3..5), relation
    end

    def test_rewhere_with_infinite_lower_bound_range
      relation = Post.where(comments_count: -Float::INFINITY..1).rewhere(comments_count: 3..5)

      assert_equal Post.where(comments_count: 3..5), relation
    end

    def test_rewhere_with_infinite_range
      relation = Post.where(comments_count: -Float::INFINITY..Float::INFINITY).rewhere(comments_count: 3..5)

      assert_equal Post.where(comments_count: 3..5), relation
    end
  end
end