test/test_expressions.rb


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29

require 'helper'

module Arel
  describe "Expressions" do
    before do
      @table = Table.new(:users)
    end

    describe "average" do
      it "aliases the average as avg_id by default" do
        @table[:score].average.to_sql.must_be_like %{
          AVG("users"."score") AS avg_id
        }
      end

      it "aliases the average as another string" do
        @table[:score].average("my_alias").to_sql.must_be_like %{
          AVG("users"."score") AS my_alias
        }
      end

      it "omits the alias if nil" do
        @table[:score].average(nil).to_sql.must_be_like %{
          AVG("users"."score")
        }
      end
    end
  end
end