gitlab-org--gitlab-foss/spec/lib/gitlab/sql/union_spec.rb
2017-07-27 14:31:53 +02:00

26 lines
853 B
Ruby

require 'spec_helper'
describe Gitlab::SQL::Union do
let(:relation_1) { User.where(email: 'alice@example.com').select(:id) }
let(:relation_2) { User.where(email: 'bob@example.com').select(:id) }
def to_sql(relation)
relation.reorder(nil).to_sql
end
describe '#to_sql' do
it 'returns a String joining relations together using a UNION' do
union = described_class.new([relation_1, relation_2])
expect(union.to_sql).to eq("#{to_sql(relation_1)}\nUNION\n#{to_sql(relation_2)}")
end
it 'skips Model.none segements' do
empty_relation = User.none
union = described_class.new([empty_relation, relation_1, relation_2])
expect{User.where("users.id IN (#{union.to_sql})").to_a}.not_to raise_error
expect(union.to_sql).to eq("#{to_sql(relation_1)}\nUNION\n#{to_sql(relation_2)}")
end
end
end