blob: 73beef06855193063d40b1ed842e539c301f5d77 (
plain)
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
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
# frozen_string_literal: true
RSpec.shared_examples 'SQL set operator' do |operator_keyword|
operator_keyword = operator_keyword.upcase
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 '.operator_keyword' do
it { expect(described_class.operator_keyword).to eq operator_keyword }
end
describe '#to_sql' do
it "returns a String joining relations together using a #{operator_keyword}" do
set_operator = described_class.new([relation_1, relation_2])
expect(set_operator.to_sql).to eq("(#{to_sql(relation_1)})\n#{operator_keyword}\n(#{to_sql(relation_2)})")
end
it 'skips Model.none segements' do
empty_relation = User.none
set_operator = described_class.new([empty_relation, relation_1, relation_2])
expect {User.where("users.id IN (#{set_operator.to_sql})").to_a}.not_to raise_error
expect(set_operator.to_sql).to eq("(#{to_sql(relation_1)})\n#{operator_keyword}\n(#{to_sql(relation_2)})")
end
it "uses #{operator_keyword} ALL when removing duplicates is disabled" do
set_operator = described_class
.new([relation_1, relation_2], remove_duplicates: false)
expect(set_operator.to_sql).to include("#{operator_keyword} ALL")
end
it 'returns `NULL` if all relations are empty' do
empty_relation = User.none
set_operator = described_class.new([empty_relation, empty_relation])
expect(set_operator.to_sql).to eq('NULL')
end
end
end
|