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
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
require File.join(File.dirname(__FILE__), '..', '..', '..', 'spec_helper')
module ActiveRelation
describe Projection do
before do
@relation = Table.new(:users)
@attribute = @relation[:id]
end
describe '#attributes' do
before do
@projection = Projection.new(@relation, @attribute)
end
it "manufactures attributes associated with the projection relation" do
@projection.attributes.should == [@attribute].collect { |a| a.bind(@projection) }
end
end
describe '==' do
before do
@another_relation = Table.new(:photos)
@another_attribute = @relation[:name]
end
it "obtains if the relations and attributes are identical" do
Projection.new(@relation, @attribute).should == Projection.new(@relation, @attribute)
Projection.new(@relation, @attribute).should_not == Projection.new(@another_relation, @attribute)
Projection.new(@relation, @attribute).should_not == Projection.new(@relation, @another_attribute)
end
end
describe '#qualify' do
it "descends" do
Projection.new(@relation, @attribute).qualify. \
should == Projection.new(@relation, @attribute).descend(&:qualify)
end
end
describe '#descend' do
it "distributes a block over the relation and attributes" do
Projection.new(@relation, @attribute).descend(&:qualify). \
should == Projection.new(@relation.descend(&:qualify), @attribute.qualify)
end
end
describe '#to_sql' do
it "manufactures sql with a limited select clause" do
Projection.new(@relation, @attribute).to_sql.should be_like("
SELECT `users`.`id`
FROM `users`
")
end
it "manufactures sql with value selects" do
Projection.new(@relation, Projection.new(@relation, @relation[:name])).to_sql.should be_like("
SELECT (SELECT `users`.`name` FROM `users`) FROM `users`
")
end
end
end
end
|
