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
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
require 'spec_helper'
module Arel
describe Attribute do
before do
@relation = Table.new(:users)
@attribute = @relation[:id]
end
describe 'Attribute::Transformations' do
describe '#as' do
it "manufactures an aliased attributed" do
@attribute.as(:alias).should == Attribute.new(@relation, @attribute.name, :alias => :alias, :ancestor => @attribute)
end
end
describe '#bind' do
it "manufactures an attribute with the relation bound and self as an ancestor" do
derived_relation = @relation.where(@relation[:id].eq(1))
@attribute.bind(derived_relation).should == Attribute.new(derived_relation, @attribute.name, :ancestor => @attribute)
end
it "returns self if the substituting to the same relation" do
@attribute.bind(@relation).should == @attribute
end
end
describe '#to_attribute' do
describe 'when the given relation is the same as the attributes relation' do
it "returns self" do
@attribute.to_attribute(@relation).should == @attribute
end
end
describe 'when the given relation differs from the attributes relation' do
it 'binds to the new relation' do
@attribute.to_attribute(new_relation = @relation.alias).should == @attribute.bind(new_relation)
end
end
end
end
describe '#column' do
it "returns the corresponding column in the relation" do
@attribute.column.should == @relation.column_for(@attribute)
end
end
describe '#engine' do
it "delegates to its relation" do
Attribute.new(@relation, :id).engine.should == @relation.engine
end
end
describe 'Attribute::Congruence' do
describe '/' do
before do
@aliased_relation = @relation.alias
@doubly_aliased_relation = @aliased_relation.alias
end
describe 'when dividing two unrelated attributes' do
it "returns 0.0" do
(@relation[:id] / @relation[:name]).should == 0.0
end
end
describe 'when dividing two matching attributes' do
it 'returns a the highest score for the most similar attributes' do
check((@aliased_relation[:id] / @relation[:id]).should == (@aliased_relation[:id] / @relation[:id]))
(@aliased_relation[:id] / @relation[:id]).should < (@aliased_relation[:id] / @aliased_relation[:id])
end
end
end
end
describe 'Attribute::Predications' do
before do
@attribute = Attribute.new(@relation, :name)
end
describe '#eq' do
it "manufactures an equality predicate" do
@attribute.eq('name').should == Predicates::Equality.new(@attribute, 'name')
end
end
describe '#lt' do
it "manufactures a less-than predicate" do
@attribute.lt(10).should == Predicates::LessThan.new(@attribute, 10)
end
end
describe '#lteq' do
it "manufactures a less-than or equal-to predicate" do
@attribute.lteq(10).should == Predicates::LessThanOrEqualTo.new(@attribute, 10)
end
end
describe '#gt' do
it "manufactures a greater-than predicate" do
@attribute.gt(10).should == Predicates::GreaterThan.new(@attribute, 10)
end
end
describe '#gteq' do
it "manufactures a greater-than or equal-to predicate" do
@attribute.gteq(10).should == Predicates::GreaterThanOrEqualTo.new(@attribute, 10)
end
end
describe '#matches' do
it "manufactures a match predicate" do
@attribute.matches(/.*/).should == Predicates::Match.new(@attribute, /.*/)
end
end
describe '#in' do
it "manufactures an in predicate" do
@attribute.in(1..30).should == Predicates::In.new(@attribute, (1..30))
end
end
end
describe Attribute::Expressions do
before do
@attribute = Attribute.new(@relation, :name)
end
describe '#count' do
it "manufactures a count Expression" do
@attribute.count.should == Count.new(@attribute)
end
end
describe '#sum' do
it "manufactures a sum Expression" do
@attribute.sum.should == Sum.new(@attribute)
end
end
describe '#maximum' do
it "manufactures a maximum Expression" do
@attribute.maximum.should == Maximum.new(@attribute)
end
end
describe '#minimum' do
it "manufactures a minimum Expression" do
@attribute.minimum.should == Minimum.new(@attribute)
end
end
describe '#average' do
it "manufactures an average Expression" do
@attribute.average.should == Average.new(@attribute)
end
end
end
describe Attribute::Orderings do
describe '#asc' do
it 'manufactures an ascending ordering' do
@attribute.asc.should == Ascending.new(@attribute)
end
end
describe '#desc' do
it 'manufactures a descending ordering' do
@attribute.desc.should == Descending.new(@attribute)
end
end
end
end
end
|
