blob: 8b80b770e518ffc5012008b8900729cbdae9353d (
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
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
|
;; Copyright (c) Jeffrey Straszheim. All rights reserved. The use and
;; distribution terms for this software are covered by the Eclipse Public
;; License 1.0 (http://opensource.org/licenses/eclipse-1.0.php) which can
;; be found in the file epl-v10.html at the root of this distribution. By
;; using this software in any fashion, you are agreeing to be bound by the
;; terms of this license. You must not remove this notice, or any other,
;; from this software.
;;
;; test-rules.clj
;;
;; A Clojure implementation of Datalog -- Rule Tests
;;
;; straszheimjeffrey (gmail)
;; Created 12 Feburary 2009
(ns clojure.contrib.datalog.tests.test-rules
(:use clojure.test
clojure.contrib.datalog.rules
clojure.contrib.datalog.literals
clojure.contrib.datalog.database))
(def tr-1 (<- (:fred :x ?x :y ?y) (:mary :x ?x :z ?z) (:sally :z ?z :y ?y)))
(def tr-2 (<- (:fred) (not! :mary :x 3)))
(def tr-3 (<- (:fred :x ?x :y ?y) (if > ?x ?y) (:mary :x ?x) (:sally :y ?y)))
(deftest test-rule-safety
(is (thrown-with-msg? Exception #".*Head vars.*not bound.*"
(<- (:fred :x ?x) (:sally :y ?y))))
(is (thrown-with-msg? Exception #".*Body vars.*not bound.*negative position.*"
(<- (:fred :x ?x) (:becky :x ?x) (not! :sally :y ?y))))
(is (thrown-with-msg? Exception #".*Body vars.*not bound.*negative position.*"
(<- (:fred :x ?x) (:becky :x ?x) (if > ?x ?y)))))
(deftest test-sip
(is (= (compute-sip #{:x} #{:mary :sally} tr-1)
(<- ({:pred :fred :bound #{:x}} :x ?x :y ?y)
({:pred :mary :bound #{:x}} :z ?z :x ?x)
({:pred :sally :bound #{:z}} :y ?y :z ?z))))
(is (= (compute-sip #{} #{:mary :sally} tr-1)
(<- (:fred :y ?y :x ?x) (:mary :z ?z :x ?x) ({:pred :sally :bound #{:z}} :y ?y :z ?z))))
(is (= (compute-sip #{} #{:mary} tr-2)
(<- (:fred) (not! {:pred :mary :bound #{:x}} :x 3))))
(is (= (compute-sip #{} #{} tr-2)
tr-2))
(is (= (display-rule (compute-sip #{:x} #{:mary :sally} tr-3))
(display-rule (<- ({:pred :fred :bound #{:x}} :x ?x :y ?y)
({:pred :mary :bound #{:x}} :x ?x)
(:sally :y ?y)
(if > ?x ?y))))))
; Display rule is used because = does not work on
; (if > ?x ?y) because it contains a closure
(def rs
(rules-set
(<- (:path :a ?x :b ?y) (:edge :a ?x :b ?y))
(<- (:path :a ?x :b ?y) (:edge :a ?x :b ?z) (:path :a ?z :b ?y))
(<- (:edge :a ?x :b ?y) (:route :a ?x :b ?y) (if not= ?x ?y))))
(deftest test-rules-set
(is (= (count rs) 3))
(is (contains? rs (<- (:path :a ?x :b ?y) (:edge :a ?x :b ?z) (:path :a ?z :b ?y)))))
(deftest test-predicate-map
(let [pm (predicate-map rs)]
(is (= (pm :path)
#{(<- (:path :a ?x :b ?y) (:edge :a ?x :b ?y))
(<- (:path :a ?x :b ?y) (:edge :a ?x :b ?z) (:path :a ?z :b ?y))}))
(is (= (-> :edge pm count) 1))))
(def db1 (make-database
(relation :fred [:x :y])
(index :fred :x)
(relation :sally [:x])
(relation :ben [:y])))
(def db2 (add-tuples db1
[:fred :x 1 :y :mary]
[:fred :x 1 :y :becky]
[:fred :x 3 :y :sally]
[:fred :x 4 :y :joe]
[:fred :x 4 :y :bob]
[:sally :x 1]
[:sally :x 2]
[:sally :x 3]
[:sally :x 4]
[:ben :y :bob]))
(deftest test-apply-rule
(is (= (apply-rule db2 empty-database (<- (:becky :y ?y) (:sally :x ?x)
(:fred :x ?x :y ?y)
(not! :ben :y ?y)
(if not= ?x 3)))
(datalog-database
{
:becky
(datalog-relation
;; Schema
#{:y}
;; Data
#{
{:y :joe}
{:y :mary}
{:y :becky}
}
;; Indexes
{
})
}))))
(comment
(run-tests)
)
;; End of file
|
