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
176
177
178
|
module GenomeTest (suite) where
import Test.Tasty
import Test.Tasty.HUnit
import Mind (NeuronIndex (..))
import Genome
import System.Random
import Data.Ix
suite :: TestTree
suite = testGroup "genome tests" $
[ mutationTests
]
mutationTests :: TestTree
mutationTests = testGroup "mutations" $
[ testCase "mutating the source of a gene" $
let
rand = mkStdGen 1 -- randomR generates sequence (1, 2, 0, ...)
genome = Genome { numInput = 2, numInternal = 1, numOutput = 5, genes = [] }
sourceGene = Gene { source = Input 0, sink = Output 1, weight = 4 }
mutatedGenes = fst $ foldl
(\(list, r) g ->
let (g', r') = mutateGeneSource genome g r
in (list ++ [g'], r')
)
([], rand)
(replicate 3 sourceGene)
in
mutatedGenes @?=
[ Gene { source = Input 1, sink = Output 1, weight = 4 }
, Gene { source = Internal 0, sink = Output 1, weight = 4 }
, Gene { source = Input 0, sink = Output 1, weight = 4 }
]
, testCase "mutating the sink of a gene" $
let
rand = mkStdGen 1 -- randomR generates sequence (1, 2, 0, ...)
genome = Genome { numInput = 2, numInternal = 1, numOutput = 2, genes = [] }
sourceGene = Gene { source = Input 0, sink = Output 1, weight = 4 }
mutatedGenes = fst $ foldl
(\(list, r) g ->
let (g', r') = mutateGeneSink genome g r
in (list ++ [g'], r')
)
([], rand)
(replicate 3 sourceGene)
in
mutatedGenes @?=
[ Gene { source = Input 0, sink = Output 0, weight = 4 }
, Gene { source = Input 0, sink = Output 1, weight = 4 }
, Gene { source = Input 0, sink = Internal 0, weight = 4 }
]
, testCase "mutating the weight of a gene" $
let
rand = mkStdGen 0 -- randomR generates sequence (7.572357,-1.4116564,-7.2413177, ...)
genome = Genome { numInput = 2, numInternal = 1, numOutput = 2, genes = [] }
sourceGene = Gene { source = Input 0, sink = Output 1, weight = 4 }
mutatedGenes = fst $ foldl
(\(list, r) g ->
let (g', r') = mutateGeneWeight genome g r
in (list ++ [g'], r')
)
([], rand)
(replicate 3 sourceGene)
expected =
[ Gene { source = Input 0, sink = Output 1, weight = 7.572357}
, Gene { source = Input 0, sink = Output 1, weight = -1.4116564 }
, Gene { source = Input 0, sink = Output 1, weight = -7.2413177 }
]
approxEqual a b = abs (a-b) < 0.0001
in do
(map source mutatedGenes) @?= (map source expected)
(map sink mutatedGenes) @?= (map sink expected)
True @?= foldl (&&) True (zipWith approxEqual
(map weight mutatedGenes)
(map weight expected)
)
, testCase "insert new internal neuron" $
let
genome = Genome
{ numInput = 1
, numInternal = 2
, numOutput = 1
, genes =
[ Gene { source = Input 0, sink = Internal 0, weight = 1.0 }
, Gene { source = Internal 0, sink = Internal 1, weight = 1.0 }
, Gene { source = Internal 1, sink = Output 0, weight = 1.0 }
]
}
r = mkStdGen 5
(genome', r') = mutateGenomeAddInternal genome r
in do
r' @?= r
(numInput genome') @?= (numInput genome)
(numInternal genome') @?= (1 + numInternal genome)
(numOutput genome') @?= (numOutput genome)
(genes genome') @?= (genes genome)
, testCase "remove internal neuron" $
let
r = mkStdGen 1 -- randomR (0, 2) produces (1, 2, 0, ...)
genome = Genome
{ numInput = 1
, numInternal = 3
, numOutput = 1
, genes =
[ Gene { source = Input 0, sink = Internal 0, weight = 1.0 }
, Gene { source = Internal 0, sink = Internal 1, weight = 1.0 }
, Gene { source = Internal 1, sink = Internal 2, weight = 1.0 }
, Gene { source = Internal 2, sink = Output 0, weight = 1.0 }
]
}
(genome', r') = mutateGenomeRemoveInternal genome r
(genome'', r'') = mutateGenomeRemoveInternal genome r'
(genome''', _) = mutateGenomeRemoveInternal genome r''
in do
(numInput genome') @?= (numInput genome)
(numInput genome'') @?= (numInput genome)
(numInput genome''') @?= (numInput genome)
(numInternal genome') @?= (numInternal genome - 1)
(numInternal genome'') @?= (numInternal genome - 1)
(numInternal genome''') @?= (numInternal genome - 1)
(numOutput genome') @?= (numOutput genome)
(numOutput genome'') @?= (numOutput genome)
(numOutput genome''') @?= (numOutput genome)
(genes genome') @?=
[ Gene { source = Input 0, sink = Internal 0, weight = 1.0 }
, Gene { source = Internal 0, sink = Internal 1, weight = 1.0 }
, Gene { source = Internal 0, sink = Internal 1, weight = 1.0 }
, Gene { source = Internal 1, sink = Output 0, weight = 1.0 }
]
(genes genome'') @?=
[ Gene { source = Input 0, sink = Internal 0, weight = 1.0 }
, Gene { source = Internal 0, sink = Internal 1, weight = 1.0 }
, Gene { source = Internal 1, sink = Output 0, weight = 1.0 }
, Gene { source = Internal 1, sink = Output 0, weight = 1.0 }
]
(genes genome''') @?=
[ Gene { source = Input 0, sink = Internal 0, weight = 1.0 }
, Gene { source = Input 0, sink = Internal 0, weight = 1.0 }
, Gene { source = Internal 0, sink = Internal 1, weight = 1.0 }
, Gene { source = Internal 1, sink = Output 0, weight = 1.0 }
]
, testCase "add new gene" $
let
genome = Genome
{ numInput = 1
, numInternal = 2
, numOutput = 1
, genes = []
}
r = mkStdGen 5
(genome', _) = mutateGenomeAddGene genome r
new = last $ genes genome'
-- checking sources
validSource (Input x) = inRange (0, numInput genome') x
validSource (Internal x) = inRange (0, numInternal genome') x
validSource (Output _) = False
-- checking sinks
validSink (Input _) = False
validSink (Internal x) = inRange(0, numInternal genome') x
validSink (Output x) = inRange(0, numOutput genome') x
w = weight new
in do
(numInput genome') @?= (numInput genome)
(numInternal genome') @?= (numInternal genome)
(numOutput genome') @?= (numOutput genome)
(length $ genes genome') @?= 1 + (length $ genes genome)
validSource (source new) @?= True
validSink (sink new) @?= True
(w >= -4) && (w <= 4) @?= True
]
|
