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
|
package jcgp.backend.tests;
import static org.junit.Assert.assertTrue;
import jcgp.backend.function.Function;
import jcgp.backend.population.Chromosome;
import jcgp.backend.population.Connection;
import jcgp.backend.population.Node;
import jcgp.backend.resources.ModifiableResources;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
/**
*
* Tests which cover the behaviour specified for a node.
*
* - A node should contain read-only row and column values which are set upon construction.
* - It should contain a fully accessible Function object.
* - It should contain a set of connections which can be initialised and randomly
* modified. It should be able to return an addressed connection.
* - It should be able to compute a value using its function with its connections as arguments.
*
* WARNING: changing parameters may cause the tests to incorrectly fail!
*
* @author Eduardo Pedroni
*
*/
public class NodeTests {
private Node node;
private static Chromosome chromosome;
private static ModifiableResources resources;
// these numbers will be used by the node under test
private final int arg1 = 2;
private final int arg2 = 5;
@BeforeClass
public static void setUpBeforeClass() {
resources = new ModifiableResources();
resources.setFunctionSet(new TestFunctionSet());
chromosome = new Chromosome(resources);
}
@Before
public void setUp() throws Exception {
node = new Node(chromosome, 0, 0);
// make node with addition function and hard-coded value connections
node.initialise(resources.getFunction(0),
new Connection[]{new Connection() {
@Override
public Object getValue() {
// hardcode a value
return arg1;
}
},
new Connection() {
@Override
public Object getValue() {
// hardcode a value
return arg2;
}
}});
}
@Test
public void rowAndColumnTest() {
assertTrue("Incorrect row.", node.getRow() == 0);
assertTrue("Incorrect column.", node.getColumn() == 0);
}
@Test
public void functionTest() {
// make a new function and assign to node
Function f = new Function() {
@Override
public Object run(Object... connections) {
// blank
return 0;
}
@Override
public int getArity() {
// blank
return 0;
}
};
node.setFunction(f);
// check that the function returned by the node is f
assertTrue("Incorrect function returned.", node.getFunction() == f);
// check that it outputs 0 as it should
assertTrue("Incorrect function output.", ((Integer) node.getValue()) == 0);
}
@Test
public void evaluationTest() {
// check that addition is working
assertTrue("Node did not return expected value (sum of arguments). Output was: " + ((int) node.getValue()),
((int) node.getValue()) == arg1 + arg2);
// put in a different function, check the output has changed appropriately
node.setFunction(resources.getFunction(1));
assertTrue("Node did not return expected value (difference of arguments).", ((Integer) node.getValue()) == arg1 - arg2);
}
@Test
public void connectionsTest() {
// make new blank connections, check that they are returned correctly when addressed
Connection conn0, conn1, conn2;
conn0 = new Connection() {
@Override
public Object getValue() {
// blank
return 0;
}
};
conn1 = new Connection() {
@Override
public Object getValue() {
// blank
return 0;
}
};
Function function = new Function() {
@Override
public Object run(Object... connections) {
// blank
return null;
}
@Override
public int getArity() {
return 2;
}
};
node.initialise(function, conn0, conn1);
assertTrue("Connection 0 is incorrect.", node.getConnection(0) == conn0);
assertTrue("Connection 1 is incorrect.", node.getConnection(1) == conn1);
// make yet another connection, set it randomly, check that it is one of the node's connections
conn2 = new Connection() {
@Override
public Object getValue() {
// blank
return 0;
}
};
node.setConnection(resources.getRandomInt(resources.arity()), conn2);
assertTrue("Connection was not found in node.", node.getConnection(0) == conn2 || node.getConnection(1) == conn2);
}
}
|
