blob: c7744cecac516dd97a68f5a9beddb22c6e196569 (
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
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
/*
* Copyright 2023 Code Intelligence GmbH
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.code_intelligence.jazzer.mutation.support;
import static com.code_intelligence.jazzer.mutation.support.Preconditions.requireNonNullElements;
import static com.google.common.truth.Truth.assertThat;
import static java.util.Arrays.stream;
import static java.util.stream.Collectors.toCollection;
import com.code_intelligence.jazzer.mutation.api.Debuggable;
import com.code_intelligence.jazzer.mutation.api.PseudoRandom;
import com.code_intelligence.jazzer.mutation.api.SerializingMutator;
import com.code_intelligence.jazzer.mutation.engine.SeededPseudoRandom;
import com.google.errorprone.annotations.CheckReturnValue;
import com.google.errorprone.annotations.MustBeClosed;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.OutputStream;
import java.util.ArrayDeque;
import java.util.Queue;
import java.util.function.Function;
import java.util.function.Predicate;
public final class TestSupport {
private static final DataOutputStream nullDataOutputStream =
new DataOutputStream(new OutputStream() {
@Override
public void write(int i) {}
});
private TestSupport() {}
public static DataOutputStream nullDataOutputStream() {
return nullDataOutputStream;
}
/**
* Deterministically creates a new instance of {@link PseudoRandom} whose exact behavior is
* intentionally unspecified.
*/
// TODO: Turn usages of this function into fuzz tests.
public static PseudoRandom anyPseudoRandom() {
// Change this seed from time to time to shake out tests relying on hardcoded behavior.
return new SeededPseudoRandom(8853461259049838337L);
}
/**
* Creates a {@link PseudoRandom} whose methods return the given values in order.
*/
@MustBeClosed
public static MockPseudoRandom mockPseudoRandom(Object... returnValues) {
return new MockPseudoRandom(returnValues);
}
@CheckReturnValue
public static <T> SerializingMutator<T> mockMutator(T initialValue, Function<T, T> mutate) {
return new SerializingMutator<T>() {
@Override
public T read(DataInputStream in) {
return initialValue;
}
@Override
public void write(T value, DataOutputStream out) {
throw new UnsupportedOperationException("mockMutator does not support write");
}
@Override
public T init(PseudoRandom prng) {
return initialValue;
}
@Override
public T mutate(T value, PseudoRandom prng) {
return mutate.apply(value);
}
@Override
public String toDebugString(Predicate<Debuggable> isInCycle) {
if (initialValue == null) {
return "null";
}
return initialValue.getClass().getSimpleName();
}
@Override
public T detach(T value) {
return value;
}
};
}
public static final class MockPseudoRandom implements PseudoRandom, AutoCloseable {
private final Queue<Object> elements;
private MockPseudoRandom(Object... objects) {
requireNonNullElements(objects);
this.elements = stream(objects).collect(toCollection(ArrayDeque::new));
}
@Override
public boolean nextBoolean() {
assertThat(elements).isNotEmpty();
return (boolean) elements.poll();
}
@Override
public int nextInt() {
assertThat(elements).isNotEmpty();
return (int) elements.poll();
}
@Override
public int nextInt(int upperExclusive) {
assertThat(elements).isNotEmpty();
return (int) elements.poll();
}
@Override
public int nextInt(int lowerInclusive, int upperExclusive) {
assertThat(elements).isNotEmpty();
return (int) elements.poll();
}
@Override
public void close() {
assertThat(elements).isEmpty();
}
}
}
|
