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Commit 3c05b85

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Optional seed configuration for (partially) deterministic test runs.
1 parent bd2a4d1 commit 3c05b85

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3 files changed

+44
-12
lines changed

3 files changed

+44
-12
lines changed

‎.gitignore‎

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Original file line numberDiff line numberDiff line change
@@ -3,3 +3,4 @@ target
33
nb-configuration.xml
44
.idea
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json/examples/*.json
6+
seeds/*.txt

‎seeds/dummy‎

Whitespace-only changes.

‎src/test/java/de/christofreichardt/asn1/ASN1Unit.java‎

Lines changed: 43 additions & 12 deletions
Original file line numberDiff line numberDiff line change
@@ -3,27 +3,42 @@
33
import de.christofreichardt.diagnosis.AbstractTracer;
44
import de.christofreichardt.diagnosis.Traceable;
55
import de.christofreichardt.diagnosis.TracerFactory;
6-
import java.util.Arrays;
7-
import java.util.HexFormat;
8-
import java.util.NoSuchElementException;
9-
import java.util.Random;
6+
import java.io.IOException;
7+
import java.nio.file.Files;
8+
import java.nio.file.Path;
9+
import java.security.SecureRandom;
10+
import java.util.*;
1011
import java.util.stream.Stream;
1112
import org.assertj.core.api.WithAssertions;
1213
import org.junit.jupiter.api.AfterAll;
1314
import org.junit.jupiter.api.BeforeAll;
15+
import org.junit.jupiter.api.Test;
1416
import org.junit.jupiter.api.TestInstance;
1517
import org.junit.jupiter.params.ParameterizedTest;
1618
import org.junit.jupiter.params.provider.MethodSource;
1719

1820
@TestInstance(TestInstance.Lifecycle.PER_CLASS)
1921
public class ASN1Unit implements Traceable, WithAssertions {
2022

23+
Random random = new SecureRandom();
24+
2125
@BeforeAll
22-
void init() {
26+
void init() throwsIOException{
2327
AbstractTracer tracer = getCurrentTracer();
2428
tracer.entry("void", this, "init()");
2529

2630
try {
31+
Path path = Path.of("seeds", "asn1-unit-seed.txt");
32+
long seed;
33+
if (Files.exists(path)) {
34+
tracer.out().printfIndentln("Using configured seed ...");
35+
List<String> lines = Files.readAllLines(path);
36+
seed = Long.parseLong(lines.get(0));
37+
} else {
38+
seed = this.random.nextLong();
39+
}
40+
tracer.out().printfIndentln("seed = %d", seed);
41+
this.random.setSeed(seed);
2742
} finally {
2843
tracer.wayout();
2944
}
@@ -109,7 +124,7 @@ public String toString() {
109124
}
110125
}
111126

112-
staticStream<ASN1SeqTestParam> asn1IntSequenceStream(int seqCount, int maxIntByteCount, int seqMaxByteCount, int maxSeqLength) {
127+
Stream<ASN1SeqTestParam> asn1IntSequenceStream(int seqCount, int maxIntByteCount, int seqMaxByteCount, int maxSeqLength) {
113128
AbstractTracer tracer = TracerFactory.getInstance().getCurrentPoolTracer();
114129
tracer.entry("Stream<ASN1IntSequence>", ASN1Unit.class, "asn1IntSequenceStream()");
115130

@@ -118,18 +133,17 @@ static Stream<ASN1SeqTestParam> asn1IntSequenceStream(int seqCount, int maxIntBy
118133
seqCount, maxIntByteCount, seqMaxByteCount, maxSeqLength);
119134

120135
ASN1SeqTestParam[] asn1SeqTestParams = new ASN1SeqTestParam[seqCount];
121-
Random random = new Random();
122136
int index = 0;
123137
do {
124-
int intCount = random.nextInt(maxSeqLength);
138+
int intCount = this.random.nextInt(maxSeqLength);
125139
tracer.out().printfIndentln("index = %d, intCount = %d", index, intCount);
126140
int sum = 0;
127141
ASN1Integer[] asn1Integers = new ASN1Integer[intCount];
128142
for (int j=0; j<intCount; j++) {
129-
int length = random.nextInt(maxIntByteCount);
143+
int length = this.random.nextInt(maxIntByteCount);
130144
tracer.out().printfIndentln("length = %d", length);
131145
byte[] bytes = new byte[length];
132-
random.nextBytes(bytes);
146+
this.random.nextBytes(bytes);
133147
ASN1Integer asn1Integer = ASN1Integer.fromBytes(bytes);
134148
tracer.out().printfIndentln("asn1Integer = %s", asn1Integer);
135149
sum += asn1Integer.asn1Length.rawLength();
@@ -153,7 +167,7 @@ static Stream<ASN1SeqTestParam> asn1IntSequenceStream(int seqCount, int maxIntBy
153167
}
154168
}
155169

156-
staticStream<ASN1SeqTestParam> asn1IntShortSequenceStream() {
170+
Stream<ASN1SeqTestParam> asn1IntShortSequenceStream() {
157171
return asn1IntSequenceStream(25, 32, ASN1.SHORT_LENGTH, 16);
158172
}
159173

@@ -243,7 +257,7 @@ void decodeSignaturesWithLongFormLength(ASN1_SignatureTestParam asn1_signatureTe
243257
}
244258
}
245259

246-
staticStream<ASN1SeqTestParam> asn1IntNotSoShortSequenceStream() {
260+
Stream<ASN1SeqTestParam> asn1IntNotSoShortSequenceStream() {
247261
return asn1IntSequenceStream(25, 64, 255, 8);
248262
}
249263

@@ -269,6 +283,23 @@ void randomNotSoShortSequencesWithShortInts(ASN1SeqTestParam asn1SeqTestParam) {
269283
}
270284
}
271285

286+
@Test
287+
void seeding() {
288+
AbstractTracer tracer = getCurrentTracer();
289+
tracer.entry("void", this, "seeding()");
290+
291+
try {
292+
StringBuilder stringBuilder = new StringBuilder();
293+
for (int i=0; i<25; i++) {
294+
stringBuilder.append(this.random.nextInt(100));
295+
stringBuilder.append(" ");
296+
}
297+
tracer.out().printfIndentln("random ints = %s", stringBuilder.toString());
298+
} finally {
299+
tracer.wayout();
300+
}
301+
}
302+
272303
@AfterAll
273304
void exit() {
274305
AbstractTracer tracer = getCurrentTracer();

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