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CASSANALYTICS-195: Make QuickTheories tests reproducible from a single seed #240

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d355b06
CASSANALYTICS-195: Make QuickTheories tests reproducible from a singl…
yifan-c Sep 1, 2026
e58a0f6
Avoid drawing too much value from qt and oom
yifan-c Sep 2, 2026
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3 changes: 2 additions & 1 deletion ...-analytics-cdc-codec/src/test/java/org/apache/cassandra/cdc/json/JsonSerializerTests.java
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Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,7 @@
import java.nio.ByteBuffer;
import java.util.Base64;
import java.util.Iterator;
import java.util.Random;
import java.util.concurrent.TimeUnit;
import java.util.function.Function;

Expand Down Expand Up @@ -109,7 +110,7 @@ public void testJsonBinary() throws IOException
{
CdcEventBuilder eventBuilder = CdcEventBuilder.of(CdcEvent.Kind.INSERT, TEST_KS, TEST_TBL_BINARY);
eventBuilder.setPartitionKeys(listOf(Value.of(TEST_KS, "a", "int", TYPES.aInt().serialize(1))));
ByteBuffer randomBytes = ByteBuffer.wrap(RandomUtils.randomBytes(128));
ByteBuffer randomBytes = ByteBuffer.wrap(RandomUtils.randomBytes(new Random(), 128));
eventBuilder.setValueColumns(listOf(
Value.of(TEST_KS, "b", "blob", TYPES.blob().serialize(randomBytes)),
Value.of(TEST_KS, "c", "inet", TYPES.inet().serialize(InetAddress.getByName("127.0.0.1")))
Expand Down
5 changes: 4 additions & 1 deletion ...a-analytics-cdc/src/test/java/org/apache/cassandra/cdc/AvroByteRecordTransformerTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,7 @@

import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.Random;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicReference;
import java.util.function.Function;
Expand Down Expand Up @@ -107,14 +108,16 @@ public void testTtlDeletedAtByteAvroEncoding(CassandraVersion version)
.withColumn("c2", bridge.text());

AtomicReference<CqlTable> tableRef = new AtomicReference<>();
Random random = new Random();
testWith(bridge, cdcBridge, commitLogDir, schemaBuilder)
.withNumRows(NUM_ROWS)
.withRandom(random)
.clearWriters()
.withWriter((tester, rows, writer) -> {
tableRef.set(tester.cqlTable);
for (int i = 0; i < tester.numRows; i++)
{
TestSchema.TestRow testRow = CdcTester.newUniqueRow(tester.schema, rows);
TestSchema.TestRow testRow = CdcTester.newUniqueRow(tester.schema, rows, random);
testRow.setTTL(ttlSeconds);
writer.accept(testRow, TimeUnit.MILLISECONDS.toMicros(System.currentTimeMillis()));
}
Expand Down
29 changes: 22 additions & 7 deletions ...nalytics-cdc/src/test/java/org/apache/cassandra/cdc/AvroGenericRecordTransformerTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,7 @@
package org.apache.cassandra.cdc;

import java.util.List;
import java.util.Random;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicReference;
import java.util.function.Function;
Expand Down Expand Up @@ -99,14 +100,16 @@ public void testBasicInsertAvroEncoding(CassandraVersion version)

// Capture CqlTable from the tester via the writer callback
AtomicReference<CqlTable> tableRef = new AtomicReference<>();
Random random = new Random();
testWith(bridge, cdcBridge, commitLogDir, schemaBuilder)
.withNumRows(NUM_ROWS)
.withRandom(random)
.clearWriters()
.withWriter((tester, rows, writer) -> {
tableRef.set(tester.cqlTable);
long timestampMicros = TimeUnit.MILLISECONDS.toMicros(System.currentTimeMillis());
IntStream.range(0, tester.numRows)
.forEach(i -> writer.accept(CdcTester.newUniqueRow(tester.schema, rows), timestampMicros));
.forEach(i -> writer.accept(CdcTester.newUniqueRow(tester.schema, rows, random), timestampMicros));
})
.withCdcEventChecker((testRows, events) -> {
assertThat(events).hasSize(NUM_ROWS);
Expand Down Expand Up @@ -158,14 +161,16 @@ public void testCollectionTypesAvroEncoding(CassandraVersion version)
.withColumn("l", bridge.list(bridge.text()));

AtomicReference<CqlTable> tableRef = new AtomicReference<>();
Random random = new Random();
testWith(bridge, cdcBridge, commitLogDir, schemaBuilder)
.withNumRows(NUM_ROWS)
.withRandom(random)
.clearWriters()
.withWriter((tester, rows, writer) -> {
tableRef.set(tester.cqlTable);
long timestampMicros = TimeUnit.MILLISECONDS.toMicros(System.currentTimeMillis());
IntStream.range(0, tester.numRows)
.forEach(i -> writer.accept(CdcTester.newUniqueRow(tester.schema, rows), timestampMicros));
.forEach(i -> writer.accept(CdcTester.newUniqueRow(tester.schema, rows, random), timestampMicros));
})
.withCdcEventChecker((testRows, events) -> {
assertThat(events).hasSize(NUM_ROWS);
Expand Down Expand Up @@ -199,14 +204,16 @@ public void testAvroSerializeDeserializeRoundTrip(CassandraVersion version)
.withColumn("c2", bridge.text());

AtomicReference<CqlTable> tableRef = new AtomicReference<>();
Random random = new Random();
testWith(bridge, cdcBridge, commitLogDir, schemaBuilder)
.withNumRows(NUM_ROWS)
.withRandom(random)
.clearWriters()
.withWriter((tester, rows, writer) -> {
tableRef.set(tester.cqlTable);
long timestampMicros = TimeUnit.MILLISECONDS.toMicros(System.currentTimeMillis());
IntStream.range(0, tester.numRows)
.forEach(i -> writer.accept(CdcTester.newUniqueRow(tester.schema, rows), timestampMicros));
.forEach(i -> writer.accept(CdcTester.newUniqueRow(tester.schema, rows, random), timestampMicros));
})
.withCdcEventChecker((testRows, events) -> {
assertThat(events).hasSize(NUM_ROWS);
Expand Down Expand Up @@ -263,14 +270,16 @@ public void testDeleteEventAvroEncoding(CassandraVersion version)
.withColumn("c2", bridge.text());

AtomicReference<CqlTable> tableRef = new AtomicReference<>();
Random random = new Random();
testWith(bridge, cdcBridge, commitLogDir, schemaBuilder)
.withNumRows(NUM_ROWS)
.withRandom(random)
.clearWriters()
.withWriter((tester, rows, writer) -> {
tableRef.set(tester.cqlTable);
for (int i = 0; i < tester.numRows; i++)
{
TestSchema.TestRow testRow = CdcTester.newUniqueRow(tester.schema, rows);
TestSchema.TestRow testRow = CdcTester.newUniqueRow(tester.schema, rows, random);
testRow = testRow.copy("c1", org.apache.cassandra.bridge.CdcBridge.UNSET_MARKER);
testRow = testRow.copy("c2", null);
writer.accept(testRow, TimeUnit.MILLISECONDS.toMicros(System.currentTimeMillis()));
Expand Down Expand Up @@ -318,14 +327,16 @@ public void testMaxSupportedTtlAvroEncoding(CassandraVersion version)
.withColumn("c1", bridge.aInt());

AtomicReference<CqlTable> tableRef = new AtomicReference<>();
Random random = new Random();
testWith(bridge, cdcBridge, commitLogDir, schemaBuilder)
.withNumRows(NUM_ROWS)
.withRandom(random)
.clearWriters()
.withWriter((tester, rows, writer) -> {
tableRef.set(tester.cqlTable);
for (int i = 0; i < tester.numRows; i++)
{
TestSchema.TestRow testRow = CdcTester.newUniqueRow(tester.schema, rows);
TestSchema.TestRow testRow = CdcTester.newUniqueRow(tester.schema, rows, random);
testRow.setTTL(largeTtl);
writer.accept(testRow, TimeUnit.MILLISECONDS.toMicros(System.currentTimeMillis()));
}
Expand Down Expand Up @@ -387,14 +398,16 @@ public void testPartitionDeleteAvroEncoding(CassandraVersion version)
.withColumn("c1", bridge.aInt());

AtomicReference<CqlTable> tableRef = new AtomicReference<>();
Random random = new Random();
testWith(bridge, cdcBridge, commitLogDir, schemaBuilder)
.withNumRows(NUM_ROWS)
.withRandom(random)
.clearWriters()
.withWriter((tester, rows, writer) -> {
tableRef.set(tester.cqlTable);
for (int i = 0; i < tester.numRows; i++)
{
TestSchema.TestRow testRow = newUniquePartitionDeletion(tester.schema, rows);
TestSchema.TestRow testRow = newUniquePartitionDeletion(tester.schema, rows, random);
writer.accept(testRow, TimeUnit.MILLISECONDS.toMicros(System.currentTimeMillis()));
}
})
Expand Down Expand Up @@ -438,14 +451,16 @@ public void testMixedTtlAndNonTtlAvroEncoding(CassandraVersion version)
.withColumn("c1", bridge.aInt());

AtomicReference<CqlTable> tableRef = new AtomicReference<>();
Random random = new Random();
testWith(bridge, cdcBridge, commitLogDir, schemaBuilder)
.withNumRows(NUM_ROWS)
.withRandom(random)
.clearWriters()
.withWriter((tester, rows, writer) -> {
tableRef.set(tester.cqlTable);
for (int i = 0; i < tester.numRows; i++)
{
TestSchema.TestRow testRow = CdcTester.newUniqueRow(tester.schema, rows);
TestSchema.TestRow testRow = CdcTester.newUniqueRow(tester.schema, rows, random);
if (i % 2 == 0)
{
testRow.setTTL(ttlSeconds);
Expand Down
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