clolov commented on code in PR #14330:
URL: https://github.com/apache/kafka/pull/14330#discussion_r1317285371


##########
storage/src/test/java/org/apache/kafka/tiered/storage/integration/DeleteSegmentsDueToLogStartOffsetBreachTest.java:
##########
@@ -0,0 +1,91 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 org.apache.kafka.tiered.storage.integration;
+
+import org.apache.kafka.tiered.storage.TieredStorageTestBuilder;
+import org.apache.kafka.tiered.storage.TieredStorageTestHarness;
+import org.apache.kafka.tiered.storage.specs.KeyValueSpec;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+
+import static 
org.apache.kafka.server.log.remote.storage.LocalTieredStorageEvent.EventType.DELETE_SEGMENT;
+import static org.apache.kafka.common.utils.Utils.mkEntry;
+import static org.apache.kafka.common.utils.Utils.mkMap;
+
+public final class DeleteSegmentsDueToLogStartOffsetBreachTest extends 
TieredStorageTestHarness {
+
+    @Override
+    public int brokerCount() {
+        return 2;
+    }
+
+    @Override
+    protected void writeTestSpecifications(TieredStorageTestBuilder builder) {
+        final Integer broker0 = 0;
+        final Integer broker1 = 1;
+        final String topicA = "topicA";
+        final Integer p0 = 0;
+        final Integer partitionCount = 1;
+        final Integer replicationFactor = 2;
+        final Integer maxBatchCountPerSegment = 2;
+        final Map<Integer, List<Integer>> replicaAssignment = 
mkMap(mkEntry(p0, Arrays.asList(broker0, broker1)));
+        final boolean enableRemoteLogStorage = true;
+        final int beginEpoch = 0;
+        final long startOffset = 3;
+        final long beforeOffset = 3L;
+
+        // Create topicA with 1 partition and 2 RF
+        builder.createTopic(topicA, partitionCount, replicationFactor, 
maxBatchCountPerSegment, replicaAssignment,
+                        enableRemoteLogStorage)
+                // produce events to partition 0 and expect 2 segments to be 
offloaded
+                .expectSegmentToBeOffloaded(broker0, topicA, p0, 0, new 
KeyValueSpec("k0", "v0"),
+                        new KeyValueSpec("k1", "v1"))
+                .expectSegmentToBeOffloaded(broker0, topicA, p0, 2, new 
KeyValueSpec("k2", "v2"),
+                        new KeyValueSpec("k3", "v3"))
+                .expectEarliestLocalOffsetInLogDirectory(topicA, p0, 4L)
+                .produce(topicA, p0, new KeyValueSpec("k0", "v0"), new 
KeyValueSpec("k1", "v1"),
+                        new KeyValueSpec("k2", "v2"), new KeyValueSpec("k3", 
"v3"), new KeyValueSpec("k4", "v4"))
+                // Use DELETE_RECORDS API to delete the records upto offset 3 
and expect one remote segment to be deleted
+                .expectDeletionInRemoteStorage(broker0, topicA, p0, 
DELETE_SEGMENT, 1)
+                .deleteRecords(topicA, p0, beforeOffset)
+                // expect that the leader epoch checkpoint is updated
+                // Comment out this line if it's FLAKY since the leader-epoch 
is not deterministic in ZK mode.
+                .expectLeaderEpochCheckpoint(broker0, topicA, p0, beginEpoch, 
startOffset)
+                // consume from the offset-3 of the topic to read data from 
local and remote storage
+                .expectFetchFromTieredStorage(broker0, topicA, p0, 1)
+                .consume(topicA, p0, 3L, 2, 1)
+
+                // switch leader to change the leader-epoch from 0 to 1
+                .expectLeader(topicA, p0, broker1, true)
+                // produce some more messages and move the log-start-offset 
such that earliest-epoch changes from 0 to 1
+                .expectSegmentToBeOffloaded(broker1, topicA, p0, 4, new 
KeyValueSpec("k4", "v4"),
+                        new KeyValueSpec("k5", "v5"))
+                .expectSegmentToBeOffloaded(broker1, topicA, p0, 6, new 
KeyValueSpec("k6", "v6"),
+                        new KeyValueSpec("k7", "v7"))
+                .expectEarliestLocalOffsetInLogDirectory(topicA, p0, 8L)
+                .produce(topicA, p0, new KeyValueSpec("k5", "v5"), new 
KeyValueSpec("k6", "v6"),
+                        new KeyValueSpec("k7", "v7"), new KeyValueSpec("k8", 
"v8"), new KeyValueSpec("k9", "v9"))
+                // Use DELETE_RECORDS API to delete the records upto offset 7 
and expect 2 remote segments to be deleted
+                .expectDeletionInRemoteStorage(broker1, topicA, p0, 
DELETE_SEGMENT, 2)
+                .deleteRecords(topicA, p0, 7L)

Review Comment:
   Nit: This is a not a variable, but the previous deletion was carried out 
using a variable - `beforeOffset`



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