chia7712 commented on code in PR #22247:
URL: https://github.com/apache/kafka/pull/22247#discussion_r3215258117


##########
metadata/src/testFixtures/java/org/apache/kafka/image/MetadataImageTestFixtures.java:
##########
@@ -0,0 +1,67 @@
+/*
+ * 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.image;
+
+import org.apache.kafka.metadata.RecordTestUtils;
+
+public final class MetadataImageTestFixtures {

Review Comment:
   this name `MetadataCacheTestFixtures` is a sort of verbose. how about 
"MetadataCacheFixtures"?



##########
metadata/src/testFixtures/java/org/apache/kafka/metadata/authorizer/StandardAclTestFixtures.java:
##########
@@ -0,0 +1,79 @@
+/*
+ * 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.metadata.authorizer;
+
+import org.apache.kafka.common.acl.AclOperation;
+import org.apache.kafka.common.acl.AclPermissionType;
+import org.apache.kafka.common.resource.PatternType;
+import org.apache.kafka.common.resource.Resource;
+import org.apache.kafka.common.resource.ResourceType;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import static 
org.apache.kafka.metadata.authorizer.StandardAuthorizerData.WILDCARD;
+import static 
org.apache.kafka.metadata.authorizer.StandardAuthorizerData.WILDCARD_PRINCIPAL;
+
+public final class StandardAclTestFixtures {
+    public static final List<StandardAcl> TEST_ACLS = new ArrayList<>();

Review Comment:
   ```java
   public static final List<StandardAcl> TEST_ACLS = List.of(
       new StandardAcl(
           ResourceType.CLUSTER,
           Resource.CLUSTER_NAME,
           PatternType.LITERAL,
           WILDCARD_PRINCIPAL,
           WILDCARD,
           AclOperation.ALTER,
           AclPermissionType.ALLOW
       ),
       new StandardAcl(
           ResourceType.TOPIC,
           "foo_",
           PatternType.PREFIXED,
           WILDCARD_PRINCIPAL,
           WILDCARD,
           AclOperation.READ,
           AclPermissionType.ALLOW
       ),
       new StandardAcl(
           ResourceType.GROUP,
           "mygroup",
           PatternType.LITERAL,
           "User:foo",
           WILDCARD,
           AclOperation.READ,
           AclPermissionType.DENY
       ),
       new StandardAcl(
           ResourceType.GROUP,
           "mygroup",
           PatternType.PREFIXED,
           "User:foo",
           WILDCARD,
           AclOperation.READ,
           AclPermissionType.DENY
       ),
       new StandardAcl(
           ResourceType.GROUP,
           "foo",
           PatternType.PREFIXED,
           "User:foo",
           WILDCARD,
           AclOperation.READ,
           AclPermissionType.DENY
       )
   );
   ```



##########
metadata/src/testFixtures/java/org/apache/kafka/image/FeaturesImageTestFixtures.java:
##########
@@ -0,0 +1,88 @@
+/*
+ * 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.image;
+
+import org.apache.kafka.common.metadata.FeatureLevelRecord;
+import org.apache.kafka.metadata.RecordTestUtils;
+import org.apache.kafka.server.common.ApiMessageAndVersion;
+import org.apache.kafka.server.common.MetadataVersion;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public final class FeaturesImageTestFixtures {

Review Comment:
   ```java
   public final class FeaturesImageTestFixtures {
   
       public static final FeaturesImage IMAGE1 = new FeaturesImage(
               Map.of("foo", (short) 2, "bar", (short) 1),
               MetadataVersion.latestTesting()
       );
   
       public static final List<ApiMessageAndVersion> DELTA1_RECORDS = List.of(
               new ApiMessageAndVersion(new 
FeatureLevelRecord().setName("foo").setFeatureLevel((short) 3), (short) 0),
               new ApiMessageAndVersion(new 
FeatureLevelRecord().setName("bar").setFeatureLevel((short) 0), (short) 0),
               new ApiMessageAndVersion(new 
FeatureLevelRecord().setName("baz").setFeatureLevel((short) 8), (short) 0)
       );
   
       public static final FeaturesDelta DELTA1 = RecordTestUtils.replayAll(
               new FeaturesDelta(IMAGE1),
               DELTA1_RECORDS
       );
   
       public static final FeaturesImage IMAGE2 = new FeaturesImage(
               Map.of("foo", (short) 3, "baz", (short) 8),
               MetadataVersion.latestTesting()
       );
   
       public static final List<ApiMessageAndVersion> DELTA2_RECORDS = List.of(
               new ApiMessageAndVersion(new 
FeatureLevelRecord().setName("foo").setFeatureLevel((short) 0), (short) 0),
               new ApiMessageAndVersion(new 
FeatureLevelRecord().setName("baz").setFeatureLevel((short) 0), (short) 0),
               new ApiMessageAndVersion(new 
FeatureLevelRecord().setName("bar").setFeatureLevel((short) 1), (short) 0)
       );
   
       public static final FeaturesDelta DELTA2 = RecordTestUtils.replayAll(
               new FeaturesDelta(IMAGE2),
               DELTA2_RECORDS
       );
   
       public static final FeaturesImage IMAGE3 = new FeaturesImage(
               Map.of("bar", (short) 1),
               MetadataVersion.latestTesting()
       );
   
       private FeaturesImageTestFixtures() {
       }
   }
   ```



##########
core/src/test/scala/unit/kafka/server/KafkaApisTest.scala:
##########
@@ -86,7 +86,7 @@ import 
org.apache.kafka.coordinator.group.streams.StreamsGroupHeartbeatResult
 import org.apache.kafka.coordinator.share.{ShareCoordinator, 
ShareCoordinatorTestConfig}
 import org.apache.kafka.coordinator.transaction.TransactionLogConfig
 import org.apache.kafka.image.{MetadataDelta, MetadataImage, 
MetadataProvenance}
-import org.apache.kafka.metadata.{ConfigRepository, KRaftMetadataCache, 
MetadataCache, MetadataCacheTest, MockConfigRepository}
+import org.apache.kafka.metadata.{ConfigRepository, KRaftMetadataCache, 
MetadataCache, MetadataCacheTestFixtures, MockConfigRepository}

Review Comment:
   `SimpleConfigRepository` in the storage module could be replaced by 
`MockConfigRepository`



##########
metadata/src/testFixtures/java/org/apache/kafka/image/ProducerIdsImageTestFixtures.java:
##########
@@ -0,0 +1,61 @@
+/*
+ * 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.image;
+
+import org.apache.kafka.common.metadata.ProducerIdsRecord;
+import org.apache.kafka.metadata.RecordTestUtils;
+import org.apache.kafka.server.common.ApiMessageAndVersion;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public final class ProducerIdsImageTestFixtures {

Review Comment:
   ```java
   public final class ProducerIdsImageTestFixtures {
   
       public static final ProducerIdsImage IMAGE1 = new ProducerIdsImage(123);
   
       public static final List<ApiMessageAndVersion> DELTA1_RECORDS = List.of(
               new ApiMessageAndVersion(new 
ProducerIdsRecord().setBrokerId(2).setBrokerEpoch(100).setNextProducerId(456), 
(short) 0),
               new ApiMessageAndVersion(new 
ProducerIdsRecord().setBrokerId(3).setBrokerEpoch(100).setNextProducerId(780), 
(short) 0),
               new ApiMessageAndVersion(new 
ProducerIdsRecord().setBrokerId(3).setBrokerEpoch(100).setNextProducerId(785), 
(short) 0),
               new ApiMessageAndVersion(new 
ProducerIdsRecord().setBrokerId(2).setBrokerEpoch(100).setNextProducerId(800), 
(short) 0)
       );
   
       public static final ProducerIdsDelta DELTA1 = RecordTestUtils.replayAll(
               new ProducerIdsDelta(IMAGE1),
               DELTA1_RECORDS
       );
   
       public static final ProducerIdsImage IMAGE2 = new ProducerIdsImage(800);
   
       private ProducerIdsImageTestFixtures() {
       }
   }
   ```



##########
metadata/src/testFixtures/java/org/apache/kafka/image/ConfigurationsImageTestFixtures.java:
##########
@@ -0,0 +1,86 @@
+/*
+ * 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.image;
+
+import org.apache.kafka.common.config.ConfigResource;
+import org.apache.kafka.common.metadata.ConfigRecord;
+import org.apache.kafka.metadata.RecordTestUtils;
+import org.apache.kafka.metadata.SupportedConfigChecker;
+import org.apache.kafka.server.common.ApiMessageAndVersion;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import static org.apache.kafka.common.config.ConfigResource.Type.BROKER;
+import static 
org.apache.kafka.common.metadata.MetadataRecordType.CONFIG_RECORD;
+
+public final class ConfigurationsImageTestFixtures {

Review Comment:
   ```java
   public final class ConfigurationsImageTestFixtures {
   
       public static final ConfigurationsImage IMAGE1 = new 
ConfigurationsImage(Map.of(
               new ConfigResource(BROKER, "0"), new ConfigurationImage(new 
ConfigResource(BROKER, "0"), Map.of("foo", "bar", "baz", "quux")),
               new ConfigResource(BROKER, "1"), new ConfigurationImage(new 
ConfigResource(BROKER, "1"), Map.of("foobar", "foobaz"))
       ));
   
       public static final List<ApiMessageAndVersion> DELTA1_RECORDS = List.of(
               new ApiMessageAndVersion(new 
ConfigRecord().setResourceType(BROKER.id())
                       .setResourceName("0").setName("foo").setValue(null), 
CONFIG_RECORD.highestSupportedVersion()),
               new ApiMessageAndVersion(new 
ConfigRecord().setResourceType(BROKER.id())
                       .setResourceName("0").setName("baz").setValue(null), 
CONFIG_RECORD.highestSupportedVersion()),
               new ApiMessageAndVersion(new 
ConfigRecord().setResourceType(BROKER.id())
                       .setResourceName("1").setName("foobar").setValue(null), 
CONFIG_RECORD.highestSupportedVersion()),
               new ApiMessageAndVersion(new 
ConfigRecord().setResourceType(BROKER.id())
                       
.setResourceName("1").setName("barfoo").setValue("bazfoo"), 
CONFIG_RECORD.highestSupportedVersion()),
               new ApiMessageAndVersion(new 
ConfigRecord().setResourceType(BROKER.id())
                       .setResourceName("2").setName("foo").setValue("bar"), 
CONFIG_RECORD.highestSupportedVersion())
       );
   
       public static final ConfigurationsDelta DELTA1 = 
RecordTestUtils.replayAll(new ConfigurationsDelta(IMAGE1, 
SupportedConfigChecker.TRUE), DELTA1_RECORDS);
   
       public static final ConfigurationsImage IMAGE2 = new 
ConfigurationsImage(Map.of(
               new ConfigResource(BROKER, "1"), new ConfigurationImage(new 
ConfigResource(BROKER, "1"), Map.of("barfoo", "bazfoo")),
               new ConfigResource(BROKER, "2"), new ConfigurationImage(new 
ConfigResource(BROKER, "2"), Map.of("foo", "bar"))
       ));
   
       private ConfigurationsImageTestFixtures() {
       }
   }
   ```



##########
metadata/src/testFixtures/java/org/apache/kafka/metadata/authorizer/StandardAclWithIdTestFixtures.java:
##########
@@ -0,0 +1,42 @@
+/*
+ * 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.metadata.authorizer;
+
+import org.apache.kafka.common.Uuid;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public final class StandardAclWithIdTestFixtures {

Review Comment:
   ```java
   public final class StandardAclWithIdTestFixtures {
   
       public static final List<StandardAclWithId> TEST_ACLS = List.of(
               new StandardAclWithId(Uuid.fromString("QZDDv-R7SyaPgetDPGd0Mw"), 
StandardAclTestFixtures.TEST_ACLS.get(0)),
               new StandardAclWithId(Uuid.fromString("SdDjEdlbRmy2__WFKe3RMg"), 
StandardAclTestFixtures.TEST_ACLS.get(1)),
               new StandardAclWithId(Uuid.fromString("wQzt5gkSTwuQNXZF5gIw7A"), 
StandardAclTestFixtures.TEST_ACLS.get(2)),
               new StandardAclWithId(Uuid.fromString("ab_5xjJXSbS1o5jGfhgQXg"), 
StandardAclTestFixtures.TEST_ACLS.get(3)),
               new StandardAclWithId(Uuid.fromString("wP_cCK0LTEGSX9oDRInJHQ"), 
StandardAclTestFixtures.TEST_ACLS.get(4))
       );
   
       private StandardAclWithIdTestFixtures() {
       }
   }
   ```



##########
metadata/src/testFixtures/java/org/apache/kafka/image/ConfigurationsImageTestFixtures.java:
##########
@@ -0,0 +1,86 @@
+/*
+ * 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.image;
+
+import org.apache.kafka.common.config.ConfigResource;
+import org.apache.kafka.common.metadata.ConfigRecord;
+import org.apache.kafka.metadata.RecordTestUtils;
+import org.apache.kafka.metadata.SupportedConfigChecker;
+import org.apache.kafka.server.common.ApiMessageAndVersion;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import static org.apache.kafka.common.config.ConfigResource.Type.BROKER;
+import static 
org.apache.kafka.common.metadata.MetadataRecordType.CONFIG_RECORD;
+
+public final class ConfigurationsImageTestFixtures {

Review Comment:
   We need to make `RecordTestUtils.replayAll` return the input target to make 
the above code work



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