[FLINK-29316] Test packaging
diff --git a/flink-sql-connector-elasticsearch6/pom.xml b/flink-sql-connector-elasticsearch6/pom.xml
index 14f35d6..f6d0ccb 100644
--- a/flink-sql-connector-elasticsearch6/pom.xml
+++ b/flink-sql-connector-elasticsearch6/pom.xml
@@ -44,6 +44,12 @@
 			<artifactId>flink-connector-elasticsearch6</artifactId>
 			<version>${project.version}</version>
 		</dependency>
+		<dependency>
+			<groupId>org.apache.flink</groupId>
+			<artifactId>flink-test-utils</artifactId>
+			<version>${flink.version}</version>
+			<scope>test</scope>
+		</dependency>
 	</dependencies>
 
 	<build>
diff --git a/flink-sql-connector-elasticsearch6/src/test/java/org/apache/flink/connectors/elasticsearch/PackagingITCase.java b/flink-sql-connector-elasticsearch6/src/test/java/org/apache/flink/connectors/elasticsearch/PackagingITCase.java
new file mode 100644
index 0000000..9971bae
--- /dev/null
+++ b/flink-sql-connector-elasticsearch6/src/test/java/org/apache/flink/connectors/elasticsearch/PackagingITCase.java
@@ -0,0 +1,48 @@
+/*
+ * 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.flink.connectors.elasticsearch;
+
+import org.apache.flink.packaging.PackagingTestUtils;
+import org.apache.flink.table.factories.Factory;
+import org.apache.flink.test.resources.ResourceTestUtils;
+
+import org.junit.jupiter.api.Test;
+
+import java.nio.file.Path;
+import java.util.Arrays;
+
+class PackagingITCase {
+
+    @Test
+    void testPackaging() throws Exception {
+        final Path jar =
+                ResourceTestUtils.getResource(".*/flink-sql-connector-elasticsearch6-[^/]*\\.jar");
+
+        PackagingTestUtils.assertJarContainsOnlyFilesMatching(
+                jar,
+                Arrays.asList(
+                        "META-INF/",
+                        "org/apache/flink/connector/base/",
+                        "org/apache/flink/connector/elasticsearch/",
+                        "org/apache/flink/elasticsearch6/",
+                        "org/apache/flink/streaming/connectors/elasticsearch/",
+                        "org/apache/flink/streaming/connectors/elasticsearch6/"));
+        PackagingTestUtils.assertJarContainsServiceEntry(jar, Factory.class);
+    }
+}
diff --git a/flink-sql-connector-elasticsearch7/pom.xml b/flink-sql-connector-elasticsearch7/pom.xml
index 43a42dc..91409b6 100644
--- a/flink-sql-connector-elasticsearch7/pom.xml
+++ b/flink-sql-connector-elasticsearch7/pom.xml
@@ -44,6 +44,12 @@
 			<artifactId>flink-connector-elasticsearch7</artifactId>
 			<version>${project.version}</version>
 		</dependency>
+		<dependency>
+			<groupId>org.apache.flink</groupId>
+			<artifactId>flink-test-utils</artifactId>
+			<version>${flink.version}</version>
+			<scope>test</scope>
+		</dependency>
 	</dependencies>
 
 	<build>
diff --git a/flink-sql-connector-elasticsearch7/src/test/java/org/apache/flink/connectors/elasticsearch/PackagingITCase.java b/flink-sql-connector-elasticsearch7/src/test/java/org/apache/flink/connectors/elasticsearch/PackagingITCase.java
new file mode 100644
index 0000000..790c90e
--- /dev/null
+++ b/flink-sql-connector-elasticsearch7/src/test/java/org/apache/flink/connectors/elasticsearch/PackagingITCase.java
@@ -0,0 +1,48 @@
+/*
+ * 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.flink.connectors.elasticsearch;
+
+import org.apache.flink.packaging.PackagingTestUtils;
+import org.apache.flink.table.factories.Factory;
+import org.apache.flink.test.resources.ResourceTestUtils;
+
+import org.junit.jupiter.api.Test;
+
+import java.nio.file.Path;
+import java.util.Arrays;
+
+class PackagingITCase {
+
+    @Test
+    void testPackaging() throws Exception {
+        final Path jar =
+                ResourceTestUtils.getResource(".*/flink-sql-connector-elasticsearch7-[^/]*\\.jar");
+
+        PackagingTestUtils.assertJarContainsOnlyFilesMatching(
+                jar,
+                Arrays.asList(
+                        "META-INF/",
+                        "org/apache/flink/connector/base/",
+                        "org/apache/flink/connector/elasticsearch/",
+                        "org/apache/flink/elasticsearch7/",
+                        "org/apache/flink/streaming/connectors/elasticsearch/",
+                        "org/apache/flink/streaming/connectors/elasticsearch7/"));
+        PackagingTestUtils.assertJarContainsServiceEntry(jar, Factory.class);
+    }
+}