[HUDI-1075] Implement simple clustering strategies to create ClusteringPlan and to run the plan

hudi-common/src/test/java/org/apache/hudi/common/util/TestSerializableSchema.java

@@ -0,0 +1,68 @@
+/*
+ * 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.hudi.common.util;
+
+import org.apache.avro.Schema;
+import org.apache.hudi.avro.HoodieAvroUtils;
+import org.apache.hudi.common.config.SerializableSchema;
+import org.apache.hudi.common.testutils.HoodieTestDataGenerator;
+import org.junit.jupiter.api.Test;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/**
+ * Tests serializable schema.
+ */
+public class TestSerializableSchema {
+
+  @Test
+  public void testSerDeser() throws IOException {
+    verifySchema(HoodieTestDataGenerator.AVRO_TRIP_SCHEMA);
+    verifySchema(HoodieAvroUtils.addMetadataFields(HoodieTestDataGenerator.AVRO_TRIP_SCHEMA));
+    verifySchema(HoodieTestDataGenerator.AVRO_SHORT_TRIP_SCHEMA);
+    verifySchema(HoodieAvroUtils.addMetadataFields(HoodieTestDataGenerator.AVRO_SHORT_TRIP_SCHEMA));
+    verifySchema(HoodieTestDataGenerator.FLATTENED_AVRO_SCHEMA);
+    verifySchema(HoodieAvroUtils.addMetadataFields(HoodieTestDataGenerator.FLATTENED_AVRO_SCHEMA));
+    verifySchema(HoodieTestDataGenerator.AVRO_SCHEMA_WITH_METADATA_FIELDS);
+  }
+  
+  private void verifySchema(Schema schema) throws IOException {
+    SerializableSchema serializableSchema = new SerializableSchema(schema);
+    assertEquals(schema, serializableSchema.get());
+    assertTrue(schema != serializableSchema.get());
+
+    ByteArrayOutputStream baos = new ByteArrayOutputStream();
+    ObjectOutputStream oos = new ObjectOutputStream(baos);
+    serializableSchema.writeObjectTo(oos);
+    oos.flush();
+    oos.close();
+    
+    byte[] bytesWritten = baos.toByteArray();
+    SerializableSchema newSchema = new SerializableSchema();
+    newSchema.readObjectFrom(new ObjectInputStream(new ByteArrayInputStream(bytesWritten)));
+    assertEquals(schema, newSchema.get());
+  }
+}