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 * 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,
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package org.apache.spark.sql.avro

import org.apache.hudi.avro.model.HoodieMetadataColumnStats
import org.apache.spark.sql.avro.SchemaConverters.SchemaType
import org.junit.Test
import org.junit.jupiter.api.Assertions.assertEquals

class TestSchemaConverters {

  @Test
  def testAvroUnionConversion(): Unit = {
    val originalAvroSchema = HoodieMetadataColumnStats.SCHEMA$

    val SchemaType(convertedStructType, _) = SchemaConverters.toSqlType(originalAvroSchema)
    val convertedAvroSchema = SchemaConverters.toAvroType(convertedStructType)

    // NOTE: Here we're validating that converting Avro -> Catalyst and Catalyst -> Avro are inverse
    //       transformations, but since it's not an easy endeavor to match Avro schemas, we match
    //       derived Catalyst schemas instead
    assertEquals(convertedStructType, SchemaConverters.toSqlType(convertedAvroSchema).dataType)
  }

}
