/*
 * 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.functional

import org.apache.hudi.config.HoodieWriteConfig
import org.apache.hudi.testutils.HoodieSparkClientTestBase
import org.apache.hudi.{DataSourceWriteOptions, HoodieDataSourceHelpers}
import org.apache.spark.sql.{SaveMode, SparkSession}
import org.junit.jupiter.api.Assertions.assertEquals
import org.junit.jupiter.api.{AfterEach, BeforeEach}
import org.junit.jupiter.params.ParameterizedTest
import org.junit.jupiter.params.provider.ValueSource

class TestEmptyCommit extends HoodieSparkClientTestBase {
  var spark: SparkSession = _
  val commonOpts = Map(
    "hoodie.insert.shuffle.parallelism" -> "4",
    "hoodie.upsert.shuffle.parallelism" -> "4",
    DataSourceWriteOptions.RECORDKEY_FIELD.key -> "_row_key",
    DataSourceWriteOptions.PARTITIONPATH_FIELD.key -> "partition",
    DataSourceWriteOptions.PRECOMBINE_FIELD.key -> "timestamp",
    HoodieWriteConfig.TBL_NAME.key -> "hoodie_test"
  )

  @BeforeEach override def setUp() {
    initPath()
    initSparkContexts()
    spark = sqlContext.sparkSession
    initTestDataGenerator()
    initFileSystem()
  }

  @AfterEach override def tearDown() = {
    cleanupSparkContexts()
    cleanupTestDataGenerator()
    cleanupFileSystem()
  }

  @ParameterizedTest
  @ValueSource(booleans = Array(true, false))
  def testWithEmptyInput(allowEmptyCommit: Boolean): Unit = {
    val inputDF1 = spark.read.json(spark.sparkContext.parallelize(Seq.empty[String], 1))
    inputDF1.write.format("org.apache.hudi")
      .options(commonOpts)
      .option(DataSourceWriteOptions.OPERATION.key(), DataSourceWriteOptions.INSERT_OPERATION_OPT_VAL)
      .option(HoodieWriteConfig.ALLOW_EMPTY_COMMIT.key(), allowEmptyCommit.toString)
      .mode(SaveMode.Overwrite)
      .save(basePath)
    assertEquals(allowEmptyCommit, HoodieDataSourceHelpers.hasNewCommits(fs, basePath, "000"))
  }
}
