Github user tdas commented on a diff in the pull request: https://github.com/apache/spark/pull/20983#discussion_r180553748 --- Diff: sql/core/src/test/scala/org/apache/spark/sql/streaming/continuous/EpochCoordinatorSuite.scala --- @@ -0,0 +1,225 @@ +/* + * 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.spark.sql.streaming.continuous + +import org.mockito.InOrder +import org.mockito.Matchers.{any, eq => eqTo} +import org.mockito.Mockito._ +import org.scalatest.BeforeAndAfterEach +import org.scalatest.mockito.MockitoSugar + +import org.apache.spark._ +import org.apache.spark.rpc.RpcEndpointRef +import org.apache.spark.sql.execution.streaming.continuous._ +import org.apache.spark.sql.sources.v2.reader.streaming.{ContinuousReader, PartitionOffset} +import org.apache.spark.sql.sources.v2.writer.WriterCommitMessage +import org.apache.spark.sql.sources.v2.writer.streaming.StreamWriter +import org.apache.spark.sql.test.SharedSparkSession + +class EpochCoordinatorSuite + extends SparkFunSuite + with SharedSparkSession + with MockitoSugar + with BeforeAndAfterEach { + + private var epochCoordinator: RpcEndpointRef = _ + + private var writer: StreamWriter = _ + private var query: ContinuousExecution = _ + private var orderVerifier: InOrder = _ + + override def beforeEach(): Unit = { + val reader = mock[ContinuousReader] + writer = mock[StreamWriter] + query = mock[ContinuousExecution] + orderVerifier = inOrder(writer, query) + + epochCoordinator + = EpochCoordinatorRef.create(writer, reader, query, "test", 1, spark, SparkEnv.get) + } + + override def afterEach(): Unit = { + SparkEnv.get.rpcEnv.stop(epochCoordinator) + } + + test("single epoch") { + setWriterPartitions(3) + setReaderPartitions(2) + + commitPartitionEpoch(0, 1) + commitPartitionEpoch(1, 1) + commitPartitionEpoch(2, 1) + reportPartitionOffset(0, 1) + reportPartitionOffset(1, 1) + + // Here and in subsequent tests this is called to make a synchronous call to EpochCoordinator + // so that mocks would have been acted upon by the time verification happens + makeSynchronousCall() + + verifyCommit(1) + } + + test("single epoch, all but one writer partition has committed") { + setWriterPartitions(3) + setReaderPartitions(2) + + commitPartitionEpoch(0, 1) + commitPartitionEpoch(1, 1) + reportPartitionOffset(0, 1) + reportPartitionOffset(1, 1) + + makeSynchronousCall() + + verifyCommitHasntHappened(1) + } + + test("single epoch, all but one reader partition has reported an offset") { + setWriterPartitions(3) + setReaderPartitions(2) + + commitPartitionEpoch(0, 1) + commitPartitionEpoch(1, 1) + commitPartitionEpoch(2, 1) + reportPartitionOffset(0, 1) + + makeSynchronousCall() + + verifyCommitHasntHappened(1) --- End diff -- +1
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