streaming/src/test/scala/org/apache/gearpump/streaming/source/DataSourceTaskSpec.scala

/*
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 * 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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 * See the License for the specific language governing permissions and
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package org.apache.gearpump.streaming.source

import java.time.Instant

import org.apache.gearpump.Message
import org.apache.gearpump.cluster.UserConfig
import org.apache.gearpump.streaming.MockUtil
import org.apache.gearpump.streaming.dsl.plan.functions.SingleInputFunction
import org.mockito.Mockito._
import org.scalacheck.Gen
import org.scalatest.mock.MockitoSugar
import org.scalatest.{Matchers, PropSpec}
import org.scalatest.prop.PropertyChecks

class DataSourceTaskSpec extends PropSpec with PropertyChecks with Matchers with MockitoSugar {

  property("DataSourceTask.onStart should call DataSource.open") {
    forAll(Gen.chooseNum[Long](0L, 1000L).map(Instant.ofEpochMilli)) { (startTime: Instant) =>
      val taskContext = MockUtil.mockTaskContext
      implicit val system = MockUtil.system
      val dataSource = mock[DataSource]
      val config = UserConfig.empty
        .withInt(DataSourceConfig.SOURCE_READ_BATCH_SIZE, 1)
      val operator = mock[SingleInputFunction[Any, Any]]
      val sourceTask = new DataSourceTask[Any, Any](taskContext, config, dataSource, Some(operator))

      sourceTask.onStart(startTime)

      verify(dataSource).open(taskContext, startTime)
      verify(operator).setup()
    }
  }

  property("DataSourceTask.onNext should call DataSource.read") {
    forAll(Gen.alphaStr) { (str: String) =>
      val taskContext = MockUtil.mockTaskContext
      implicit val system = MockUtil.system
      val dataSource = mock[DataSource]
      val config = UserConfig.empty
        .withInt(DataSourceConfig.SOURCE_READ_BATCH_SIZE, 1)

      val sourceTask = new DataSourceTask[Any, Any](taskContext, config, dataSource, None)
      val msg = Message(str)
      when(dataSource.read()).thenReturn(msg)

      sourceTask.onNext(Message("next"))
      verify(taskContext).output(msg)
    }
  }

  property("DataSourceTask.onStop should call DataSource.close") {
    val taskContext = MockUtil.mockTaskContext
    implicit val system = MockUtil.system
    val dataSource = mock[DataSource]
    val config = UserConfig.empty
      .withInt(DataSourceConfig.SOURCE_READ_BATCH_SIZE, 1)
    val operator = mock[SingleInputFunction[Any, Any]]
    val sourceTask = new DataSourceTask[Any, Any](taskContext, config, dataSource, Some(operator))

    sourceTask.onStop()

    verify(dataSource).close()
    verify(operator).teardown()
  }
}