streaming/src/test/scala/org/apache/gearpump/streaming/dsl/task/TransformTaskSpec.scala

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

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.FunctionRunner
import org.mockito.Mockito.{verify, when}
import org.scalacheck.Gen
import org.scalatest.{Matchers, PropSpec}
import org.scalatest.mock.MockitoSugar
import org.scalatest.prop.PropertyChecks

class TransformTaskSpec extends PropSpec with PropertyChecks with Matchers with MockitoSugar {

  property("TransformTask.onStart should call SingleInputFunction.setup") {
    forAll(Gen.chooseNum[Long](0L, 1000L).map(Instant.ofEpochMilli)) { (startTime: Instant) =>
      val taskContext = MockUtil.mockTaskContext
      implicit val system = MockUtil.system
      val config = UserConfig.empty
      val operator = mock[FunctionRunner[Any, Any]]
      val sourceTask = new TransformTask[Any, Any](Some(operator), taskContext, config)

      sourceTask.onStart(startTime)

      verify(operator).setup()
    }
  }

  property("TransformTask.onNext should call SingleInputFunction.process") {
    forAll(Gen.alphaStr) { (str: String) =>
      val taskContext = MockUtil.mockTaskContext
      implicit val system = MockUtil.system
      val config = UserConfig.empty
      val operator = mock[FunctionRunner[Any, Any]]
      val task = new TransformTask[Any, Any](Some(operator), taskContext, config)
      val msg = Message(str)
      when(operator.process(str)).thenReturn(Some(str))

      task.onNext(msg)

      verify(taskContext).output(msg)
    }
  }

  property("DataSourceTask.onStop should call SingleInputFunction.setup") {
    val taskContext = MockUtil.mockTaskContext
    implicit val system = MockUtil.system
    val config = UserConfig.empty
    val operator = mock[FunctionRunner[Any, Any]]
    val task = new TransformTask[Any, Any](Some(operator), taskContext, config)

    task.onStop()

    verify(operator).teardown()
  }
}