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

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 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
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 *      http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.gearpump.streaming.dsl.task

import java.time.{Duration, Instant}

import org.apache.gearpump.Message
import org.apache.gearpump.cluster.UserConfig
import org.apache.gearpump.streaming.MockUtil
import org.apache.gearpump.streaming.dsl.window.api.{EventTimeTrigger, SlidingWindow}
import org.apache.gearpump.streaming.dsl.window.impl.{GroupAlsoByWindow, WindowRunner}
import org.mockito.Matchers._
import org.mockito.Mockito._
import org.scalacheck.Gen
import org.scalatest.{Matchers, PropSpec}
import org.scalatest.mock.MockitoSugar
import org.scalatest.prop.PropertyChecks

class EventTimeTriggerTaskSpec extends PropSpec with PropertyChecks
  with Matchers with MockitoSugar {

  property("EventTimeTriggerTask should trigger on watermark") {
    val longGen = Gen.chooseNum[Long](1L, 1000L)
    val windowSizeGen = longGen
    val windowStepGen = longGen
    val watermarkGen = longGen.map(Instant.ofEpochMilli)

    forAll(windowSizeGen, windowStepGen, watermarkGen) {
      (windowSize: Long, windowStep: Long, watermark: Instant) =>

        val window = SlidingWindow.apply[Any](Duration.ofMillis(windowSize),
          Duration.ofMillis(windowStep)).triggering(EventTimeTrigger)
        val groupBy = mock[GroupAlsoByWindow[Any, Any]]
        val windowRunner = mock[WindowRunner]
        val context = MockUtil.mockTaskContext
        val config = UserConfig.empty

        when(groupBy.window).thenReturn(window)

        val task = new EventTimeTriggerTask[Any, Any](groupBy, windowRunner, context, config)

        val message = mock[Message]
        task.onNext(message)
        verify(windowRunner).process(message)

        task.onWatermarkProgress(watermark)
        verify(windowRunner).trigger(any[Instant])
    }
  }

}