streaming/src/test/scala/org/apache/gearpump/streaming/task/SubscriberSpec.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
 * with the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.gearpump.streaming.task

import org.scalatest.{FlatSpec, Matchers}

import org.apache.gearpump.streaming.partitioner.{HashPartitioner, Partitioner}
import org.apache.gearpump.streaming.task.SubscriberSpec.TestTask
import org.apache.gearpump.streaming.{DAG, ProcessorDescription}
import org.apache.gearpump.util.Graph
import org.apache.gearpump.util.Graph._

class SubscriberSpec extends FlatSpec with Matchers {
  "Subscriber.of" should "return all subscriber for a processor" in {

    val sourceProcessorId = 0
    val task1 = ProcessorDescription(id = sourceProcessorId, taskClass =
      classOf[TestTask].getName, parallelism = 1)
    val task2 = ProcessorDescription(id = 1, taskClass = classOf[TestTask].getName, parallelism = 1)
    val task3 = ProcessorDescription(id = 2, taskClass = classOf[TestTask].getName, parallelism = 1)
    val partitioner = Partitioner[HashPartitioner]
    val dag = DAG(Graph(task1 ~ partitioner ~> task2, task1 ~ partitioner ~> task3,
      task2 ~ partitioner ~> task3))

    val subscribers = Subscriber.of(sourceProcessorId, dag)
    assert(subscribers.size == 2)

    assert(subscribers.toSet ==
      Set(Subscriber(1, partitioner, task2.parallelism, task2.life), Subscriber(2, partitioner,
        task3.parallelism, task3.life)))
  }
}

object SubscriberSpec {
  class TestTask
}