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package org.apache.spark.graphx

import java.io.File
import java.io.FileOutputStream
import java.io.OutputStreamWriter

import org.apache.spark.SparkFunSuite
import org.apache.spark.util.Utils

class GraphLoaderSuite extends SparkFunSuite with LocalSparkContext {

  test("GraphLoader.edgeListFile") {
    withSpark { sc =>
      val tmpDir = Utils.createTempDir()
      val graphFile = new File(tmpDir.getAbsolutePath, "graph.txt")
      val writer = new OutputStreamWriter(new FileOutputStream(graphFile))
      for (i <- (1 until 101)) writer.write(s"$i 0\n")
      writer.close()
      try {
        val graph = GraphLoader.edgeListFile(sc, tmpDir.getAbsolutePath)
        val neighborAttrSums = graph.aggregateMessages[Int](
          ctx => ctx.sendToDst(ctx.srcAttr),
          _ + _)
        assert(neighborAttrSums.collect.toSet === Set((0: VertexId, 100)))
      } finally {
        Utils.deleteRecursively(tmpDir)
      }
    }
  }
}

Add a test for GraphLoader.edgeListFile
[SPARK-5882][GRAPHX] Add a test for GraphLoader.edgeListFile

Author: Takeshi YAMAMURO <linguin.m.s@gmail.com>

Closes #4674 from maropu/AddGraphLoaderSuite.
