Github user squito commented on a diff in the pull request: https://github.com/apache/spark/pull/5563#discussion_r33358265 --- Diff: core/src/test/scala/org/apache/spark/scheduler/cluster/mesos/MesosSchedulerUtilsSuite.scala --- @@ -0,0 +1,104 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one 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, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.spark.scheduler.cluster.mesos + +import org.apache.spark.{SparkFunSuite, SparkConf, SparkContext} +import org.mockito.Mockito._ +import org.scalatest._ +import org.scalatest.mock.MockitoSugar + +class MesosSchedulerUtilsSuite extends SparkFunSuite with Matchers with MockitoSugar { + + // scalastyle:off structural.type + // this is the documented way of generating fixtures in scalatest + def fixture: Object {val sc: SparkContext; val sparkConf: SparkConf} = new { + val sparkConf = new SparkConf + val sc = mock[SparkContext] + when(sc.conf).thenReturn(sparkConf) + } + val utils = new MesosSchedulerUtils { } + // scalastyle:on structural.type + + test("use at-least minimum overhead") { + val f = fixture + // 384 > sc.executorMemory * 0.1 => 512 + 384 = 896 + when(f.sc.executorMemory).thenReturn(512) + utils.calculateTotalMemory(f.sc) shouldBe 896 + } + + test("use overhead if it is greater than minimum value") { + val f = fixture + // 384 > sc.executorMemory * 0.1 => 512 + 384 = 896 + when(f.sc.executorMemory).thenReturn(4096) + utils.calculateTotalMemory(f.sc) shouldBe 4505 + } + + test("use spark.mesos.executor.memoryOverhead (if set)") { + val f = fixture + val utils = new MesosSchedulerUtils { } + // 384 > sc.executorMemory * 0.1 => 512 + 384 = 896 + when(f.sc.executorMemory).thenReturn(1024) + f.sparkConf.set("spark.mesos.executor.memoryOverhead", "512") + utils.calculateTotalMemory(f.sc) shouldBe 1536 + } + + test("parse a non-empty constraint string correctly") { + val expectedMap = Map( + "tachyon" -> Set("true"), + "zone" -> Set("us-east-1a", "us-east-1b") + ) + utils.parseConstraintString("tachyon:true;zone:us-east-1a,us-east-1b") should be (expectedMap) + } + + test("parse an empty constraint string correctly") { + val utils = new MesosSchedulerUtils { } + utils.parseConstraintString("") shouldBe Map() + } + + test("throw an exception when the input is malformed") { + an[IllegalArgumentException] should be thrownBy + utils.parseConstraintString("tachyon;zone:us-east") + } + + test("empty values for attributes' constraints matches all values") { + val constraintsStr = "tachyon:" + val parsedConstraints = utils.parseConstraintString(constraintsStr) + + parsedConstraints shouldBe Map("tachyon" -> Set()) + + val `offer with no tachyon` = Map("zone" -> Set("us-east-1a", "us-east-1b")) + val `offer with tachyon:true` = Map("tachyon" -> Set("true")) + val `offer with tachyon:false` = Map("tachyon" -> Set("false")) --- End diff -- I'd prefer we avoid crazy variable names, and stick w/ standard java style camelcase. `offerWithNoTachyon` etc.
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