ambari-metrics-anomaly-detection-service/src/test/scala/org/apache/ambari/metrics/adservice/common/ADManagerConfigurationTest.scala

package org.apache.ambari.metrics.adservice.common

import org.scalatest.FlatSpec

import scala.collection.mutable

class ADServiceConfigurationTest extends FlatSpec {

  "A Stack" should "pop values in last-in-first-out order" in {
    val stack = new mutable.Stack[Int]
    stack.push(1)
    stack.push(2)
    assert(stack.pop() === 2)
    assert(stack.pop() === 1)
  }

  it should "throw NoSuchElementException if an empty stack is popped" in {
    val emptyStack = new mutable.Stack[String]
    assertThrows[NoSuchElementException] {
      emptyStack.pop()
    }
  }
}