P06 (*) Find out whether a list is a palindrome.

P06.scala

package com.learner.s99

/**
 * P06 (*) Find out whether a list is a palindrome.
 * Example:
 * scala> isPalindrome(List(1, 2, 3, 2, 1))
 * res0: Boolean = true
 */
object P06 {
  def isPalindrome[T](l:List[T]):Boolean = l == l.reverse
}

P06Spec.scala

package com.learner.s99

import com.learner.s99.P06.isPalindrome
import org.scalatest.{MustMatchers, FlatSpec}

class P06Spec extends FlatSpec
with MustMatchers {
  behavior of "A List"

  it must "return 'true' for List(1,2,3,2,1) as palindrome" in {
    isPalindrome(List(1, 2, 3, 2, 1)) mustBe true
  }

  it must "return 'true' for empty list as palindrome" in {
    isPalindrome(List()) mustBe true
  }

  it must "return 'false' for List(1,2,3,2,1) as palindrome" in {
    isPalindrome(List(1, 2, 1, 3, 2, 1)) mustBe false
  }
}