Scala School - Testing with specs2 examples

build.sbt

organization := "com.gk"

name := "sandbox"

version := "0.1"

scalaVersion := "2.9.1"

libraryDependencies ++= Seq(
  "junit"          % "junit"     % "4.9"     % "test"   withSources(),
  "org.scalatest" %% "scalatest" % "2.2.1"   % "test"   withSources(),
  "org.specs2"    %% "specs2"    % "2.4.15"  % "test"   withSources()
)

scalatest.scala

import org.scalatest.FunSuite
import org.scalatest.matchers.ShouldMatchers
import org.mockito.Mockito._

abstract class Foo {
  def getSomething(): String
}

class WithMockitoSuite extends FunSuite with ShouldMatchers {
  test("mockito") {
     val foo = mock(classOf[Foo]) 
     when(foo.getSomething()).thenReturn("sss")
     foo.getSomething() should be("sss")
  }
}

specs2.scala

//import org.specs._
import org.specs2.mutable._
object ArithmeticSpec extends Specification {
  "Arithmetic" should {
    "add two numbers" in {
      1 + 1 mustEqual 2
    }
    "add three numbers" in {
      1 + 1 + 1 mustEqual 3
    }
  }
}

//import org.specs._
import org.specs2.mutable._
object ArithmeticSpec2 extends Specification {
  "Arithmetic2" should {
    "add" in {
      "two numbers" in {
        1 + 1 mustEqual 2
      }
      "three numbers" in {
        1 + 1 + 1 mustEqual 3
      }
    }
  }
}

object ExecSpec extends Specification {
  "Mutations are isolated" should {
    var x = 0
    "x equals 1 if we set it." in {
      x = 1
      x mustEqual 1
    }
    var y = 0
    "y is the default value if we don't change it" in {
      y mustEqual 0
    }
  }
}

import org.specs2.specification._
object BeforeAfterSpec extends Specification with BeforeExample with AfterExample {
  def before = () => println("reset the system")
  def after = () => println("clean things up")
  "my system" should {
    // doBefore { resetTheSystem() }
    "mess up the system" in {
      println("mess up the system...")
      1 mustEqual 1
    }
    "and again" in {
      println("and again...")
      1 mustEqual 1
    }
    //  doAfter { cleanThingsUp() }
  }
}

object MatcherSpec extends Specification {
  "mathers" should {
    "be available" in {
      1 mustEqual 1
      "a" mustEqual "a"
    }
    "be available for elements in a sequence" in {
      // http://etorreborre.github.com/specs2/guide/org.specs2.guide.Matchers.html#Matchers+guide
      val numbers = List(1, 2, 3)
      numbers must contain(1)
      numbers must not contain(4)
      // numbers must containAll(List(1, 2, 3))
      numbers must contain(1, 2, 3)
      // numbers must containInOrder(List(1, 2, 3))
      numbers must contain(1, 2, 3).only.inOrder
      List(1, List(2, 3, List(4)), 5) must haveTheSameElementsAs(List(5, List(List(4), 2, 3), 1))
    }
  }
  "map" should {
    "be available" in {
      val (k,v) = ('kkk, 'vvv)
      val map = Map(k -> v)
      map must haveKey(k)
      // map must notHaveKey(k)
      map must not(haveKey('kkkk))
      map must haveValue(v)
      // map must notHaveValue(v)
      map must not(haveValue('vvvv))
    }
  }
  "numbers" should {
    "be available" in {
      2 must beGreaterThan(1)
      2 must beGreaterThanOrEqualTo(2)
      1 must beLessThan(2)
      1 must beLessThanOrEqualTo(1)
      1 must beCloseTo(1, 1)
    }
  }
  "options" should {
    "be available" in {
      None must beNone
      Some(123) must beSome[Int]
      // Some("aaa") must beSomething
      Some("foo") must beSome("foo")
    }
  }
  "throwA" should {
    "be available" in {
      def a: Int = { throw new Exception("bad thing") }
      a must throwA[Exception]
      a must throwA(new Exception("bad thing"))
    }
  }
}

import org.specs2.matcher._
object OwnMatcherSpec extends Specification {
  "A matcher" should {
    "be created as a method" in {
      // http://etorreborre.github.com/specs2/guide/org.specs2.guide.Matchers.html#Matchers+guide
      // Matcher creation
      def allBeGreaterThan2: Matcher[Seq[Int]] = be_>=(2).forall
      Seq(3,4,5) must allBeGreaterThan2
    }
  }
}

import org.specs2.matcher._
import org.specs2.mock.Mockito
abstract class Foo[T] {
  def get(i: Int): T 
}
object MockExampleSpec extends Specification with Mockito {
  "mock" should {
    "be available" in {
      val m = mock[Foo[String]]
      m.get(0) returns "one"
      m.get(0) mustEqual "one"
      there was one(m).get(0)
      there was no(m).get(1)
    }
  }
}

/* NOT WORK
import org.mockito.Mockito._
object SpiesSpec extends Specification with Mockito {
  "spy" should {
    "be available" in {
      val list = new collection.mutable.LinkedList[String]
      val spiedList = spy(list)
      spiedList.++("one")
      there was one(spiedList).++("one")
    }
  }
}
*/