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Native Scala mocking framework
Scala Java JavaScript
Latest commit cf8aa67 @pawel-wiejacha pawel-wiejacha ScalaMock-3.2.2

ScalaMock Build Status

Native Scala mocking.

Official website:


Expectations-First Style

def testTurtle {
  val m = mock[Turtle]                              // Create mock Turtle object

  (m.setPosition _).expects(10.0, 10.0)             //
  (m.forward _).expects(5.0)                        // Set expectations
  (m.getPosition _).expects().returning(15.0, 10.0) // 

  drawLine(m, (10.0, 10.0), (15.0, 10.0))           // Exercise System Under Test

Record-then-Verify (Mockito) Style

def testTurtle {
  val m = stub[Turtle]                              // Create stub Turtle

  (m.getPosition _).when().returns(15.0, 10.0)      // Setup return values

  drawLine(m, (10.0, 10.0), (15.0, 10.0))           // Exercise System Under Test

  (m.setPosition _).verify(10.0, 10.0)              // Verify expectations met
  (m.forward _).verify(5.0)                         //

Full worked example


  • Fully typesafe
  • Full support for Scala features such as:
    • Polymorphic (type parameterised) methods
    • Operators (methods with symbolic names)
    • Overloaded methods
    • Type constraints
  • ScalaTest and Specs2 integration


Download from Sonatype.

To use ScalaMock in sbt with ScalaTest add the following to your project file:

libraryDependencies +=
  "org.scalamock" %% "scalamock-scalatest-support" % "3.2.2" % "test"

and with Specs2:

libraryDependencies +=
  "org.scalamock" %% "scalamock-specs2-support" % "3.2.2" % "test"


Future Plans

Check our roadmap.


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