greencatsoft / greenlight   0.3

Apache License 2.0 GitHub

BDD style testing framework for Scala and Scala.js.

Scala versions: 2.11
Scala.js versions: 0.6


Greenlight is a BDD style testing framework for Scala and Scala.js, which provides an extensible matcher API with fluent syntax.


The project is at a very early stage of development, so it should be used with caution.

How to Use

SBT Settings

Add the following lines to your sbt build definition:

libraryDependencies += "com.greencatsoft" %%% "greenlight" % "0.3"

And override the default testing framework like below:

testFrameworks := Seq(new TestFramework("com.greencatsoft.greenlight.Greenlight"))

If you want to test the latest snapshot version instead, change the version to 0.4-SNAPSHOT and add Sonatype snapshot repository to the resolver as follows:

resolvers += 
  "Sonatype OSS Snapshots" at ""

Or more simply as,

resolvers += Resolver.sonatypeRepo("snapshots")

Code Example

object FrameworkTest extends TestSuite {

  "The framework" should "be able to test equality" in {

    (1 + 1) must be (2)

    ("A" + "B") should be ("AB")

    "Scala.js" must not be ("overlooked!")

  It should "be able to check if a collection is empty" in {

    List(1, 2, 3) must not be (empty)

    Seq.empty must be (empty)

  It can "check if an option is defined or not" in {

    val value = Some("value")

    value must be (defined)
    value should not be (empty)

    None must be (empty)
    None should not be (defined)

  It can "also check if a string value is empty" in {

    val emptyValue = ""

    emptyValue must be (defined)
    emptyValue must be (empty)

    val nullValue: String = null

    nullValue should be (empty)
    nullValue should not be (defined)

    val value = "Scala"

    value must not be (empty)
    value should be (defined)

  It can "also check if a collection contains an item or not" in {

    val collection = Seq("a", "b", "c", "d")

    collection must contain ("a")
    collection must contain ("b")
    collection must not contain ("e")

  // You can skip a test case by using 'might' instead of 'should/must/can'.
  It might "not be ready for prime time" in {
    "You" should be ("joking!")

  It can "be used to test if an exception is thrown" in {

    A_[NullPointerException] should be_thrown_in {

    A_[NullPointerException] should not be_thrown_in {
      println("Scala.js rocks!")

object LifeCycleTest extends TestSuite with BeforeAndAfter {

  var specification: Option[String] = None

  before { (s: Statement) =>
    this.specification = Some(s.description)

  after {
    this.specification = None

  "BeforeAndAfter trait" can "be used to be notified before and after a specification" in {
    specification should not be (empty)
    specification foreach { it =>
      it should be ("BeforeAndAfter trait can be used to be notified before and after a specification")