add junit

.travis.yml

@@ -5,7 +5,7 @@ language: scala
 scala:
 - 2.10.6
 - 2.11.8
-- 2.12.0-M5
+- 2.12.1
 
 jdk:
 - oraclejdk8
@@ -21,4 +21,4 @@ cache:
   directories:
     - $HOME/.ivy2/cache
     - $HOME/.sbt/boot
-    - $HOME/.sbt/launchers/0.13.12
+    - $HOME/.sbt/launchers/0.13.13

build.sbt

@@ -4,7 +4,7 @@ licenses += ("MIT", url("http://opensource.org/licenses/MIT"))
 homepage := Some(url("http://github.com/non/kind-projector"))
 
 scalaVersion := "2.11.8"
-crossScalaVersions := Seq("2.10.6", "2.11.8", "2.12.0")
+crossScalaVersions := Seq("2.10.6", "2.11.8", "2.12.1")
 
 libraryDependencies += "org.scala-lang" % "scala-compiler" % scalaVersion.value
 libraryDependencies ++= (scalaBinaryVersion.value match {
@@ -38,7 +38,8 @@ scalacOptions in Test += "-Xplugin:" + (packageBin in Compile).value
 
 scalacOptions in Test += "-Yrangepos"
 
-test := (run in Test).toTask("").value
+libraryDependencies += "com.novocode" % "junit-interface" % "0.11" % "test"
+testOptions += Tests.Argument(TestFrameworks.JUnit, "-a", "-v")
 
 def scala210ExtraDeps = Seq(
   compilerPlugin("org.scalamacros" % "paradise" % "2.1.0" cross CrossVersion.full),

project/build.properties

@@ -1 +1 @@
-sbt.version=0.13.12
+sbt.version=0.13.13

src/test/scala/polylambda.scala

@@ -1,5 +1,7 @@
 package d_m
 
+import org.junit.Test
+
 trait ~>[-F[_], +G[_]] {
   def apply[A](x: F[A]): G[A]
 }
@@ -8,7 +10,7 @@ trait ~>>[-F[_], +G[_]] {
 }
 final case class Const[A, B](getConst: A)
 
-object PolyLambdas {
+class PolyLambdas {
   type ToSelf[F[_]] = F ~> F
 
   val kf1 = Lambda[Option ~> Vector](_.toVector)
@@ -45,7 +47,8 @@ object PolyLambdas {
   def const5[A] : ToSelf[Const[A, ?]]        = λ[ToSelf[λ[B => Const[A, B]]]](x => x)
   def const6[A] : Const[A, ?] ~> Const[A, ?] = λ[ToSelf[λ[B => Const[A, B]]]](x => x)
 
-  def main(args: Array[String]): Unit = {
+  @Test
+  def polylambda(): Unit = {
     assert(kf1(None) == Vector())
     assert(kf1(Some("a")) == Vector("a"))
     assert(kf1(Some(5d)) == Vector(5d))