Scala 3

Java classes

Mocking of non-abstract java classes is not available without workaround.

Issue

public class JavaClass {
    public int simpleMethod(String b) { return 4; }
}

val m = mock[JavaClass] // No longer compiles

class JavaClassExtended extends JavaClass

val mm = mock[JavaClassExtended] // should be used instead

Java generics without provided type params

You can’t stub such interfaces without workaround

public interface Foo {
    void route(java.util.Map map);
}


trait ScalaFoo extends Foo {
  override def route(map: java.util.Map[_, _]): Unit
}
val m = stub[ScalaFoo]