How does curly braces following trait instantiation work?

Question

I find some confusing use of trait in some unittesting code, such as:

trait MyTrait {
  val t1 = ... //some expression
  val t2 = ... //some expression
}
         


        

Answer 1

val t = new MyTrait {
  val t1 = ... //some expression
  val t2 = ... //some expression
}

is the same as

val t = new AnyRef with MyTrait {
  val t1 = ... //some expression
  val t2 = ... //some expression
}

is the same as

val t = new Object with MyTrait {
  val t1 = ... //some expression
  val t2 = ... //some expression
}