module Test

  use int.Int
  use list.List
  use stack.Stack

  let test0 () =
    let s = Stack.create () : Stack.t 'a in
    assert { s.elts = Nil };
    let b = Stack.is_empty s in
    assert { b = True };
    let n = Stack.length s in
    assert { n = 0 }

  let test1 () raises { Empty }
  = let s = Stack.create () in
    Stack.push 1 s;
    let x = Stack.top s in assert { x = 1 };
    Stack.push 2 s;
    let x = Stack.top s in assert { x = 2 };
    ()

end