test_stack.ml

(**************************************************************************)
(* The OUnit library                                                      *)
(*                                                                        *)
(* Copyright (C) 2002-2008 Maas-Maarten Zeeman.                           *)
(* Copyright (C) 2010 OCamlCore SARL                                      *)
(* Copyright (C) 2013 Sylvain Le Gall                                     *)
(*                                                                        *)
(* The package OUnit is copyright by Maas-Maarten Zeeman, OCamlCore SARL  *)
(* and Sylvain Le Gall.                                                   *)
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(* See LICENSE.txt for details.                                           *)
(**************************************************************************)

open OUnit2

(*
 * This test shows how brackets can be used. They are handy to create
 * a so called fixture, which can be used for multiple tests
 *)

(* prepare a stack for test *)
let setup _test_ctxt =
  let s = Stack.create () in
  Stack.push 1 s;
  Stack.push 2 s;
  Stack.push 3 s;
  s

let teardown _stack _test_ctxt =
  ()

let test_top stack =
  assert_equal 3 (Stack.top stack)

let test_clear stack =
  Stack.clear stack;
  assert_raises
    Stack.Empty
    (fun _ -> 
       let _i = Stack.top stack in
       ())

let test_pop stack =
  assert_equal 3 (Stack.pop stack);
  assert_equal 2 (Stack.pop stack);
  assert_equal 1 (Stack.pop stack);
  assert_raises
    Stack.Empty
    (fun _ -> let _i : int = Stack.pop stack in ())

let suite =
  "Test Stack" >::: [
    "test_top" >::
    (fun test_ctxt ->
       let stack = bracket setup teardown test_ctxt in
       test_top stack);

    "test_clear" >::
    (fun test_ctxt ->
       let stack = bracket setup teardown test_ctxt in
       test_clear stack);

    "test_pop" >::
    (fun test_ctxt ->
       let stack = bracket setup teardown test_ctxt in
       test_pop stack)
  ]

let () =
  run_test_tt_main suite