;;; Copyright (C) Peter McGoron 2024
;;; This program is free software: you can redistribute it and/or modify
;;; it under the terms of the GNU General Public License as published by
;;; the Free Software Foundation, version 3 of the License.
;;; 
;;; This program is distributed in the hope that it will be useful,
;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;; GNU General Public License for more details.
;;; 
;;; You should have received a copy of the GNU General Public License
;;; along with this program.  If not, see <https://www.gnu.org/licenses/>.

;;; Test harness.
;;; Each test is a name and a function with no arguments. The function
;;; returns #t for success, #f for undefined failure, and a string for
;;; known failure.
;;; 
;;; TODO: Return test results as a list.

(define verbose? #t)

(define run-tests
  (lambda (tests)
    (letrec
        ((run-test
          (lambda (name test)
            (if verbose?
                (begin
                  (display "running: ")
                  (display name)
                  (newline))
                #f)
            (let ((result (test)))
              (if (not result)
                  "undefined failure"
                  result))))
         (loop
          (lambda (rest)
            (if (null? rest)
                #t
                (let ((descr (car rest)))
                  (let ((return (run-test
                                 (car descr)
                                 (cdr descr))))
                    (if (not (eq? return #t))
                        return
                        (loop (cdr rest)))))))))
      (loop tests))))

(define report-tests
  (lambda (tests)
    (let ((res (run-tests tests)))
      (if (eq? res #t)
          (display "passed")
          (begin
            (display "failed: ")
            (display res))))
    (newline)))

(load "doubly-linked-list.scm")
(display "running doubly linked list tests: ")
(newline)
(report-tests %dl:tests)

(load "set.scm")
(display "running string BST-AVL tests")
(newline)
(report-tests %set:tests)