(defun run-unit-test (unit-test)
  (if (call unit-test)
    (begin
      (print (cons t unit-test))
      t)
    (begin
      (print (cons 'f unit-test))
      nil)))

(defun run-test-suite (test-suite)
  (if test-suite
    (cons
      (run-unit-test (car test-suite))
      (run-test-suite (cdr test-suite)))))

(defun unit (test-suite)
  (apply 'and (run-test-suite test-suite)))

(defun assert (comparison operand1 operand2)
  (if (call comparison operand1 operand2)
    t
    (begin
      (print '==================================================)
      (print (list comparison 'comparison 'failed))
      (print operand1)
      (print operand2)
      (print '--------------------------------------------------)
      nil)))

(defun assert= (expected actual)
  (assert '= expected actual))

(defun assert-equal (expected actual)
  (assert 'equal expected actual))