(define-module (webid-oidc testing)
  #:use-module (webid-oidc stubs)
  #:use-module (webid-oidc errors))

;; This module is used only when running tests.

(define-public (with-test-environment test-name f)
  (let ((cache-dir (format #f "tests/~a.cache" test-name))
        (data-dir (format #f "tests/~a.home" test-name)))
    (setenv "XDG_CACHE_HOME" cache-dir)
    (setenv "XDG_DATA_HOME" data-dir)
    (catch #t
      (lambda () (mkdir cache-dir))
      (lambda err #t))
    (let ((pkg-cache-dir (format #f "~a/webid-oidc" cache-dir)))
      (catch #t
        (lambda () (mkdir pkg-cache-dir))
        (lambda err #t))
      (let ((seed-file-name (format #f "~a/seed" pkg-cache-dir)))
        (with-output-to-file seed-file-name
          (lambda ()
            (format #t "This is the initial seed for the random number generator"))))))
  (with-exception-handler
      (lambda (error)
        (format (current-error-port) "The test failed, because ~a.\n"
                (error->str error))
        (raise-exception error))
    (lambda ()
      (random-init!)
      (f))))