guix/gnu/tests.scm
Ludovic Courtès 98b65b5ff6
tests: Add a mechanism to describe and discover system tests.
* gnu/tests.scm (<system-test>): New record type.
(write-system-test, test-modules, fold-system-tests)
(all-system-tests): New procedures.
* gnu/tests/base.scm (%test-basic-os): Turn into a <system-test>.
* gnu/tests/install.scm (%test-installed-os): Likewise.
* build-aux/run-system-tests.scm (%system-tests): Remove.
(run-system-tests): Use 'all-system-tests'.
2016-06-20 23:50:46 +02:00

217 lines
8.1 KiB
Scheme
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2016 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix 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; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix 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 GNU Guix. If not, see <http://www.gnu.org/licenses/>.
(define-module (gnu tests)
#:use-module (guix gexp)
#:use-module (guix utils)
#:use-module (guix records)
#:use-module (gnu system)
#:use-module (gnu services)
#:use-module (gnu services shepherd)
#:use-module ((gnu packages) #:select (scheme-modules))
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-9 gnu)
#:use-module (ice-9 match)
#:export (marionette-service-type
marionette-operating-system
define-os-with-source
system-test
system-test?
system-test-name
system-test-value
system-test-description
system-test-location
fold-system-tests
all-system-tests))
;;; Commentary:
;;;
;;; This module provides the infrastructure to run operating system tests.
;;; The most important part of that is tools to instrument the OS under test,
;;; essentially allowing to run in a virtual machine controlled by the host
;;; system--hence the name "marionette".
;;;
;;; Code:
(define (marionette-shepherd-service imported-modules)
"Return the Shepherd service for the marionette REPL"
(define device
"/dev/hvc0")
(list (shepherd-service
(provision '(marionette))
(requirement '(udev)) ;so that DEVICE is available
(modules '((ice-9 match)
(srfi srfi-9 gnu)
(guix build syscalls)
(rnrs bytevectors)))
(imported-modules `((guix build syscalls)
,@imported-modules))
(start
#~(lambda ()
(define (clear-echo termios)
(set-field termios (termios-local-flags)
(logand (lognot (local-flags ECHO))
(termios-local-flags termios))))
(define (self-quoting? x)
(letrec-syntax ((one-of (syntax-rules ()
((_) #f)
((_ pred rest ...)
(or (pred x)
(one-of rest ...))))))
(one-of symbol? string? pair? null? vector?
bytevector? number? boolean?)))
(match (primitive-fork)
(0
(dynamic-wind
(const #t)
(lambda ()
(let* ((repl (open-file #$device "r+0"))
(termios (tcgetattr (fileno repl)))
(console (open-file "/dev/console" "r+0")))
;; Don't echo input back.
(tcsetattr (fileno repl) (tcsetattr-action TCSANOW)
(clear-echo termios))
;; Redirect output to the console.
(close-fdes 1)
(close-fdes 2)
(dup2 (fileno console) 1)
(dup2 (fileno console) 2)
(close-port console)
(display 'ready repl)
(let loop ()
(newline repl)
(match (read repl)
((? eof-object?)
(primitive-exit 0))
(expr
(catch #t
(lambda ()
(let ((result (primitive-eval expr)))
(write (if (self-quoting? result)
result
(object->string result))
repl)))
(lambda (key . args)
(print-exception (current-error-port)
(stack-ref (make-stack #t) 1)
key args)
(write #f repl)))))
(loop))))
(lambda ()
(primitive-exit 1))))
(pid
pid))))
(stop #~(make-kill-destructor)))))
(define marionette-service-type
;; This is the type of the "marionette" service, allowing a guest system to
;; be manipulated from the host. This marionette REPL is essentially a
;; universal backdoor.
(service-type (name 'marionette-repl)
(extensions
(list (service-extension shepherd-root-service-type
marionette-shepherd-service)))))
(define* (marionette-operating-system os
#:key (imported-modules '()))
"Return a marionetteed variant of OS such that OS can be used as a marionette
in a virtual machine--i.e., controlled from the host system."
(operating-system
(inherit os)
(services (cons (service marionette-service-type imported-modules)
(operating-system-user-services os)))))
(define-syntax define-os-with-source
(syntax-rules (use-modules operating-system)
"Define two variables: OS containing the given operating system, and
SOURCE containing the source to define OS as an sexp.
This is convenient when we need both the <operating-system> object so we can
instantiate it, and the source to create it so we can store in in a file in
the system under test."
((_ (os source)
(use-modules modules ...)
(operating-system fields ...))
(begin
(define os
(operating-system fields ...))
(define source
'(begin
(use-modules modules ...)
(operating-system fields ...)))))))
;;;
;;; Tests.
;;;
(define-record-type* <system-test> system-test make-system-test
system-test?
(name system-test-name) ;string
(value system-test-value) ;%STORE-MONAD value
(description system-test-description) ;string
(location system-test-location (innate) ;<location>
(default (and=> (current-source-location)
source-properties->location))))
(define (write-system-test test port)
(match test
(($ <system-test> name _ _ ($ <location> file line))
(format port "#<system-test ~a ~a:~a ~a>"
name file line
(number->string (object-address test) 16)))
(($ <system-test> name)
(format port "#<system-test ~a ~a>" name
(number->string (object-address test) 16)))))
(set-record-type-printer! <system-test> write-system-test)
(define (test-modules)
"Return the list of modules that define system tests."
(scheme-modules (dirname (search-path %load-path "guix.scm"))
"gnu/tests"))
(define (fold-system-tests proc seed)
"Invoke PROC on each system test, passing it the test and the previous
result."
(fold (lambda (module result)
(fold (lambda (thing result)
(if (system-test? thing)
(proc thing result)
result))
result
(module-map (lambda (sym var)
(false-if-exception (variable-ref var)))
module)))
'()
(test-modules)))
(define (all-system-tests)
"Return the list of system tests."
(reverse (fold-system-tests cons '())))
;;; tests.scm ends here