1 files changed, 89 insertions, 3 deletions
diff --git a/gnu/tests.scm b/gnu/tests.scm
index 08d8315ea0..ea779ed6f0 100644
--- a/gnu/tests.scm
+++ b/gnu/tests.scm
@@ -18,11 +18,28 @@
 
 (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)
-  #:export (backdoor-service-type
-            marionette-operating-system))
+  #: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:
 ;;;
@@ -112,7 +129,7 @@
 (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 marionette.
+  ;; universal backdoor.
   (service-type (name 'marionette-repl)
                 (extensions
                  (list (service-extension shepherd-root-service-type
@@ -127,4 +144,73 @@ in a virtual machine--i.e., controlled from the host system."
     (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