+;;; Set *default-pathname-defaults* to something other than the unix
+;;; cwd, to catch functions which access the filesystem without
+;;; merging properly. We should test more functions than just OPEN
+;;; here, of course
+
+(let ((*default-pathname-defaults*
+ (make-pathname :directory
+ (butlast
+ (pathname-directory *default-pathname-defaults*))
+ :defaults *default-pathname-defaults*)))
+ ;; SBCL 0.7.1.2 failed to merge on OPEN
+ (with-open-file (i "tests/filesys.pure.lisp")
+ (assert i)))
+
+;;; OPEN, LOAD and friends should signal an error of type FILE-ERROR
+;;; if they are fed wild pathname designators; firstly, with wild
+;;; pathnames that don't correspond to any files:
+(assert (typep (nth-value 1 (ignore-errors (open "non-existent*.lisp")))
+ 'file-error))
+(assert (typep (nth-value 1 (ignore-errors (load "non-existent*.lisp")))
+ 'file-error))
+;;; then for pathnames that correspond to precisely one:
+(assert (typep (nth-value 1 (ignore-errors (open "filesys.pur*.lisp")))
+ 'file-error))
+(assert (typep (nth-value 1 (ignore-errors (load "filesys.pur*.lisp")))
+ 'file-error))
+;;; then for pathnames corresponding to many:
+(assert (typep (nth-value 1 (ignore-errors (open "*.lisp")))
+ 'file-error))
+(assert (typep (nth-value 1 (ignore-errors (load "*.lisp")))
+ 'file-error))
+