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guix/tests/records.scm
Ludovic Courtès 7c1161dba4
records: 'match-record' checks fields at macro-expansion time. 
This allows 'match-record' to be more efficient (field offsets are
computed at compilation time) and to report unknown fields at
macro-expansion time.

* guix/records.scm (map-fields): New macro.
(define-record-type*)[rtd-identifier]: New procedure.
Define TYPE as a macro and use a separate identifier for the RTD.
(lookup-field, match-record-inner): New macros.
(match-record): Rewrite in terms of 'match-error-inner'.
* tests/records.scm ("match-record, simple")
("match-record, unknown field"): New tests.
* gnu/services/cuirass.scm (cuirass-shepherd-service): Rename 'log-file'
local variable to 'main-log-file'.
* gnu/services/getmail.scm (serialize-getmail-configuration-file): Move
after <getmail-configuration-file> definition.
2022-12-02 00:02:12 +01:00

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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2012-2016, 2018-2022 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 (test-records)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-64)
#:use-module (ice-9 match)
#:use-module (ice-9 regex)
#:use-module (guix records))
(define (test-module)
;; A module in which to evaluate things that are known to fail.
(let ((module (make-fresh-user-module)))
(module-use! module (resolve-interface '(guix records)))
module))
(define (location-alist loc)
;; Return a location alist. In Guile < 3.0.6, LOC is always an alist, but
;; starting with 3.0.6, LOC is a vector (at least when it comes from
;; 'syntax-error' exceptions), hence this conversion.
(match loc
(#(file line column)
`((line . ,line) (column . ,column)
(filename . ,file)))
(_ loc)))
(test-begin "records")
(test-assert "define-record-type*"
(begin
(define-record-type* <foo> foo make-foo
foo?
(bar foo-bar)
(baz foo-baz (default (+ 40 2))))
(and (match (foo (bar 1) (baz 2))
(($ <foo> 1 2) #t))
(match (foo (baz 2) (bar 1))
(($ <foo> 1 2) #t))
(match (foo (bar 1))
(($ <foo> 1 42) #t)))))
(test-assert "define-record-type* with let* behavior"
;; Make sure field initializers can refer to each other as if they were in
;; a 'let*'.
(begin
(define-record-type* <bar> bar make-bar
foo?
(x bar-x)
(y bar-y (default (+ 40 2)))
(z bar-z))
(and (match (bar (x 1) (y (+ x 1)) (z (* y 2)))
(($ <bar> 1 2 4) #t))
(match (bar (x 7) (z (* x 3)))
(($ <bar> 7 42 21) #t))
(match (bar (z 21) (x (/ z 3)))
(($ <bar> 7 42 21) #t)))))
(test-assert "define-record-type* & inherit"
(begin
(define-record-type* <foo> foo make-foo
foo?
(bar foo-bar)
(baz foo-baz (default (+ 40 2))))
(let* ((a (foo (bar 1)))
(b (foo (inherit a) (baz 2)))
(c (foo (inherit b) (bar -2)))
(d (foo (inherit c)))
(e (foo (inherit (foo (bar 42))) (baz 77))))
(and (match a (($ <foo> 1 42) #t))
(match b (($ <foo> 1 2) #t))
(match c (($ <foo> -2 2) #t))
(equal? c d)
(match e (($ <foo> 42 77) #t))))))
(test-assert "define-record-type* & inherit & let* behavior"
(begin
(define-record-type* <foo> foo make-foo
foo?
(bar foo-bar)
(baz foo-baz (default (+ 40 2))))
(let* ((a (foo (bar 77)))
(b (foo (inherit a) (bar 1) (baz (+ bar 1))))
(c (foo (inherit b) (baz 2) (bar (- baz 1)))))
(and (match a (($ <foo> 77 42) #t))
(match b (($ <foo> 1 2) #t))
(equal? b c)))))
(test-assert "define-record-type* & inherit & innate"
(begin
(define-record-type* <foo> foo make-foo
foo?
(bar foo-bar (innate) (default 42)))
(let* ((a (foo (bar 1)))
(b (foo (inherit a)))
(c (foo (inherit a) (bar 3)))
(d (foo)))
(and (match a (($ <foo> 1) #t))
(match b (($ <foo> 42) #t))
(match c (($ <foo> 3) #t))
(match d (($ <foo> 42) #t))))))
(test-assert "define-record-type* & thunked"
(begin
(define-record-type* <foo> foo make-foo
foo?
(bar foo-bar)
(baz foo-baz (thunked)))
(let* ((calls 0)
(x (foo (bar 2)
(baz (begin (set! calls (1+ calls)) 3)))))
(and (zero? calls)
(equal? (foo-bar x) 2)
(equal? (foo-baz x) 3) (= 1 calls)
(equal? (foo-baz x) 3) (= 2 calls)))))
(test-assert "define-record-type* & thunked & default"
(begin
(define-record-type* <foo> foo make-foo
foo?
(bar foo-bar)
(baz foo-baz (thunked) (default 42)))
(let ((mark (make-parameter #f)))
(let ((x (foo (bar 2) (baz (mark))))
(y (foo (bar 2))))
(and (equal? (foo-bar x) 2)
(parameterize ((mark (cons 'a 'b)))
(eq? (foo-baz x) (mark)))
(equal? (foo-bar y) 2)
(equal? (foo-baz y) 42))))))
(test-assert "define-record-type* & thunked & inherited"
(begin
(define-record-type* <foo> foo make-foo
foo?
(bar foo-bar (thunked))
(baz foo-baz (thunked) (default 42)))
(let ((mark (make-parameter #f)))
(let* ((x (foo (bar 2) (baz (mark))))
(y (foo (inherit x) (bar (mark)))))
(and (equal? (foo-bar x) 2)
(parameterize ((mark (cons 'a 'b)))
(eq? (foo-baz x) (mark)))
(parameterize ((mark (cons 'a 'b)))
(eq? (foo-bar y) (mark)))
(parameterize ((mark (cons 'a 'b)))
(eq? (foo-baz y) (mark))))))))
(test-assert "define-record-type* & thunked & innate"
(let ((mark (make-parameter #f)))
(define-record-type* <foo> foo make-foo
foo?
(bar foo-bar (thunked) (innate) (default (mark)))
(baz foo-baz (default #f)))
(let* ((x (foo (bar 42)))
(y (foo (inherit x) (baz 'unused))))
(and (procedure? (struct-ref x 0))
(equal? (foo-bar x) 42)
(parameterize ((mark (cons 'a 'b)))
(eq? (foo-bar y) (mark)))
(parameterize ((mark (cons 'a 'b)))
(eq? (foo-bar y) (mark)))))))
(test-assert "define-record-type* & thunked & this-record"
(begin
(define-record-type* <foo> foo make-foo
foo?
(bar foo-bar)
(baz foo-baz (thunked)))
(let ((x (foo (bar 40)
(baz (+ (foo-bar this-record) 2)))))
(and (= 40 (foo-bar x))
(= 42 (foo-baz x))))))
(test-assert "define-record-type* & thunked & default & this-record"
(begin
(define-record-type* <foo> foo make-foo
foo?
(bar foo-bar)
(baz foo-baz (thunked)
(default (+ (foo-bar this-record) 2))))
(let ((x (foo (bar 40))))
(and (= 40 (foo-bar x))
(= 42 (foo-baz x))))))
(test-assert "define-record-type* & thunked & inherit & this-record"
(begin
(define-record-type* <foo> foo make-foo
foo?
(bar foo-bar)
(baz foo-baz (thunked)
(default (+ (foo-bar this-record) 2))))
(let* ((x (foo (bar 40)))
(y (foo (inherit x) (bar -2)))
(z (foo (inherit x) (baz -2))))
(and (= -2 (foo-bar y))
(= 0 (foo-baz y))
(= 40 (foo-bar z))
(= -2 (foo-baz z))))))
(test-assert "define-record-type* & thunked & inherit & custom this"
(let ()
(define-record-type* <foo> foo make-foo
foo? this-foo
(thing foo-thing (thunked)))
(define-record-type* <bar> bar make-bar
bar? this-bar
(baz bar-baz (thunked)))
;; Nest records and test the two self references.
(let* ((x (foo (thing (bar (baz (list this-bar this-foo))))))
(y (foo-thing x)))
(match (bar-baz y)
((first second)
(and (eq? second x)
(bar? first)
(eq? first y)))))))
(test-assert "define-record-type* & delayed"
(begin
(define-record-type* <foo> foo make-foo
foo?
(bar foo-bar (delayed)))
(let* ((calls 0)
(x (foo (bar (begin (set! calls (1+ calls)) 3)))))
(and (zero? calls)
(equal? (foo-bar x) 3) (= 1 calls)
(equal? (foo-bar x) 3) (= 1 calls)
(equal? (foo-bar x) 3) (= 1 calls)))))
(test-assert "define-record-type* & delayed & default"
(let ((mark #f))
(define-record-type* <foo> foo make-foo
foo?
(bar foo-bar (delayed) (default mark)))
(let ((x (foo)))
(set! mark 42)
(and (equal? (foo-bar x) 42)
(begin
(set! mark 7)
(equal? (foo-bar x) 42))))))
(test-assert "define-record-type* & delayed & inherited"
(begin
(define-record-type* <foo> foo make-foo
foo?
(bar foo-bar (delayed))
(baz foo-baz (delayed)))
(let* ((m 1)
(n #f)
(x (foo (bar m) (baz n)))
(y (foo (inherit x) (baz 'b))))
(set! n 'a)
(and (equal? (foo-bar x) 1)
(eq? (foo-baz x) 'a)
(begin
(set! m 777)
(equal? (foo-bar y) 1)) ;promise was already forced
(eq? (foo-baz y) 'b)))))
(test-assert "define-record-type* & sanitize"
(begin
(define-record-type* <foo> foo make-foo
foo?
(bar foo-bar
(default "bar")
(sanitize (lambda (x) (string-append x "!")))))
(let* ((p (foo))
(q (foo (inherit p)))
(r (foo (inherit p) (bar "baz")))
(s (foo (bar "baz"))))
(and (string=? (foo-bar p) "bar!")
(equal? q p)
(string=? (foo-bar r) "baz!")
(equal? s r)))))
(test-equal "define-record-type* & sanitize without default value"
42
(begin
(define-record-type* <foo> foo make-foo
foo?
(bar foo-bar (sanitize 1+)))
(foo-bar (foo (bar 41)))))
(test-assert "define-record-type* & sanitize & thunked"
(let ((sanitized 0))
(define-record-type* <foo> foo make-foo
foo?
(bar foo-bar
(default "bar")
(sanitize (lambda (x)
(set! sanitized (+ 1 sanitized))
(string-append x "!")))))
(let ((p (foo)))
(and (string=? (foo-bar p) "bar!")
(string=? (foo-bar p) "bar!") ;twice
(= sanitized 1) ;sanitizer was called at init time only
(let ((q (foo (bar "baz"))))
(and (string=? (foo-bar q) "baz!")
(string=? (foo-bar q) "baz!") ;twice
(= sanitized 2)
(let ((r (foo (inherit q))))
(and (string=? (foo-bar r) "baz!")
(= sanitized 2))))))))) ;no re-sanitization
(test-assert "define-record-type* & wrong field specifier"
(let ((exp '(begin
(define-record-type* <foo> foo make-foo
foo?
(bar foo-bar (default 42))
(baz foo-baz))
(foo (baz 1 2 3 4 5)))) ;syntax error
(loc (current-source-location))) ;keep this alignment!
(catch 'syntax-error
(lambda ()
(eval exp (test-module))
#f)
(lambda (key proc message location form subform . _)
(and (eq? proc 'foo)
(string-match "invalid field" message)
(equal? subform '(baz 1 2 3 4 5))
(equal? form '(foo (baz 1 2 3 4 5)))
;; Make sure the location is that of the field specifier.
;; See <http://bugs.gnu.org/23969>.
(lset= equal?
(pk 'expected-loc
`((line . ,(- (assq-ref loc 'line) 1))
,@(alist-delete 'line loc)))
(pk 'actual-loc (location-alist location))))))))
(test-assert "define-record-type* & wrong field specifier, identifier"
(let ((exp '(begin
(define-record-type* <foo> foo make-foo
foo?
(bar foo-bar (default 42))
(baz foo-baz))
(foo
baz))) ;syntax error
(loc (current-source-location))) ;keep this alignment!
(catch 'syntax-error
(lambda ()
(eval exp (test-module))
#f)
(lambda (key proc message location form subform . _)
(and (eq? proc 'foo)
(string-match "invalid field" message)
(equal? subform 'baz)
(equal? form '(foo baz))
;; Here the location is that of the parent form.
(lset= equal?
(pk 'expected-loc
`((line . ,(- (assq-ref loc 'line) 2))
,@(alist-delete 'line loc)))
(pk 'actual-loc (location-alist location))))))))
(test-assert "define-record-type* & missing initializers"
(catch 'syntax-error
(lambda ()
(eval '(begin
(define-record-type* <foo> foo make-foo
foo?
(bar foo-bar (default 42))
(baz foo-baz))
(foo))
(test-module))
#f)
(lambda (key proc message location form . args)
(and (eq? proc 'foo)
(string-match "missing .*initialize.*baz" message)
(equal? form '(foo))))))
(test-assert "define-record-type* & extra initializers"
(catch 'syntax-error
(lambda ()
(eval '(begin
(define-record-type* <foo> foo make-foo
foo?
(bar foo-bar (default 42)))
(foo (baz 'what?)))
(test-module))
#f)
(lambda (key proc message location form . args)
(and (string-match "extra.*initializer.*baz" message)
(eq? proc 'foo)))))
(test-assert "define-record-type* & inherit & extra initializers"
(catch 'syntax-error
(lambda ()
(eval '(begin
(define-record-type* <foo> foo make-foo
foo?
(bar foo-bar (default 42)))
(foo (inherit (foo)) (baz 'what?)))
(test-module))
#f)
(lambda (key proc message location form . args)
(and (string-match "extra.*initializer.*baz" message)
(eq? proc 'foo)))))
(test-assert "define-record-type* & duplicate initializers"
(let ((exp '(begin
(define-record-type* <foo> foo make-foo
foo?
(bar foo-bar (default 42)))
(foo (bar 1)
(bar 2))))
(loc (current-source-location))) ;keep this alignment!
(catch 'syntax-error
(lambda ()
(eval exp (test-module))
#f)
(lambda (key proc message location form . args)
(and (string-match "duplicate.*initializer" message)
(eq? proc 'foo)
;; Make sure the location is that of the field specifier.
(lset= equal?
(pk 'expected-loc
`((line . ,(- (assq-ref loc 'line) 1))
,@(alist-delete 'line loc)))
(pk 'actual-loc (location-alist location))))))))
(test-assert "ABI checks"
(let ((module (test-module)))
(eval '(begin
(define-record-type* <foo> foo make-foo
foo?
(bar foo-bar (default 42)))
(define (make-me-a-record) (foo)))
module)
(unless (eval '(foo? (make-me-a-record)) module)
(error "what?" (eval '(make-me-a-record) module)))
;; Redefine <foo> with an additional field.
(eval '(define-record-type* <foo> foo make-foo
foo?
(baz foo-baz)
(bar foo-bar (default 42)))
module)
;; Now 'make-me-a-record' is out of sync because it does an
;; 'allocate-struct' that corresponds to the previous definition of <foo>.
(catch 'record-abi-mismatch-error
(lambda ()
(eval '(foo? (make-me-a-record)) module)
#f)
(match-lambda*
((key 'abi-check (? string? message) (rtd) . _)
(eq? rtd (eval '<foo> module)))))))
(test-equal "recutils->alist"
'((("Name" . "foo")
("Version" . "0.1")
("Synopsis" . "foo bar")
("Something_else" . "chbouib"))
(("Name" . "bar")
("Version" . "1.5")))
(let ((p (open-input-string "
# Comment following an empty line, and
# preceding a couple of empty lines, all of
# which should be silently consumed.
Name: foo
Version: 0.1
# Comment right in the middle,
# spanning two lines.
Synopsis: foo bar
Something_else: chbouib
# Comment right before.
Name: bar
Version: 1.5
# Comment at the end.")))
(list (recutils->alist p)
(recutils->alist p))))
(test-equal "recutils->alist with + lines"
'(("Name" . "foo")
("Description" . "1st line,\n2nd line,\n 3rd line with extra space,\n4th line without space."))
(recutils->alist (open-input-string "
Name: foo
Description: 1st line,
+ 2nd line,
+ 3rd line with extra space,
+4th line without space.")))
(test-equal "alist->record" '((1 2) b c)
(alist->record '(("a" . 1) ("b" . b) ("c" . c) ("a" . 2))
list
'("a" "b" "c")
'("a")))
(test-equal "match-record, simple"
'((1 2) (a b))
(let ()
(define-record-type* <foo> foo make-foo
foo?
(first foo-first (default 1))
(second foo-second))
(list (match-record (foo (second 2)) <foo>
(first second)
(list first second))
(match-record (foo (first 'a) (second 'b)) <foo>
(second first)
(list first second)))))
(test-equal "match-record, unknown field"
'syntax-error
(catch 'syntax-error
(lambda ()
(eval '(begin
(use-modules (guix records))
(define-record-type* <foo> foo make-foo
foo?
(first foo-first (default 1))
(second foo-second))
(match-record (foo (second 2)) <foo>
(one two)
#f))
(make-fresh-user-module)))
(lambda (key . args) key)))
(test-end)
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