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;;; Guile-Git --- GNU Guile bindings of libgit2
;;; Copyright © 2025 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of Guile-Git.
;;;
;;; Guile-Git 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.
;;;
;;; Guile-Git 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 Guile-Git. If not, see <http://www.gnu.org/licenses/>.
(define-module (tests graph)
#:use-module (git)
#:use-module (git structs)
#:use-module (tests helpers)
#:use-module (srfi srfi-64)
#:use-module (rnrs bytevectors)
#:use-module (rnrs io ports)
#:use-module (ice-9 match))
(test-begin "graph")
(with-repository "simple" directory
(test-equal "graph-ahead-behind"
'((0 1) ;1 behind
(1 0)) ;1 ahead
(let* ((repository (repository-open directory))
(head (reference-target (repository-head repository)))
(parent (car (commit-parents (commit-lookup repository head)))))
(list (call-with-values
(lambda () (graph-ahead-behind repository
(commit-id parent)
head))
list)
(call-with-values
(lambda () (graph-ahead-behind repository
head
(commit-id parent)))
list))))
(test-equal "graph-ahead-behind, unknown OID"
'git-error
(let* ((repository (repository-open directory))
(head (reference-target (repository-head repository)))
(oid (string->oid "0000000000000000000000000000000000000042")))
(catch 'git-error
(lambda ()
(graph-ahead-behind repository oid head))
(lambda (key error . _)
;; The exact error code we should get is unspecified.
(pk 'error error key)))))
(test-assert "graph-descendant?"
(let* ((repository (repository-open directory))
(head (reference-target (repository-head repository)))
(parent (car (commit-parents (commit-lookup repository head)))))
(and (not (graph-descendant? repository head head))
(let loop ((commit (commit-lookup repository head)))
(match (commit-parents commit)
(()
#t)
((parent)
(pk 'descendant? head (commit-id parent))
(and (graph-descendant? repository
head (commit-id parent))
(not (graph-descendant? repository
(commit-id parent) head))
(loop parent))))))))
(test-equal "graph-descendant?, unknown OID"
'git-error
(let* ((repository (repository-open directory))
(head (reference-target (repository-head repository)))
(oid (string->oid "0000000000000000000000000000000000000042")))
(catch 'git-error
(lambda ()
(graph-descendant? repository head oid))
(lambda (key error . _)
;; The exact error code we should get is unspecified.
(pk 'error error key))))))
(test-end)
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