Fix vc-git test when no identities are configured

Reported by john muhl <jm@pub.pink>.

* test/lisp/vc/vc-git-tests.el (vc-git-test--with-repo): Set
some environment variables (lifted from vc-tests.el) to let
'git commit' compute dummy author and committer identities.

1 files changed, 9 insertions, 2 deletions

diff --git a/test/lisp/vc/vc-git-tests.el b/test/lisp/vc/vc-git-tests.el
index fd3e8ccd602..bbf0c4277dd 100644
--- a/test/lisp/vc/vc-git-tests.el
+++ b/test/lisp/vc/vc-git-tests.el
@@ -88,10 +88,17 @@
 
 The current directory will be set to the top of that repository; NAME
 will be bound to that directory's file name.  Once BODY exits, the
-directory will be deleted."
+directory will be deleted.
+
+Some dummy environment variables will be set for the duration of BODY to
+allow 'git commit' to determine identities for authors and committers."
   (declare (indent 1))
   `(ert-with-temp-directory ,name
-     (let ((default-directory ,name))
+     (let ((default-directory ,name)
+           (process-environment (append '("EMAIL=john@doe.ee"
+                                          "GIT_AUTHOR_NAME=A"
+                                          "GIT_COMMITTER_NAME=C")
+                                        process-environment)))
        (vc-create-repo 'Git)
        ,@body)))