ERT can generate JUnit test reports

* .gitignore: Add test/**/*.xml.

* admin/notes/emba: Mention JUnit test report.

* etc/NEWS: ERT can generate JUnit test reports.

* lisp/emacs-lisp/ert.el (xml-escape-string): Autoload.
(ert-write-junit-test-report)
(ert-write-junit-test-summary-report): New defuns.
(ert-run-tests-batch, ert-summarize-tests-batch-and-exit): Call them.

* test/Makefile.in (clean): Remove *.xml.

* test/README: Mention $EMACS_TEST_JUNIT_REPORT environment variable.

* test/infra/Makefile.in ($(FILE)): Generate header commentary.
(clean): Remove.

* test/infra/gitlab-ci.yml (variables): Set EMACS_TEST_JUNIT_REPORT.
(.job-template): Use it in script and after_script.
(.build-template, .gnustep-template, .filenotify-gio-template)
(.native-comp-template): Adapt rules.
(.test-template): Trigger JUnit test report.

* test/infra/test-jobs.yml: Regenerate.

1 files changed, 7 insertions, 0 deletions

diff --git a/etc/NEWS b/etc/NEWS
index b55b30665be..8d83b2a7e36 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -163,6 +163,12 @@ the previous definition to be discarded, which was probably not
 intended when this occurs in batch mode.  To remedy the error, rename
 tests so that they all have unique names.
 
++++
+*** ERT can generate JUnit test reports.
+When environment variable 'EMACS_TEST_JUNIT_REPORT' is set, ERT
+generates a JUnit test report under this file name.  This is useful
+for Emacs integration into CI/CD test environments.
+
 ** Emoji
 
 +++
@@ -1143,6 +1149,7 @@ This variable is bound to t during the preparation of a "*Help*" buffer.
 ** 'date-to-time' now assumes earliest values if its argument lacks
 month, day, or time.  For example, (date-to-time "2021-12-04") now
 assumes a time of 00:00 instead of signaling an error.
+
 
 * Changes in Emacs 29.1 on Non-Free Operating Systems