test(config-utilities): cover with-timer, compile-buffer, summary, info commands

Four new test files extending the existing coverage of
cj/emacs-build--format-build-time. The interactive heavyweights
(cj/recompile-emacs-home, cj/delete-emacs-home-compiled-files,
cj/benchmark-this-method, cj/validate-org-agenda-timestamps) are out
of scope for this pass — each needs an internal/wrapper split first
before tests can exercise the logic without UI.

- with-timer macro: 4 tests asserting it returns the FORMS' value,
  evaluates the body exactly once, emits both announce and done
  messages, and returns the last form when given multiple.
- cj/compile-this-elisp-buffer: 6 tests dispatching across native-async,
  native-sync, and byte-compile fallbacks, plus the not-elisp /
  no-buffer-file-name error paths and the sync-native error catch.
- cj/emacs-build--summary-string: 5 tests asserting the shape of the
  multi-line report (Version, System, Build date, Capabilities section,
  yes/no flag rendering) without locking exact wording.
- info-commands smoke: 5 tests exercising cj/info-emacs-build,
  cj/info-loaded-packages, cj/info-loaded-features, cj/reload-init-file,
  and cj/org-alert-list-timers via boundary-mocked pop-to-buffer and
  load-file, asserting buffer creation, content shape, or echo-area
  message as appropriate.

20 new tests, all passing. Full suite green.

1 files changed, 83 insertions, 0 deletions

diff --git a/tests/test-config-utilities--info-commands-smoke.el b/tests/test-config-utilities--info-commands-smoke.el
new file mode 100644
index 00000000..f28ec712
--- /dev/null
+++ b/tests/test-config-utilities--info-commands-smoke.el
@@ -0,0 +1,83 @@
+;;; test-config-utilities--info-commands-smoke.el --- Smoke tests for the cj/info-* family + reload-init-file -*- lexical-binding: t; -*-
+
+;;; Commentary:
+;; Smoke tests for the simple interactive commands in config-utilities.el:
+;; cj/info-emacs-build, cj/info-loaded-packages, cj/info-loaded-features,
+;; cj/reload-init-file, and cj/org-alert-list-timers.  Each is exercised
+;; with `pop-to-buffer' and `load-file' mocked so the test doesn't open
+;; real windows or reload init.
+
+;;; Code:
+
+(require 'ert)
+(require 'cl-lib)
+
+(add-to-list 'load-path (expand-file-name "modules" user-emacs-directory))
+(require 'config-utilities)
+
+(defmacro test-config-utilities--with-display-mocks (&rest body)
+  "Run BODY with `pop-to-buffer' replaced so it doesn't open a window."
+  (declare (indent 0) (debug t))
+  `(cl-letf (((symbol-function 'pop-to-buffer)
+              (lambda (buf &rest _) (set-buffer buf) (current-buffer))))
+     ,@body))
+
+(ert-deftest test-config-utilities-info-emacs-build-creates-summary-buffer ()
+  "Smoke: `cj/info-emacs-build' creates *Emacs-Build-Summary* with content."
+  (let ((buf (get-buffer "*Emacs-Build-Summary*")))
+    (when buf (let ((kill-buffer-query-functions nil)) (kill-buffer buf))))
+  (test-config-utilities--with-display-mocks
+    (cj/info-emacs-build)
+    (let ((buf (get-buffer "*Emacs-Build-Summary*")))
+      (should (buffer-live-p buf))
+      (with-current-buffer buf
+        (should (string-match-p "Version:" (buffer-string))))
+      (let ((kill-buffer-query-functions nil)) (kill-buffer buf)))))
+
+(ert-deftest test-config-utilities-info-loaded-packages-creates-buffer ()
+  "Smoke: `cj/info-loaded-packages' creates *loaded-packages* with a count line."
+  (let ((buf (get-buffer "*loaded-packages*")))
+    (when buf (let ((kill-buffer-query-functions nil)) (kill-buffer buf))))
+  (test-config-utilities--with-display-mocks
+    (cj/info-loaded-packages)
+    (let ((buf (get-buffer "*loaded-packages*")))
+      (should (buffer-live-p buf))
+      (with-current-buffer buf
+        (should (string-match-p "total packages currently loaded"
+                                (buffer-string))))
+      (let ((kill-buffer-query-functions nil)) (kill-buffer buf)))))
+
+(ert-deftest test-config-utilities-info-loaded-features-creates-buffer ()
+  "Smoke: `cj/info-loaded-features' creates *loaded-features* with a count line."
+  (let ((buf (get-buffer "*loaded-features*")))
+    (when buf (let ((kill-buffer-query-functions nil)) (kill-buffer buf))))
+  (test-config-utilities--with-display-mocks
+    (cj/info-loaded-features)
+    (let ((buf (get-buffer "*loaded-features*")))
+      (should (buffer-live-p buf))
+      (with-current-buffer buf
+        (should (string-match-p "features currently loaded"
+                                (buffer-string))))
+      (let ((kill-buffer-query-functions nil)) (kill-buffer buf)))))
+
+(ert-deftest test-config-utilities-reload-init-file-loads-user-init-file ()
+  "Smoke: `cj/reload-init-file' calls `load-file' on `user-init-file'."
+  (let (called-with)
+    (cl-letf (((symbol-function 'load-file)
+               (lambda (file) (setq called-with file))))
+      (cj/reload-init-file))
+    (should (equal called-with user-init-file))))
+
+(ert-deftest test-config-utilities-org-alert-list-timers-no-timers-messages ()
+  "Boundary: `cj/org-alert-list-timers' with no matching timers emits a
+\"none found\" message."
+  (let (captured)
+    (cl-letf ((timer-list nil)
+              ((symbol-function 'message)
+               (lambda (fmt &rest args)
+                 (setq captured (apply #'format fmt args)))))
+      (cj/org-alert-list-timers))
+    (should (string-match-p "No org-alert-check timers" captured))))
+
+(provide 'test-config-utilities--info-commands-smoke)
+;;; test-config-utilities--info-commands-smoke.el ends here