test: harden test dependency and temp-dir setup

1 files changed, 38 insertions, 0 deletions

diff --git a/tests/check-deps.el b/tests/check-deps.el
new file mode 100644
index 0000000..0cfa99c
--- /dev/null
+++ b/tests/check-deps.el
@@ -0,0 +1,38 @@
+;;; check-deps.el --- Verify test dependencies are loadable -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2026 Craig Jennings
+
+;;; Commentary:
+
+;; Loaded by tests/Makefile's check-deps target after eask has prepared the
+;; test environment.  Keep dependency discovery inside Emacs so package.el,
+;; package-vc, Eask, Nix, and pre-populated load-path setups all work the same
+;; way: a dependency is available if Emacs can require it.
+
+;;; Code:
+
+(when noninteractive
+  (package-initialize))
+
+(defconst chime-check-deps-required-features
+  '(dash alert async org-agenda)
+  "Features required by the Chime test suite.")
+
+(defun chime-check-deps--missing-features ()
+  "Return required test features that cannot be loaded."
+  (let (missing)
+    (dolist (feature chime-check-deps-required-features (nreverse missing))
+      (unless (require feature nil t)
+        (push feature missing)))))
+
+(let ((missing (chime-check-deps--missing-features)))
+  (if missing
+      (progn
+        (message "Missing Emacs Lisp test dependencies: %s"
+                 (mapconcat #'symbol-name missing ", "))
+        (message "Run `make setup' from the project root, or make these features available on load-path.")
+        (kill-emacs 1))
+    (message "Required Emacs Lisp dependencies are loadable: %s"
+             (mapconcat #'symbol-name chime-check-deps-required-features ", "))))
+
+;;; check-deps.el ends here