test: add gloss-drill test suite (red phase)

Four test files plus a small testutil for toggling the `org-drill'
feature flag. All 10 tests fail at this commit because the implementation
is still a stub.

The suite covers Normal (untagged entries get the tag and property),
Boundary (empty file, idempotency, untag never-tagged), and Error
(org-drill not installed). The error path also asserts the file is left
untouched. Untag-all is tested under both feature states because the
user might want to remove tags after uninstalling org-drill.

1 files changed, 56 insertions, 0 deletions

diff --git a/tests/test-gloss-drill--untag-all.el b/tests/test-gloss-drill--untag-all.el
new file mode 100644
index 0000000..7fe9986
--- /dev/null
+++ b/tests/test-gloss-drill--untag-all.el
@@ -0,0 +1,56 @@
+;;; test-gloss-drill--untag-all.el --- Tests for gloss-drill-untag-all -*- lexical-binding: t -*-
+
+;; SPDX-License-Identifier: GPL-3.0-or-later
+
+;;; Commentary:
+;; Tests for `gloss-drill-untag-all' covering Normal (export then untag),
+;; Boundary (untag when nothing was tagged), and the no-org-drill-needed
+;; case (untag must work without `org-drill' installed, since the user
+;; might want to remove tags after uninstalling).
+
+;;; Code:
+
+(require 'ert)
+(require 'gloss-drill)
+(require 'testutil-gloss)
+(require 'testutil-gloss-drill)
+
+(defun gloss-test--no-drill-tags-or-properties-p ()
+  "Return non-nil when no top-level entry carries :drill: or DRILL_CARD_TYPE.
+Reads the file fresh from disk."
+  (with-current-buffer (find-file-noselect gloss-file)
+    (revert-buffer t t t)
+    (let ((dirty nil))
+      (org-map-entries
+       (lambda ()
+         (when (= 1 (org-current-level))
+           (when (or (member "drill" (org-get-tags nil t))
+                     (org-entry-get nil "DRILL_CARD_TYPE"))
+             (setq dirty t)))))
+      (not dirty))))
+
+(ert-deftest test-gloss-drill-untag-all-removes-tag-and-property ()
+  "Normal: untag-all removes :drill: and :DRILL_CARD_TYPE: from every entry."
+  (gloss-test--with-temp-glossary gloss-test--sample-content
+    (gloss-test--with-org-drill-feature
+      (gloss-drill-export-all)
+      (gloss-drill-untag-all)
+      (should (gloss-test--no-drill-tags-or-properties-p)))))
+
+(ert-deftest test-gloss-drill-untag-all-no-op-when-nothing-tagged ()
+  "Boundary: untag-all on never-tagged entries is a no-op, no error."
+  (gloss-test--with-temp-glossary gloss-test--sample-content
+    (gloss-drill-untag-all)
+    (should (gloss-test--no-drill-tags-or-properties-p))))
+
+(ert-deftest test-gloss-drill-untag-all-works-without-org-drill-installed ()
+  "Boundary: untag-all does NOT require org-drill to be installed."
+  (gloss-test--with-temp-glossary gloss-test--sample-content
+    (gloss-test--with-org-drill-feature
+      (gloss-drill-export-all))
+    (gloss-test--without-org-drill-feature
+      (gloss-drill-untag-all)
+      (should (gloss-test--no-drill-tags-or-properties-p)))))
+
+(provide 'test-gloss-drill--untag-all)
+;;; test-gloss-drill--untag-all.el ends here