chore: coverage, autoload fix, and internal cleanup for org-drill

A batch of test-coverage and hardening work, squashed from the test-work branch.

Tests: deduplicated a colliding leitner-capture test name so make test-name loads again. Added SM2 assert-failure cases, the six basic multicloze variant delegations, the three English-side spanish-verb branches, and org-drill-current-scope branch coverage.

Fix: the entry-point commands (org-drill itself, cram-tree, tree, directory, resume, relearn-item, strip-all-data, merge-buffers) carried no autoload cookies, so M-x failed from a fresh install until something pulled the file in. They're autoloaded now.

Perf: org-drill-shuffle was quadratic because it indexed a list with elt on every swap. It runs a linear Fisher-Yates pass over a vector now, and it checks its argument is a list.

Feat: added org-drill-version, a constant plus an interactive command, so a bug reporter doesn't have to open the file header.

Refactor: extracted org-drill--format-tense-mood, shared by the two verb-conjugation presenters that each carried a copy.

Docs: explained the SM8 magic numbers in the simple8 helpers as empirical fits rather than tunable knobs.

1 files changed, 48 insertions, 0 deletions

diff --git a/tests/test-org-drill-current-scope.el b/tests/test-org-drill-current-scope.el
new file mode 100644
index 0000000..9743c5f
--- /dev/null
+++ b/tests/test-org-drill-current-scope.el
@@ -0,0 +1,48 @@
+;;; test-org-drill-current-scope.el --- Tests for org-drill-current-scope  -*- lexical-binding: t; -*-
+
+;;; Commentary:
+;; org-drill-current-scope translates a drill scope into the scope argument
+;; org-map-entries expects, and org-drill-map-entries delegates to it.  The
+;; map-entries mapping itself and drill-match filtering are covered in
+;; test-org-drill.el (find-entries / find-tagged-entries); this file covers
+;; the scope-translation branches, which had no tests.
+
+;;; Code:
+
+(require 'ert)
+(require 'cl-lib)
+(require 'org-drill)
+
+(ert-deftest test-org-drill-current-scope-file-returns-nil ()
+  "Scope `file' maps to nil — the current buffer, respecting narrowing."
+  (should (null (org-drill-current-scope 'file))))
+
+(ert-deftest test-org-drill-current-scope-file-no-restriction-returns-file ()
+  "Scope `file-no-restriction' maps to `file' — whole buffer, ignoring narrowing."
+  (should (eq 'file (org-drill-current-scope 'file-no-restriction))))
+
+(ert-deftest test-org-drill-current-scope-custom-symbol-passes-through ()
+  "An unrecognized scope such as `tree' is returned unchanged."
+  (should (eq 'tree (org-drill-current-scope 'tree))))
+
+(ert-deftest test-org-drill-current-scope-nil-falls-back-to-org-drill-scope ()
+  "A nil scope falls back to the value of `org-drill-scope'."
+  (let ((org-drill-scope 'tree))
+    (should (eq 'tree (org-drill-current-scope nil)))))
+
+(ert-deftest test-org-drill-current-scope-directory-lists-org-files ()
+  "Scope `directory' returns the .org files in the current file's directory."
+  (let (captured-dir)
+    (cl-letf (((symbol-function 'buffer-file-name)
+               (lambda (&rest _) "/tmp/deck/cards.org"))
+              ((symbol-function 'directory-files)
+               (lambda (dir _full _match)
+                 (setq captured-dir dir)
+                 '("/tmp/deck/a.org" "/tmp/deck/b.org"))))
+      (let ((result (org-drill-current-scope 'directory)))
+        (should (equal "/tmp/deck/" captured-dir))
+        (should (equal '("/tmp/deck/a.org" "/tmp/deck/b.org") result))))))
+
+(provide 'test-org-drill-current-scope)
+
+;;; test-org-drill-current-scope.el ends here