test: add gloss secondary commands test suite (red phase)

Six test files for the remaining stub commands. All 14 tests fail at
this commit because the implementations are stubs.

`gloss--add-finish-internal' (the pure save side of `gloss-add') gets
N/B/E coverage on validation and the persistence side effect.
`gloss--stats-text' (the pure stats string formatter) covers empty,
populated, and missing-file cases. The interactive commands
(`gloss-edit', `gloss-list-terms', `gloss-reload', `gloss-drill-export')
get smoke tests only — the design treats them as mode-glue with 70%
coverage targets, since prompts and `switch-to-buffer' are framework
behaviour Emacs already tests.

Two error-path tests assert the message contains a specific substring,
not just that `user-error' was raised. The stubs raise `user-error' too,
so a bare `should-error' would pass for the wrong reason. The substring
check anchors red against the real error path.

1 files changed, 61 insertions, 0 deletions

diff --git a/tests/test-gloss--add-finish-internal.el b/tests/test-gloss--add-finish-internal.el
new file mode 100644
index 0000000..688d6f2
--- /dev/null
+++ b/tests/test-gloss--add-finish-internal.el
@@ -0,0 +1,61 @@
+;;; test-gloss--add-finish-internal.el --- Tests for gloss--add-finish-internal -*- lexical-binding: t -*-
+
+;; SPDX-License-Identifier: GPL-3.0-or-later
+
+;;; Commentary:
+;; Tests for the pure save-side helper `gloss--add-finish-internal'.
+;; The interactive temp-buffer UI is exercised separately at the smoke
+;; level; this file covers the term/body validation and the persistence
+;; side effect via a real temp glossary.
+
+;;; Code:
+
+(require 'ert)
+(require 'cl-lib)
+(require 'gloss)
+(require 'testutil-gloss)
+
+(ert-deftest test-gloss-add-finish-internal-saves-and-shows ()
+  "Normal: a fresh term + body is saved with source `manual' and shown."
+  (gloss-test--with-missing-glossary
+    (let (shown)
+      (cl-letf (((symbol-function 'gloss-display-show-entry)
+                 (lambda (term body) (setq shown (list term body)))))
+        (gloss--add-finish-internal "newterm" "A new definition.")
+        (let ((saved (gloss-core-lookup "newterm")))
+          (should saved)
+          (should (equal (plist-get saved :body) "A new definition."))
+          (should (eq (plist-get saved :source) 'manual)))
+        (should (equal shown '("newterm" "A new definition.")))))))
+
+(ert-deftest test-gloss-add-finish-internal-empty-term-raises ()
+  "Error: empty TERM raises `user-error'."
+  (gloss-test--with-missing-glossary
+    (cl-letf (((symbol-function 'gloss-display-show-entry)
+               (lambda (_ _) nil)))
+      (should-error (gloss--add-finish-internal "" "Body.")
+                    :type 'user-error)
+      (should-error (gloss--add-finish-internal "   " "Body.")
+                    :type 'user-error))))
+
+(ert-deftest test-gloss-add-finish-internal-empty-body-raises ()
+  "Error: empty BODY raises `user-error'."
+  (gloss-test--with-missing-glossary
+    (cl-letf (((symbol-function 'gloss-display-show-entry)
+               (lambda (_ _) nil)))
+      (should-error (gloss--add-finish-internal "term" "")
+                    :type 'user-error)
+      (should-error (gloss--add-finish-internal "term" "   \n  ")
+                    :type 'user-error))))
+
+(ert-deftest test-gloss-add-finish-internal-trims-body-whitespace ()
+  "Boundary: leading/trailing whitespace in BODY is trimmed before save."
+  (gloss-test--with-missing-glossary
+    (cl-letf (((symbol-function 'gloss-display-show-entry)
+               (lambda (_ _) nil)))
+      (gloss--add-finish-internal "term" "  Body content.\n\n")
+      (let ((saved (gloss-core-lookup "term")))
+        (should (equal (plist-get saved :body) "Body content."))))))
+
+(provide 'test-gloss--add-finish-internal)
+;;; test-gloss--add-finish-internal.el ends here