From e55e64373c0b2ac0462df9e90417f854dcb16d11 Mon Sep 17 00:00:00 2001
From: jao <jao@gnu.org>
Date: Mon, 18 May 2026 13:29:37 +0100
Subject: rust: improvements locating validation tests

---
 lib/prog/jao-rust.el | 33 +++++++++++++++++++++------------
 1 file changed, 21 insertions(+), 12 deletions(-)

(limited to 'lib/prog')

diff --git a/lib/prog/jao-rust.el b/lib/prog/jao-rust.el
index 5e20744..2281875 100644
--- a/lib/prog/jao-rust.el
+++ b/lib/prog/jao-rust.el
@@ -34,17 +34,23 @@
   (let* ((root (expand-file-name (jao-rust--root)))
          (current (file-name-sans-extension (buffer-file-name)))
          (rel (string-replace root "" current)))
-    (thread-last
-      rel
-      (replace-regexp-in-string "^src\\(/bin\\)?/" "")
-      (string-replace "-" "_")
-      (replace-regexp-in-string "/\\(mod\\|lib\\|main\\)$" "")
-      (string-replace "/" "::"))))
+    (and (string-prefix-p "src/" rel)
+         (thread-last
+           rel
+           (replace-regexp-in-string "^src\\(/bin\\)?/" "")
+           (string-replace "-" "_")
+           (replace-regexp-in-string "/\\(mod\\|lib\\|main\\)$" "")
+           (string-replace "/" "::")))))
+
+(defun jao-rust--tests-prefix ()
+  (if-let* ((m (jao-rust-current-module-name)))
+      (concat m "::tests::")
+    ""))
 
 (defconst jao-rust--test-header-rx
   (concat "#\\[" (regexp-opt '("test" "quickcheck" "tokio::test") t)))
 
-(defconst jao-rust--test-name-rx "^ *\\(pub\\)?\\( async\\)? fn \\([^(]+\\)(")
+(defconst jao-rust--test-name-rx "^ *\\(pub \\)?\\( async \\)?fn \\([^(]+\\)(")
 
 (defun jao-rust-test-at-point ()
   (when (looking-at jao-rust--test-name-rx) (match-string-no-properties 3)))
@@ -62,6 +68,9 @@
   (interactive)
   (or (re-search-forward jao-rust--tests-mod-rx nil t)
       (re-search-backward jao-rust--tests-mod-rx nil t)
+      (progn
+        (goto-char (point-min))
+        (re-search-forward jao-rust--test-header-rx nil t))
       (when (y-or-n-p "No tests module. Add it?")
         (goto-char (point-max))
         (insert "\n#[cfg(test)]\nmod tests {\n\n}")
@@ -69,9 +78,9 @@
 
 (defun jao-rust-test-current ()
   (interactive)
-  (if-let* ((m (jao-rust-current-module-name))
+  (if-let* ((m (jao-rust--tests-prefix))
             (n (jao-rust-test-before-point)))
-      (let ((rustic-test-arguments (format "-- --exact %s::tests::%s" m n))
+      (let ((rustic-test-arguments (format "-- --exact %s%s" m n))
             (rustic-cargo-use-last-stored-arguments t))
         (rustic-cargo-test))
     (message "No test before point")))
@@ -89,9 +98,9 @@
   (interactive)
   (let ((tests (jao-rust-buffer-tests)))
     (if (seq-empty-p tests)
-        (messages "No tests in this module")
-      (let* ((mod (jao-rust-current-module-name))
-             (tests (mapconcat (lambda (x) (format "%s::tests::%s" mod x)) tests " "))
+        (message "No tests in this module")
+      (let* ((prefix (jao-rust--tests-prefix))
+             (tests (mapconcat (lambda (x) (format "%s%s" prefix x)) tests " "))
              (rustic-test-arguments (format "-- --exact %s" tests))
              (rustic-cargo-use-last-stored-arguments t))
         (rustic-cargo-test)))))
-- 
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