From 7001e593e0c4ce000e03327e39642e2f5db43247 Mon Sep 17 00:00:00 2001
From: JSDurand <mmemmew@gmail.com>
Date: Wed, 12 Jan 2022 19:22:08 +0800
Subject: c-conf: add test files by a key-binding

Add a function to generate a skeleton test file automatically, and
bind that to a key.
---
 c-conf.el | 32 ++++++++++++++++++++++++++++----
 1 file changed, 28 insertions(+), 4 deletions(-)

(limited to 'c-conf.el')

diff --git a/c-conf.el b/c-conf.el
index b6cad71..24f3472 100644
--- a/c-conf.el
+++ b/c-conf.el
@@ -33,18 +33,18 @@
 (define-key c-mode-map (vector 'S-tab) #'ff-find-other-file)
 
 ;;; prefix map
-(defvar durand-c-prefix-map '(keymap)
+(defvar durand-c-prefix-map (make-sparse-keymap)
   "The keymap of my custom functions.
 This will be bound to the key ù.")
 
 (let ((map durand-c-prefix-map))
   (define-key map (vector ?i) #'durand-c-include)
-  (define-key map (vector ?p) #'c-generate-pragma))
+  (define-key map (vector ?p) #'c-generate-pragma)
+  (define-key map (vector ?t) #'c-generate-test))
 
 ;; generate pragmas automatically.
 (define-key c-mode-map (vector ?ù) durand-c-prefix-map)
 
-;;;###autoload
 (defun c-generate-pragma ()
   "Generate default pragmas for a C header file.
 If invoked on a C file, include the corresponding header file."
@@ -74,7 +74,6 @@ If invoked on a C file, include the corresponding header file."
                      "c\\(p*\\)$" "h\\1" (buffer-name))))
     (newline))))
 
-;;;###autoload
 (defun durand-c-include (&optional arg)
   "Include a library.
 If ARG is non-nil, ask for the type of the include: whether the
@@ -106,5 +105,30 @@ angle bracket type or the quote type."
                       ((eq type 'quote) "\""))
                 "\n")))))
 
+(defun c-generate-test ()
+  "Generate or find a test file for the current C file."
+  (interactive)
+  (cond
+   ((derived-mode-p 'c-mode))
+   ((user-error "Not in C-mode")))
+  (let* ((f-name (buffer-file-name))
+         (base (file-name-base f-name))
+         (t-name
+          (cond
+           ((null f-name)
+            (user-error "Buffer not associated to a file"))
+           ((expand-file-name
+             (expand-file-name
+              (format "check_%s.c" base) "test")
+             (file-name-directory f-name))))))
+    (cond
+     ((file-exists-p t-name))
+     ((write-region
+       (format "#include \"../%s.h\"\n\n%s"
+               base
+               "int main(int argc, char **argv)\n{\n  return 0;\n}\n")
+       nil t-name)))
+    (find-file t-name)))
+
 (provide 'c-conf)
 ;;; c-conf.el ends here
-- 
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