Use treesitter to get gotest subtests and function name

my-gotest-sub.el

(defvar my-gotest-get-subtest-key "name")

(defun my-gotest-get-subtest-ts ()
  (let* ((struct-node (treesit-parent-until
                       (treesit-node-at (point))
                       (lambda (n)
                         (string-equal (treesit-node-type n) "literal_value"))))
         (funcname
          (substring-no-properties
           (treesit-node-text
            (treesit-node-child-by-field-name (treesit-defun-at-point) "name"))))
         (children (when struct-node
                     (treesit-node-children struct-node)))
         (subtest nil))
    (when struct-node
      (dolist (child children)
        (when (and (string-equal (treesit-node-type child) "keyed_element")
                   (string-match (concat "^" my-gotest-get-subtest-key ":\\s-*\"\\(.*\\)\"$") (treesit-node-text child)))
          (setq subtest
                (shell-quote-argument
                 (replace-regexp-in-string " " "_" (match-string-no-properties 1 (treesit-node-text child))))))))
    (concat (format "^%s%s$" funcname (if subtest (concat "/" subtest) "")))))

(defun my-gotest-maybe-ts-run()
  "Run the test function at point or the subtest at point if it is a subtest."
  (interactive)
  (when (string-match "_test\\.go" (buffer-file-name))
    (let ((gotest (my-gotest-get-subtest-ts)))
      (go-test--go-test (concat "-run " gotest " .")))))