Port indentation testing infrastructure over from clojure-mode

Eldev

@@ -10,7 +10,7 @@
 
 (eldev-use-plugin 'autoloads)
 
-(eldev-add-extra-dependencies 'test 'buttercup)
+(eldev-add-extra-dependencies 'test 'buttercup 's)
 
 (setq byte-compile-docstring-max-column 240)
 (setq checkdoc-force-docstrings-flag nil)

test/clojure-ts-mode-indentation-test.el

@@ -0,0 +1,110 @@
+;;; clojure-ts-mode-indentation-test.el --- Clojure TS Mode: indentation test suite  -*- lexical-binding: t; -*-
+
+;; Copyright © 2022-2024 Danny Freeman
+
+;; This file is not part of GNU Emacs.
+
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; The unit test suite of Clojure TS Mode
+
+(require 'clojure-ts-mode)
+(require 'cl-lib)
+(require 'buttercup)
+(require 's nil t)               ;Don't burp if it's missing during compilation.
+
+
+(defmacro when-indenting-with-point-it (description before after)
+  "Return a buttercup spec.
+
+Check whether the swift indentation command will correctly change the buffer.
+Will also check whether point is moved to the expected position.
+
+BEFORE is the buffer string before indenting, where a pipe (|) represents
+point.
+
+AFTER is the expected buffer string after indenting, where a pipe (|)
+represents the expected position of point.
+
+DESCRIPTION is a string with the description of the spec."
+  (declare (indent 1))
+  `(it ,description
+    (let* ((after ,after)
+           (expected-cursor-pos (1+ (s-index-of "|" after)))
+           (expected-state (delete ?| after)))
+      (with-clojure-ts-buffer ,before
+        (goto-char (point-min))
+        (search-forward "|")
+        (delete-char -1)
+        (font-lock-ensure)
+        (indent-according-to-mode)
+        (expect (buffer-string) :to-equal expected-state)
+        (expect (point) :to-equal expected-cursor-pos)))))
+
+
+
+;; Backtracking indent
+(defmacro when-indenting-it (description &rest forms)
+  "Return a buttercup spec.
+
+Check that all FORMS correspond to properly indented sexps.
+
+DESCRIPTION is a string with the description of the spec."
+  (declare (indent 1))
+  `(it ,description
+     (progn
+       ,@(mapcar (lambda (form)
+                   `(with-temp-buffer
+                      (clojure-ts-mode)
+                      (insert "\n" ,form);,(replace-regexp-in-string "\n +" "\n " form))
+                      (indent-region (point-min) (point-max))
+                      (expect (buffer-string) :to-equal ,(concat "\n" form))))
+                 forms))))
+
+
+;; Provide font locking for easier test editing.
+
+(font-lock-add-keywords
+ 'emacs-lisp-mode
+ `((,(rx "(" (group "when-indenting-with-point-it") eow)
+    (1 font-lock-keyword-face))
+   (,(rx "("
+         (group "when-indenting-with-point-it") (+ space)
+         (group bow (+ (not space)) eow)
+         )
+    (1 font-lock-keyword-face)
+    (2 font-lock-function-name-face))))
+
+
+(describe "indentation"
+  (it "should not hang on end of buffer"
+    (with-clojure-ts-buffer "(let [a b]"
+      (goto-char (point-max))
+      (expect
+       (with-timeout (2)
+         (newline-and-indent)
+         t))))
+
+  (when-indenting-with-point-it "should have no indentation at top level"
+    "|x"
+
+    "|x")
+
+  (when-indenting-it "should handle non-symbol at start"
+    "
+{\"1\" 2
+ *3 4}")
+)