Port font lock test infrastructure and some basic tests over from clo…

…jure-mode

test/clojure-ts-mode-font-lock-test.el

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+;;; clojure-ts-mode-font-lock-test.el --- Clojure TS Mode: font lock 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)
+
+;; (use-package buttercup)
+
+;;;; Utilities
+
+(defmacro with-fontified-clojure-ts-buffer (content &rest body)
+  "Evaluate BODY in a temporary buffer with CONTENT."
+  (declare (debug t)
+           (indent 1))
+  `(with-clojure-ts-buffer ,content
+                           (font-lock-ensure)
+                           (goto-char (point-min))
+                           ,@body))
+
+(defun clojure-ts-get-face-at (start end content)
+  "Get the face between START and END in CONTENT."
+  (with-fontified-clojure-ts-buffer content
+    (let ((start-face (get-text-property start 'face))
+          (all-faces (cl-loop for i from start to end collect (get-text-property
+                                                               i 'face))))
+      (if (cl-every (lambda (face) (eq face start-face)) all-faces)
+          start-face
+        'various-faces))))
+
+(defun expect-face-at (content start end face)
+  "Expect face in CONTENT between START and END to be equal to FACE."
+  (expect (clojure-ts-get-face-at start end content) :to-equal face))
+
+(defun expect-faces-at (content &rest faces)
+  "Expect FACES in CONTENT.
+
+FACES is a list of the form (content (start end expected-face)*)"
+  (dolist (face faces)
+    (apply (apply-partially #'expect-face-at content) face)))
+
+(defmacro when-fontifying-it (description &rest tests)
+  "Return a buttercup spec.
+
+TESTS are lists of the form (content (start end expected-face)*).  For each test
+check that each `expected-face` is found in `content` between `start` and `end`.
+
+DESCRIPTION is the description of the spec."
+  (declare (indent 1))
+  `(it ,description
+     (dolist (test (quote ,tests))
+       (apply #'expect-faces-at test))))
+
+;;;; Font locking
+
+(describe "clojure-ts-mode-syntax-table"
+  (when-fontifying-it "should handle any known def form"
+    ("(def a 1)" (2 4 font-lock-keyword-face))
+    ("(defonce a 1)" (2 8 font-lock-keyword-face))
+    ("(defn a [b])" (2 5 font-lock-keyword-face))
+    ("(defmacro a [b])" (2 9 font-lock-keyword-face))
+    ("(definline a [b])" (2 10 font-lock-keyword-face))
+    ("(defmulti a identity)" (2 9 font-lock-keyword-face))
+    ("(defmethod a :foo [b] (println \"bar\"))" (2 10 font-lock-keyword-face))
+    ("(defprotocol a (b [this] \"that\"))" (2 12 font-lock-keyword-face))
+    ("(definterface a (b [c]))" (2 13 font-lock-keyword-face))
+    ("(defrecord a [b c])" (2 10 font-lock-keyword-face))
+    ("(deftype a [b c])" (2 8 font-lock-keyword-face))
+    ("(defstruct a :b :c)" (2 10 font-lock-keyword-face))
+    ("(deftest a (is (= 1 1)))" (2 8 font-lock-keyword-face))
+
+
+    ;; TODO: copied from clojure-mode, but failing
+    ;; ("(defne [x y])" (2 6 font-lock-keyword-face))
+    ;; ("(defnm a b)" (2 6 font-lock-keyword-face))
+    ;; ("(defnu)" (2 6 font-lock-keyword-face))
+    ;; ("(defnc [a])" (2 6 font-lock-keyword-face))
+    ;; ("(defna)" (2 6 font-lock-keyword-face))
+    ;; ("(deftask a)" (2 8 font-lock-keyword-face))
+    ;; ("(defstate a :start \"b\" :stop \"c\")" (2 9 font-lock-keyword-face)))
+  )