add tests for variable bindings

test/automated/bindings.el

@@ -0,0 +1,99 @@
+;;; bindings.el --- tests for variable bindings
+
+;; Copyright (C) 2012  Free Software Foundation, Inc.
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs 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.
+
+;; GNU Emacs 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 GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Code:
+
+(defvar binding-test-buffer-A (get-buffer-create "A"))
+(defvar binding-test-buffer-B (get-buffer-create "B"))
+
+(defvar binding-test-always-local 'always)
+(make-variable-buffer-local 'binding-test-always-local)
+
+(defvar binding-test-some-local 'some)
+(with-current-buffer binding-test-buffer-A
+  (set (make-local-variable 'binding-test-some-local) 'local))
+
+(ert-deftest binding-test-manual ()
+  "A test case from the elisp manual."
+  (save-excursion
+    (set-buffer binding-test-buffer-A)
+    (let ((binding-test-some-local 'something-else))
+      (should (eq binding-test-some-local 'something-else))
+      (set-buffer binding-test-buffer-B)
+      (should (eq binding-test-some-local 'some)))
+    (should (eq binding-test-some-local 'some))
+    (set-buffer binding-test-buffer-A)
+    (should (eq binding-test-some-local 'local))))
+
+(ert-deftest binding-test-setq-default ()
+  "Test that a setq-default has no effect when there is a local binding."
+  (save-excursion
+    (set-buffer binding-test-buffer-B)
+    ;; This variable is not local in this buffer.
+    (let ((binding-test-some-local 'something-else))
+      (setq-default binding-test-some-local 'new-default))
+    (should (eq binding-test-some-local 'some))))
+
+(ert-deftest binding-test-makunbound ()
+  "Tests of makunbound, from the manual."
+  (save-excursion
+    (set-buffer binding-test-buffer-B)
+    (should (boundp 'binding-test-some-local))
+    (let ((binding-test-some-local 'outer))
+      (let ((binding-test-some-local 'inner))
+	(makunbound 'binding-test-some-local)
+	(should (not (boundp 'binding-test-some-local))))
+      (should (and (boundp 'binding-test-some-local)
+		   (eq binding-test-some-local 'outer))))))
+
+(ert-deftest binding-test-defvar-bool ()
+  "Test DEFVAR_BOOL"
+  (let ((display-hourglass 5))
+    (should (eq display-hourglass t))))
+
+(ert-deftest binding-test-defvar-int ()
+  "Test DEFVAR_INT"
+  (should-error (setq gc-cons-threshold 5.0) :type 'wrong-type-argument))
+
+(ert-deftest binding-test-set-constant-t ()
+  "Test setting the constant t"
+  (should-error (setq t 'bob) :type 'setting-constant))
+
+(ert-deftest binding-test-set-constant-nil ()
+  "Test setting the constant nil"
+  (should-error (setq nil 'bob) :type 'setting-constant))
+
+(ert-deftest binding-test-set-constant-keyword ()
+  "Test setting a keyword constant"
+  (should-error (setq :keyword 'bob) :type 'setting-constant))
+
+(ert-deftest binding-test-set-constant-nil ()
+  "Test setting a keyword to itself"
+  (should (setq :keyword :keyword)))
+
+;; More tests to write -
+;; kill-local-variable
+;; defconst; can modify
+;; defvar and defconst modify the local binding [ doesn't matter for us ]
+;; various kinds of special internal forwarding objects
+;;   a couple examples in manual, not enough
+;; frame-local vars
+;; variable aliases
+
+;;; bindings.el ends here