bug#24603: [RFC 01/18] Add tests for casefiddle.c

[Michal Nazarewicz]

Fixes cases marked FIXME upcoming in followup commits.

* test/src/casefiddle-tests.el (casefiddle-tests-char-properties,
casefiddle-tests-case-table, casefiddle-tests-casing-character,
casefiddle-tests-casing): New test cases.
---
 test/src/casefiddle-tests.el | 190 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 190 insertions(+)
 create mode 100644 test/src/casefiddle-tests.el

diff --git a/test/src/casefiddle-tests.el b/test/src/casefiddle-tests.el
new file mode 100644
index 0000000..4b2eeaf
--- /dev/null
+++ b/test/src/casefiddle-tests.el
@@ -0,0 +1,190 @@
+;;; casefiddle-tests.el --- tests for casefiddle.c functions -*- 
lexical-binding: t -*-
+
+;; Copyright (C) 2015-2016 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:
+
+(require 'ert)
+
+(ert-deftest casefiddle-tests-char-properties ()
+  "Sanity check of character Unicode properties."
+  (should-not
+   (let (errors)
+     ;;            character  uppercase  lowercase  titlecase
+     (dolist (test '((?A nil ?a nil)
+                     (?a ?A nil ?A)
+                     (?Ł nil ?ł nil)
+                     (?ł ?Ł nil ?Ł)
+
+                     (?DŽ nil ?dž ?Dž)
+                     (?Dž ?DŽ ?dž ?Dž)
+                     (?dž ?DŽ nil ?Dž)
+
+                     (?Σ nil ?σ nil)
+                     (?σ ?Σ nil ?Σ)
+                     (?ς ?Σ nil ?Σ)
+
+                     (?ⅷ ?Ⅷ nil ?Ⅷ)
+                     (?Ⅷ nil ?ⅷ nil)))
+       (let ((ch (car test))
+             (expected (cdr test))
+             (props '(uppercase lowercase titlecase)))
+         (while props
+           (let ((got (get-char-code-property ch (car props))))
+             (unless (equal (car expected) got)
+               (push (format "\n%c %s; expected: %s but got: %s"
+                             ch (car props) (car expected) got)
+                     errors)))
+           (setq props (cdr props) expected (cdr expected)))))
+     (when errors
+       (mapconcat (lambda (line) line) (nreverse errors) "")))))
+
+
+(defconst casefiddle-tests--characters
+  ;; character  uppercase  lowercase  titlecase
+  '((?A ?A ?a ?A)
+    (?a ?A ?a ?A)
+    (?Ł ?Ł ?ł ?Ł)
+    (?ł ?Ł ?ł ?Ł)
+
+    ;; FIXME: We should have:
+    ;;(?DŽ ?DŽ ?dž ?Dž)
+    ;; but instead we have:
+    (?DŽ ?DŽ ?dž ?DŽ)
+    ;; FIXME: Those two are broken at the moment:
+    ;;(?Dž ?DŽ ?dž ?Dž)
+    ;;(?dž ?DŽ ?dž ?Dž)
+
+    (?Σ ?Σ ?σ ?Σ)
+    (?σ ?Σ ?σ ?Σ)
+    ;; FIXME: Another broken one:
+    ;;(?ς ?Σ ?ς ?Σ)
+
+    (?Ⅷ ?Ⅷ ?ⅷ ?Ⅷ)
+    (?ⅷ ?Ⅷ ?ⅷ ?Ⅷ)))
+
+
+(ert-deftest casefiddle-tests-case-table ()
+  "Sanity check of down and up case tables."
+  (should-not
+   (let (errors
+         (up (case-table-get-table (current-case-table) 'up))
+         (down (case-table-get-table (current-case-table) 'down)))
+     (dolist (test casefiddle-tests--characters)
+       (let ((ch (car test))
+             (expected (cdr test))
+             (props '(uppercase lowercase))
+             (tabs (list up down)))
+         (while props
+           (let ((got (aref (car tabs) ch)))
+             (unless (equal (car expected) got)
+               (push (format "\n%c %s; expected: %s but got: %s"
+                             ch (car props) (car expected) got)
+                     errors)))
+           (setq props (cdr props) tabs (cdr tabs) expected (cdr expected)))))
+     (when errors
+       (mapconcat (lambda (line) line) (nreverse errors) "")))))
+
+
+(ert-deftest casefiddle-tests-casing-character ()
+  (should-not
+   (let (errors)
+     (dolist (test casefiddle-tests--characters)
+       (let ((ch (car test))
+             (expected (cdr test))
+             (funcs '(upcase downcase capitalize)))
+         (while funcs
+           (let ((got (funcall (car funcs) ch)))
+             (unless (equal (car expected) got)
+               (push (format "\n%c %s; expected: %s but got: %s"
+                             ch (car funcs) (car expected) got)
+                     errors)))
+           (setq funcs (cdr funcs) expected (cdr expected)))))
+     (when errors
+       (mapconcat (lambda (line) line) (nreverse errors) "")))))
+
+
+(ert-deftest casefiddle-tests-casing-word ()
+  (with-temp-buffer
+    (dolist (test '((upcase-word     . "FOO Bar")
+                    (downcase-word   . "foo Bar")
+                    (capitalize-word . "Foo Bar")))
+      (dolist (back '(nil t))
+        (delete-region (point-min) (point-max))
+        (insert "foO Bar")
+        (goto-char (+ (if back 4 0) (point-min)))
+        (funcall (car test) (if back -1 1))
+        (should (string-equal (cdr test) (buffer-string)))
+        (should (equal (+ (if back 4 3) (point-min)) (point)))))))
+
+
+(ert-deftest casefiddle-tests-casing ()
+  (should-not
+   (let (errors)
+     (with-temp-buffer
+       (dolist
+           (test
+            ;; input  upcase  downcase  capitalize  upcase-initials
+            '(("Foo baR" "FOO BAR" "foo bar" "Foo Bar" "Foo BaR")
+              ("Ⅷ ⅷ" "Ⅷ Ⅷ" "ⅷ ⅷ" "Ⅷ Ⅷ" "Ⅷ Ⅷ")
+              ;; FIXME: Everything below is broken at the moment.  Here’s what
+              ;; should happen:
+              ;;("DŽUNGLA" "DŽUNGLA" "džungla" "Džungla" "DžUNGLA")
+              ;;("Džungla" "DŽUNGLA" "džungla" "Džungla" "Džungla")
+              ;;("džungla" "DŽUNGLA" "džungla" "Džungla" "Džungla")
+              ;;("define" "DEFINE" "define" "Define" "Define")
+              ;;("fish" "FIsh" "fish" "Fish" "Fish")
+              ;;("Straße" "STRASSE" "straße" "Straße" "Straße")
+              ;;("ΌΣΟΣ" "ΌΣΟΣ" "όσος" "Όσος" "Όσος")
+              ;;("όσος" "ΌΣΟΣ" "όσος" "Όσος" "Όσος")
+              ;; And here’s what is actually happening:
+              ("DŽUNGLA" "DŽUNGLA" "džungla" "DŽungla" "DŽUNGLA")
+              ("Džungla" "DžUNGLA" "džungla" "Džungla" "Džungla")
+              ("džungla" "DŽUNGLA" "džungla" "DŽungla" "DŽungla")
+              ("define" "DEfiNE" "define" "Define" "Define")
+              ("fish" "fiSH" "fish" "fish" "fish")
+              ("Straße" "STRAßE" "straße" "Straße" "Straße")
+              ("ΌΣΟΣ" "ΌΣΟΣ" "όσοσ" "Όσοσ" "ΌΣΟΣ")
+              ("όσος" "ΌΣΟς" "όσος" "Όσος" "Όσος"))
+            (nreverse errors))
+         (let* ((input (car test))
+                (expected (cdr test))
+                (check (lambda (func got)
+                         (unless (string-equal got (car expected))
+                           (let ((fmt (length (symbol-name func))))
+                             (setq fmt (format "\n%%%ds: %%s" (max fmt 8)))
+                             (push (format (concat fmt fmt fmt)
+                                           func input
+                                           "expected" (car expected)
+                                           "but got" got)
+                                   errors))))))
+           (dolist (func '((upcase . upcase-region)
+                           (downcase . downcase-region)
+                           (capitalize . capitalize-region)
+                           (upcase-initials . upcase-initials-region)))
+             (funcall check (car func) (funcall (car func) input))
+             (funcall check (cdr func) (progn
+                                         (delete-region (point-min) 
(point-max))
+                                         (insert input)
+                                         (funcall (cdr func)
+                                                  (point-min) (point-max))
+                                         (buffer-string)))
+             (setq expected (cdr expected)))))))))
+
+
+;;; casefiddle-tests.el ends here
-- 
2.8.0.rc3.226.g39d4020