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+;;; test-org-link-edit.el --- Tests for org-link-edit.el
+
+;; Copyright (C) 2015 Kyle Meyer <kyle@kyleam.com>
+
+;; Author:  Kyle Meyer <kyle@kyleam.com>
+
+;; 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 <http://www.gnu.org/licenses/>.
+
+;;; Code:
+
+(require 'org-link-edit)
+(require 'ert)
+
+;; This is taken from `org-tests.el' (55c0708).
+(defmacro org-test-with-temp-text (text &rest body)
+  "Run body in a temporary buffer with Org-mode as the active
+mode holding TEXT.  If the string \"<point>\" appears in TEXT
+then remove it and place the point there before running BODY,
+otherwise place the point at the beginning of the inserted text."
+  (declare (indent 1))
+  `(let ((inside-text (if (stringp ,text) ,text (eval ,text)))
+         (org-mode-hook nil))
+     (with-temp-buffer
+       (org-mode)
+       (let ((point (string-match "<point>" inside-text)))
+         (if point
+             (progn
+               (insert (replace-match "" nil nil inside-text))
+               (goto-char (1+ (match-beginning 0))))
+           (insert inside-text)
+           (goto-char (point-min))))
+       ,@body)))
+(def-edebug-spec org-test-with-temp-text (form body))
+
+
+;;; Slurping
+
+(ert-deftest test-org-link-edit/forward-slurp-word ()
+  "Test `org-link-edit-forward-slurp-word'."
+  ;; Slurp one word into plain link.
+  (should
+   (string=
+    "\[\[http://orgmode.org/\]\[Org's\]\] website is"
+    (org-test-with-temp-text
+        "http://orgmode.org/ Org's website is"
+      (org-link-edit-forward-slurp-word)
+      (buffer-string))))
+  ;; Slurp one word into empty bracket link.
+  (should
+   (string=
+    "\[\[http://orgmode.org/\]\[Org's\]\] website is"
+    (org-test-with-temp-text
+        "\[\[http://orgmode.org/\]\] Org's website is"
+      (org-link-edit-forward-slurp-word)
+      (buffer-string))))
+  ;; Slurp one word into bracket link.
+  (should
+   (string=
+    "\[\[http://orgmode.org/\]\[Org's website\]\] is"
+    (org-test-with-temp-text
+        "\[\[http://orgmode.org/\]\[Org's\]\] website is"
+      (org-link-edit-forward-slurp-word)
+      (buffer-string))))
+  ;; Slurp two words into plain link.
+  (should
+   (string=
+    "\[\[http://orgmode.org/\]\[Org's website\]\] is"
+    (org-test-with-temp-text
+        "http://orgmode.org/ Org's website is"
+      (org-link-edit-forward-slurp-word 2)
+      (buffer-string))))
+  ;; Slurp two words into bracket link.
+  (should
+   (string=
+    "\[\[http://orgmode.org/\]\[Org's website is\]\]"
+    (org-test-with-temp-text
+        "\[\[http://orgmode.org/\]\[Org's\]\] website is"
+      (org-link-edit-forward-slurp-word 2)
+      (buffer-string))))
+  ;; Slurp new line as space.
+  (should
+   (string=
+    "\[\[http://orgmode.org/\]\[Org's website\]\] is"
+    (org-test-with-temp-text
+        "\[\[http://orgmode.org/\]\[Org's\]\]
+website is"
+      (org-link-edit-forward-slurp-word 1)
+      (buffer-string))))
+  ;; Slurp beyond the number of present words.
+  (should-error
+   (org-test-with-temp-text
+       "\[\[http://orgmode.org/\]\[Org's\]\] website is"
+     (org-link-edit-forward-slurp-word 3)
+     (buffer-string))
+   :type (list 'user-error)))
+
+(ert-deftest test-org-link-edit/backward-slurp-word ()
+  "Test `org-link-edit-backward-slurp-word'."
+  ;; Slurp one word into plain link.
+  (should
+   (string=
+    "Here \[\[http://orgmode.org/\]\[is\]\] Org's website"
+    (org-test-with-temp-text
+        "Here is <point>http://orgmode.org/ Org's website"
+      (org-link-edit-backward-slurp-word)
+      (buffer-string))))
+  ;; Slurp one word into empty bracket link.
+  (should
+   (string=
+    "Here \[\[http://orgmode.org/\]\[is\]\] Org's website"
+    (org-test-with-temp-text
+        "Here is <point>\[\[http://orgmode.org/\]\] Org's website"
+      (org-link-edit-backward-slurp-word)
+      (buffer-string))))
+  ;; Slurp one word into bracket link.
+  (should
+   (string=
+    "Here \[\[http://orgmode.org/\]\[is Org's\]\] website"
+    (org-test-with-temp-text
+        "Here is <point>\[\[http://orgmode.org/\]\[Org's\]\] website"
+      (org-link-edit-backward-slurp-word)
+      (buffer-string))))
+  ;; Slurp two words into plain link.
+  (should
+   (string=
+    "\[\[http://orgmode.org/\]\[Here is\]\] Org's website"
+    (org-test-with-temp-text
+        "Here is <point>http://orgmode.org/ Org's website"
+      (org-link-edit-backward-slurp-word 2)
+      (buffer-string))))
+  ;; Slurp two words into bracket link.
+  (should
+   (string=
+    "\[\[http://orgmode.org/\]\[Here is Org's\]\] website"
+    (org-test-with-temp-text
+        "Here is <point>\[\[http://orgmode.org/\]\[Org's\]\] website"
+      (org-link-edit-backward-slurp-word 2)
+      (buffer-string))))
+  ;; Slurp new line as space.
+  (should
+   (string=
+    "Here \[\[http://orgmode.org/\]\[is Org's website\]\]"
+    (org-test-with-temp-text
+        "Here is
+<point>\[\[http://orgmode.org/\]\[Org's website\]\]"
+      (org-link-edit-backward-slurp-word 1)
+      (buffer-string))))
+  ;; Slurp beyond the number of present words.
+  (should-error
+   (org-test-with-temp-text
+       "Here is <point>\[\[http://orgmode.org/\]\[Org's\]\] website"
+     (org-link-edit-backward-slurp-word 3)
+     (buffer-string))
+   :type (list 'user-error)))
+
+(ert-deftest test-org-link-edit/slurp-negative-argument ()
+  "Test `org-link-edit-forward-slurp-word' and
+`org-link-edit-backward-slurp-word' with negative arguments."
+  (should
+   (string=
+    (org-test-with-temp-text
+        "Here is <point>\[\[http://orgmode.org/\]\[Org's\]\] website"
+      (org-link-edit-forward-slurp-word 1)
+      (buffer-string))
+    (org-test-with-temp-text
+        "Here is <point>\[\[http://orgmode.org/\]\[Org's\]\] website"
+      (org-link-edit-backward-slurp-word -1)
+      (buffer-string))))
+  (should
+   (string=
+    (org-test-with-temp-text
+        "Here is <point>\[\[http://orgmode.org/\]\[Org's\]\] website"
+      (org-link-edit-forward-slurp-word -1)
+      (buffer-string))
+    (org-test-with-temp-text
+        "Here is <point>\[\[http://orgmode.org/\]\[Org's\]\] website"
+      (org-link-edit-backward-slurp-word)
+      (buffer-string)))))
+
+
+;;; Barfing
+
+(ert-deftest test-org-link-edit/forward-barf-word ()
+  "Test `org-link-edit-forward-barf-word'."
+  ;; Barf last word.
+  (should
+   (string=
+    "Org's \[\[http://orgmode.org/\]\] website is"
+    (org-test-with-temp-text
+        "Org's <point>\[\[http://orgmode.org/\]\[website\]\] is"
+      (org-link-edit-forward-barf-word)
+      (buffer-string))))
+  ;; Barf two last words.
+  (should
+   (string=
+    "Org's \[\[http://orgmode.org/\]\] website is"
+    (org-test-with-temp-text
+        "Org's <point>\[\[http://orgmode.org/\]\[website is\]\]"
+      (org-link-edit-forward-barf-word 2)
+      (buffer-string))))
+  ;; Barf one word, not last.
+  (should
+   (string=
+    "Org's \[\[http://orgmode.org/\]\[website\]\] is"
+    (org-test-with-temp-text
+        "Org's <point>\[\[http://orgmode.org/\]\[website is\]\]"
+      (org-link-edit-forward-barf-word 1)
+      (buffer-string))))
+  ;; Barf beyond the number of present words.
+  (should-error
+   (org-test-with-temp-text
+       "Org's <point>\[\[http://orgmode.org/\]\[website is\]\]"
+     (org-link-edit-forward-barf-word 3)
+     (buffer-string))
+   :type (list 'user-error)))
+
+(ert-deftest test-org-link-edit/backward-barf-word ()
+  "Test `org-link-edit-backward-barf-word'."
+  ;; Barf last word.
+  (should
+   (string=
+    "Org's website \[\[http://orgmode.org/\]\] is"
+    (org-test-with-temp-text
+        "Org's <point>\[\[http://orgmode.org/\]\[website\]\] is"
+      (org-link-edit-backward-barf-word)
+      (buffer-string))))
+  ;; Barf two last words.
+  (should
+   (string=
+    "Org's website is \[\[http://orgmode.org/\]\]"
+    (org-test-with-temp-text
+        "Org's <point>\[\[http://orgmode.org/\]\[website is\]\]"
+      (org-link-edit-backward-barf-word 2)
+      (buffer-string))))
+  ;; Barf one word, not last.
+  (should
+   (string=
+    "Org's website \[\[http://orgmode.org/\]\[is\]\]"
+    (org-test-with-temp-text
+        "Org's <point>\[\[http://orgmode.org/\]\[website is\]\]"
+      (org-link-edit-backward-barf-word 1)
+      (buffer-string))))
+  ;; Barf beyond the number of present words.
+  (should-error
+   (org-test-with-temp-text
+       "Org's <point>\[\[http://orgmode.org/\]\[website is\]\]"
+     (org-link-edit-backward-barf-word 3)
+     (buffer-string))
+   :type (list 'user-error)))
+
+(ert-deftest test-org-link-edit/barf-negative-argument ()
+  "Test `org-link-edit-forward-barf-word' and
+`org-link-edit-backward-barf-word' with negative arguments."
+  (should
+   (string=
+    (org-test-with-temp-text
+        "Here is <point>\[\[http://orgmode.org/\]\[Org's\]\] website"
+      (org-link-edit-forward-barf-word 1)
+      (buffer-string))
+    (org-test-with-temp-text
+        "Here is <point>\[\[http://orgmode.org/\]\[Org's\]\] website"
+      (org-link-edit-backward-barf-word -1)
+      (buffer-string))))
+  (should
+   (string=
+    (org-test-with-temp-text
+        "Here is <point>\[\[http://orgmode.org/\]\[Org's\]\] website"
+      (org-link-edit-forward-barf-word -1)
+      (buffer-string))
+    (org-test-with-temp-text
+        "Here is <point>\[\[http://orgmode.org/\]\[Org's\]\] website"
+      (org-link-edit-backward-barf-word)
+      (buffer-string)))))
+
+
+;;; Slurp and Barf round trip
+;;
+;; Slurping and barfing should round trip unless there are new lines
+;; in the slurped string, which slurping replaces with spaces.
+
+(ert-deftest test-org-link-edit/slurp-barf-round-trip ()
+  "Test `org-link-edit-forward-barf-word' and
+`org-link-edit-backward-barf-word' reversibility."
+  (should
+   (string= "Here is \[\[http://orgmode.org/\]\[Org's\]\] website"
+            (org-test-with-temp-text
+                "Here is <point>\[\[http://orgmode.org/\]\[Org's\]\] website"
+              (org-link-edit-forward-barf-word 1)
+              (org-link-edit-forward-slurp-word 1)
+              (buffer-string))))
+  (string= "Here is \[\[http://orgmode.org/\]\[Org's\]\] website"
+           (org-test-with-temp-text
+               "Here is <point>\[\[http://orgmode.org/\]\[Org's\]\] website"
+             (org-link-edit-forward-slurp-word 1)
+             (org-link-edit-forward-barf-word 1)
+             (buffer-string)))
+  (should
+   (string= "Here is \[\[http://orgmode.org/\]\[Org's\]\] website"
+            (org-test-with-temp-text
+                "Here is <point>\[\[http://orgmode.org/\]\[Org's\]\] website"
+              (org-link-edit-backward-barf-word 1)
+              (org-link-edit-backward-slurp-word 1)
+              (buffer-string))))
+  (should
+   (string= "Here is \[\[http://orgmode.org/\]\[Org's\]\] website"
+            (org-test-with-temp-text
+                "Here is <point>\[\[http://orgmode.org/\]\[Org's\]\] website"
+              (org-link-edit-backward-slurp-word 1)
+              (org-link-edit-backward-barf-word 1)
+              (buffer-string)))))
+
+
+;;; Other
+
+(ert-deftest test-org-link-edit/get-link-data ()
+  "Test `org-link-edit--get-link-data'."
+  ;; Plain link
+  (cl-multiple-value-bind (beg end link desc)
+      (org-test-with-temp-text "http://orgmode.org/"
+        (org-link-edit--get-link-data))
+    (should (string= link "http://orgmode.org/"))
+    (should-not desc))
+  ;; Bracket link
+  (cl-multiple-value-bind (beg end link desc)
+      (org-test-with-temp-text  "\[\[http://orgmode.org/\]\[org\]\]"
+        (org-link-edit--get-link-data))
+    (should (string= link "http://orgmode.org/"))
+    (should (string= desc "org"))))
+
+(ert-deftest test-org-link-edit/split-first-words ()
+  "Test `org-link-edit--split-first-words'."
+  ;; Single word, n = 1
+  (should (equal '("one" . "")
+                 (org-link-edit--split-first-words "one" 1)))
+  ;; Single word, out-of-bounds
+  (should (equal '("one" . nil)
+                 (org-link-edit--split-first-words "one" 2)))
+  ;; Multiple words, n = 1
+  (should (equal '("one " . "two three")
+                 (org-link-edit--split-first-words "one two three" 1)))
+  ;; Multiple words, n > 1
+  (should (equal '("one two " . "three")
+                 (org-link-edit--split-first-words "one two three" 2))))
+
+(ert-deftest test-org-link-edit/split-last-words ()
+  "Test `org-link-edit--split-last-words'."
+  ;; Single word, n = 1
+  (should (equal '("" . "one")
+                 (org-link-edit--split-last-words "one" 1)))
+  ;; Single word, out-of-bounds
+  (should (equal '(nil . "one")
+                 (org-link-edit--split-last-words "one" 2)))
+  ;; Multiple words, n = 1
+  (should (equal '("one two" . " three")
+                 (org-link-edit--split-last-words "one two three" 1)))
+  ;; Multiple words, n > 1
+  (should (equal '("one" . " two three")
+                 (org-link-edit--split-last-words "one two three" 2))))
+
+(provide 'test-org-link-edit)
+;;; test-org-link-edit.el ends here