Add unit test suite.

.travis.yml

@@ -19,8 +19,8 @@ before_install:
 
 install:
   - cask install
-  
+
 script:
   - emacs --version
-  - pwd
-  - cask build 
+  - cask exec ert-runner
+  - cask build

test/doom-modeline-test.el

@@ -0,0 +1,70 @@
+;;; doom-modeline-test.el --- Unit tests for doom-modeline -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2018 Vincent Zhang
+
+;; Author: Vincent Zhang <seagle0128@gmail.com>
+;; Homepage: https://github.com/seagle0128/doom-modeline
+
+;; 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 2, 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; see the file COPYING.  If not, write to
+;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth
+;; Floor, Boston, MA 02110-1301, USA.
+;;
+
+;;; Commentary:
+;;
+;;  Unit tests for doom-modeline.
+;;
+
+;;; Code:
+
+(ert-deftest doom-modeline--buffer-file-name/truncate-upto-project ()
+  (let ((default-directory "/home/user/project/")
+        (file-path "/home/user/project/relative/test.txt")
+        (true-file-path nil))
+    (should
+     (string= (strip-text-properties
+               (doom-modeline--buffer-file-name file-path true-file-path 'shrink))
+              "/h/u/project/relative/test.txt"))))
+
+(ert-deftest doom-modeline--buffer-file-name/truncate-from-project ()
+  (let ((default-directory "/home/user/project/")
+        (file-path "/home/user/project/relative/test.txt")
+        (true-file-path nil))
+    (should
+     (string= (strip-text-properties
+               (doom-modeline--buffer-file-name file-path true-file-path nil 'shrink))
+              "/home/user/project/r/test.txt"))))
+
+(ert-deftest doom-modeline--buffer-file-name/truncate-with-project ()
+  (let ((default-directory "/home/user/project/")
+        (file-path "/home/user/project/relative/test.txt")
+        (true-file-path nil))
+    (should
+     (string= (strip-text-properties
+               (doom-modeline--buffer-file-name file-path true-file-path 'shrink 'shrink 'hide))
+              "project/r/test.txt"))))
+
+(ert-deftest doom-modeline--buffer-file-name/truncate-except-project ()
+  (let ((default-directory "/home/user/project/")
+        (file-path "/home/user/project/relative/test.txt")
+        (true-file-path nil))
+    (should
+     (string= (strip-text-properties
+               (doom-modeline--buffer-file-name file-path true-file-path 'shrink 'shrink))
+              "/h/u/project/r/test.txt"))))
+
+;;; doom-modeline-test.el ends here

test/test-helper.el

@@ -0,0 +1,41 @@
+;;; test-helper.el --- Helpers for doom-modeline-test.el -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2018 Vincent Zhang
+
+;; Author: Vincent Zhang <seagle0128@gmail.com>
+;; Homepage: https://github.com/seagle0128/doom-modeline
+
+;; 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 2, 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; see the file COPYING.  If not, write to
+;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth
+;; Floor, Boston, MA 02110-1301, USA.
+;;
+
+;;; Commentary:
+;;
+;;  Helpers for doom-modeline-test.el
+;;
+;;; Code:
+
+(require 'doom-modeline (expand-file-name "doom-modeline.el"))
+(require 'ert)
+
+(defun strip-text-properties(txt)
+  "Strip text properties of TXT."
+  (set-text-properties 0 (length txt) nil txt)
+  txt)
+
+;;; test-helper.el ends here