Adding patch for webbrowser on macOS

tests/test_objects.py

@@ -5,13 +5,15 @@ import time
 import curses
 from collections import OrderedDict
 
+import os
 import six
 import pytest
 import requests
+from six.moves import reload_module
 
 from rtv import exceptions
 from rtv.objects import Color, Controller, Navigator, Command, KeyMap, \
-    curses_session
+    curses_session, patch_webbrowser
 
 try:
     from unittest import mock
@@ -19,6 +21,28 @@ except ImportError:
     import mock
 
 
+@mock.patch.dict(os.environ, {'BROWSER': 'safari'})
+@mock.patch('sys.platform', 'darwin')
+@mock.patch('shutil.which', return_value=None)    # py3 method
+@mock.patch('os.path.isfile', return_value=None)  # py2 method
+def test_patch_webbrowser(which, isfile):
+
+    # Make sure that webbrowser re-generates the browser list using the
+    # mocked environment
+    import webbrowser
+    webbrowser = reload_module(webbrowser)
+
+    # By default, we expect that BROWSER will be loaded as a generic browser
+    # This is because "safari" is not a valid script in the system PATH
+    assert isinstance(webbrowser.get(), webbrowser.GenericBrowser)
+
+    # After patching, the default webbrowser should now be interpreted as an
+    # OSAScript browser
+    patch_webbrowser()
+    assert isinstance(webbrowser.get(), webbrowser.MacOSXOSAScript)
+    assert webbrowser._tryorder[0] == 'safari'
+
+
 @pytest.mark.parametrize('use_ascii', [True, False])
 def test_objects_load_screen(terminal, stdscr, use_ascii):
     terminal.config['ascii'] = use_ascii