Adding support for emacs terminals

rtv/page.py

@@ -367,7 +367,9 @@ class Page(object):
         else:
             title = sub_name
 
-        if os.getenv('DISPLAY'):
+        # Setting the terminal title will break emacs or systems without
+        # X window.
+        if os.getenv('DISPLAY') and not os.getenv('INSIDE_EMACS'):
             title += ' - rtv {0}'.format(__version__)
             title = self.term.clean(title)
             if six.PY3:

tests/test_subreddit.py

@@ -108,6 +108,11 @@ def test_subreddit_title(subreddit_page, terminal, capsys):
         out, _ = capsys.readouterr()
         assert not out
 
+    with mock.patch.dict('os.environ', {'INSIDE_EMACS': '25.3.1,term:0.96'}):
+        subreddit_page.draw()
+        out, _ = capsys.readouterr()
+        assert not out
+
 
 def test_subreddit_search(subreddit_page, terminal):
     window = terminal.stdscr.subwin

tests/test_terminal.py

@@ -600,6 +600,7 @@ def test_set_theme(terminal, stdscr):
 
 def test_set_theme_no_colors(terminal, stdscr):
 
+    # Monochrome should be forced if the terminal doesn't support color
     with mock.patch('curses.has_colors') as has_colors:
         has_colors.return_value = False