support exact matching has_session

See also: tmux-python/tmuxp#252

Author: tony

libtmux/server.py

@@ -314,17 +314,24 @@ def attached_sessions(self):
             Session(server=self, **s) for s in attached_sessions
         ] or None
 
-    def has_session(self, target_session):
+    def has_session(self, target_session, exact=True):
         """Return True if session exists. ``$ tmux has-session``.
 
-        :param: target_session: str of session name.
+        :param target_session: session name
+        :type target_session: str
+        :param exact: match the session name exactly.
+            tmux uses fnmatch by default. Internally prepends ``=`` to the
+            session in ``$ tmux has-session``.
+        :type exact: bool
         :raises: :exc:`exc.BadSessionName`
         :rtype: bool
 
         """
-
         session_check_name(target_session)
 
+        if exact:
+            target_session = '={}'.format(target_session)
+
         proc = self.cmd('has-session', '-t%s' % target_session)
 
         if not proc.stdout:

tests/test_session.py

@@ -17,6 +17,8 @@ def test_has_session(server, session):
     """Server.has_session returns True if has session_name exists."""
     TEST_SESSION_NAME = session.get('session_name')
     assert server.has_session(TEST_SESSION_NAME)
+    assert not server.has_session(TEST_SESSION_NAME[:-2])
+    assert server.has_session(TEST_SESSION_NAME[:-2], exact=False)
     assert not server.has_session('asdf2314324321')