fix tests and run all tests on "cmdeploy test"

tests/test_cmdeploy.py

@@ -1,25 +1,33 @@
+import os
+
 import pytest
 from deploy_chatmail.cmdeploy import get_parser, main
 from chatmaild.config import read_config
 
 
+@pytest.fixture(autouse=True)
+def _chdir(tmp_path):
+    old = os.getcwd()
+    os.chdir(tmp_path)
+    yield
+    os.chdir(old)
+
+
 class TestCmdline:
     def test_parser(self, capsys):
         parser = get_parser()
         parser.parse_args([])
         init = parser.parse_args(["init", "chat.example.org"])
-        update = parser.parse_args(["install"])
-        assert init and update
+        run = parser.parse_args(["run"])
+        assert init and run
 
-    def test_init(self, tmpdir):
-        tmpdir.chdir()
+    def test_init(self, tmp_path):
         main(["init", "chat.example.org"])
-        inipath = tmpdir.join("chatmail.ini")
+        inipath = tmp_path.joinpath("chatmail.ini")
         config = read_config(inipath.strpath)
         assert config.mailname == "chat.example.org"
 
-    def test_init_not_overwrite(self, tmpdir):
-        tmpdir.chdir()
+    def test_init_not_overwrite(self):
         main(["init", "chat.example.org"])
         with pytest.raises(SystemExit):
             main(["init", "chat.example.org"])