Move imports in melissa component (#28021)

* Move imports in melissa component

* Fix tox tests

homeassistant/components/melissa/__init__.py

@@ -1,9 +1,10 @@
 """Support for Melissa climate."""
 import logging
 
+import melissa
 import voluptuous as vol
 
-from homeassistant.const import CONF_USERNAME, CONF_PASSWORD
+from homeassistant.const import CONF_PASSWORD, CONF_USERNAME
 from homeassistant.helpers import config_validation as cv
 from homeassistant.helpers.discovery import async_load_platform
 
@@ -28,8 +29,6 @@ CONFIG_SCHEMA = vol.Schema(
 
 async def async_setup(hass, config):
     """Set up the Melissa Climate component."""
-    import melissa
-
     conf = config[DOMAIN]
     username = conf.get(CONF_USERNAME)
     password = conf.get(CONF_PASSWORD)

tests/components/melissa/test_init.py

@@ -1,14 +1,15 @@
 """The test for the Melissa Climate component."""
-from tests.common import MockDependency, mock_coro_func
-
 from homeassistant.components import melissa
 
+from tests.common import MockDependency, mock_coro_func
+
 VALID_CONFIG = {"melissa": {"username": "********", "password": "********"}}
 
 
 async def test_setup(hass):
     """Test setting up the Melissa component."""
     with MockDependency("melissa") as mocked_melissa:
+        melissa.melissa = mocked_melissa
         mocked_melissa.AsyncMelissa().async_connect = mock_coro_func()
         await melissa.async_setup(hass, VALID_CONFIG)