Log error for servicecall without required data

* Log error for services called without required attributes, in
	media_player, notify and thermostat platforms.
* Add fan property and methods in thermostat demo component.
* Add tests for notify file and thermostat demo component.
* Increase coverage of tests for media_player, notify and thermostat
	platforms.
* Fix some PEP issues, but not all. Tests still have old linting
	errors.

tests/components/notify/test_file.py

@@ -0,0 +1,56 @@
+"""The tests for the notify file platform."""
+import os
+import unittest
+import tempfile
+
+import homeassistant.components.notify as notify
+from homeassistant.components.notify import (
+    ATTR_TITLE_DEFAULT)
+import homeassistant.util.dt as dt_util
+
+from tests.common import get_test_home_assistant
+
+
+class TestNotifyFile(unittest.TestCase):
+    """Test the file notify."""
+
+    def setUp(self):  # pylint: disable=invalid-name
+        """Setup things to be run when tests are started."""
+        self.hass = get_test_home_assistant()
+
+    def tearDown(self):  # pylint: disable=invalid-name
+        """"Stop down everything that was started."""
+        self.hass.stop()
+
+    def test_bad_config(self):
+        """Test set up the platform with bad/missing config."""
+        self.assertFalse(notify.setup(self.hass, {
+            'notify': {
+                'name': 'test',
+                'platform': 'file',
+            }
+        }))
+
+    def test_notify_file(self):
+        """Test the notify file output."""
+        with tempfile.TemporaryDirectory() as tempdirname:
+            filename = os.path.join(tempdirname, 'notify.txt')
+            message = 'one, two, testing, testing'
+            self.assertTrue(notify.setup(self.hass, {
+                'notify': {
+                    'name': 'test',
+                    'platform': 'file',
+                    'filename': filename,
+                    'timestamp': 0
+                }
+            }))
+            title = '{} notifications (Log started: {})\n{}\n'.format(
+                ATTR_TITLE_DEFAULT,
+                dt_util.strip_microseconds(dt_util.utcnow()),
+                '-' * 80)
+
+            self.hass.services.call('notify', 'test', {'message': message},
+                                    blocking=True)
+
+            result = open(filename).read()
+            self.assertEqual(result, "{}{}\n".format(title, message))