Relaxes the configuration options for influxdb (#3869)

* Relaxes the configuration options for influxdb

By default influxdb allows unauthenticated access
Home Assistant required at least username and password to be present to properly submit data to influxdb

* Removes unused import of 'copy'

The copy module was used only in the removed test case responsible for testing the missing keys

* Updates InfluxDB config schema to require user and password

Current InfluxDB (v 1.0) can work without any authentication, but when authentication is enabled both username and password should be set.

* Removes extra white space in test_influxdb.py

homeassistant/components/influxdb.py

@@ -33,8 +33,8 @@ TIMEOUT = 5
 CONFIG_SCHEMA = vol.Schema({
     DOMAIN: vol.Schema({
         vol.Optional(CONF_HOST, default=DEFAULT_HOST): cv.string,
-        vol.Required(CONF_USERNAME): cv.string,
-        vol.Required(CONF_PASSWORD): cv.string,
+        vol.Inclusive(CONF_USERNAME, 'authentication'): cv.string,
+        vol.Inclusive(CONF_PASSWORD, 'authentication'): cv.string,
         vol.Optional(CONF_BLACKLIST, default=[]):
             vol.All(cv.ensure_list, [cv.entity_id]),
         vol.Optional(CONF_DB_NAME, default=DEFAULT_DATABASE): cv.string,

tests/components/test_influxdb.py

@@ -1,5 +1,4 @@
 """The tests for the InfluxDB component."""
-import copy
 import unittest
 from unittest import mock
 
@@ -53,18 +52,23 @@ class TestInfluxDB(unittest.TestCase):
         self.assertEqual(EVENT_STATE_CHANGED,
                          self.hass.bus.listen.call_args_list[0][0][0])
 
-    def test_setup_missing_keys(self, mock_client):
-        """Test the setup with missing keys."""
+    def test_setup_minimal_config(self, mock_client):
+        """Tests the setup with minimal configuration."""
+        config = {
+            'influxdb': {}
+        }
+
+        assert setup_component(self.hass, influxdb.DOMAIN, config)
+
+    def test_setup_missing_password(self, mock_client):
+        """Test the setup with existing username and missing password."""
         config = {
             'influxdb': {
-                'username': 'user',
-                'password': 'pass',
+                'username': 'user'
             }
         }
-        for missing in config['influxdb'].keys():
-            config_copy = copy.deepcopy(config)
-            del config_copy['influxdb'][missing]
-            assert not setup_component(self.hass, influxdb.DOMAIN, config_copy)
+
+        assert not setup_component(self.hass, influxdb.DOMAIN, config)
 
     def test_setup_query_fail(self, mock_client):
         """Test the setup for query failures."""