Add platform and sensors for Vultr VPS (#9928)

* Initial commit of Vultr components

Have a working Vultr hub and binary sensor which pulls down the
following attributes of your VPS:
 - Date created
 - Subscription id (server id)
 - Cost per month (in US$)
 - Operating System installed
 - IPv4 address
 - label (human readable name)
 - region
 - number of vcpus
 - which storage package chosen
 - IPV6 address (if applicable)
 - RAM amount

Working next on sensor and then testing / coverage.

* Added Vultr sensor for pending charges and current bandwidth. Refactored binary_sensor and hub too

* Corrected is_on bases

* Added basic tests for Vultr binary & platform

* Updated require files

* Changing test fixture to highlight different cases

* Written basic test for sensor.vultr

* Resolved linting errors and broken test

* Increase test coverage and corrected docs

* Resolved hound issues

* Revert back negative binary test

* Another hound resolve

* Refactoring and adding is switch, moving over to vultr branch

* Made Vultr components more resiliant to invalid configs

* Added negetive test for vultr binary sensor

* Added better testing of vultr sensor

* Resolved vultr platform test affecting subsequent vultr tests

* Moving VULTR components to single use design

* Added in sensor name config

* Added missing sensors var

* Resolved init data setting of sensors, added in name conf to switch

* Made the Vultr component more resiliant to startup failure with better alerting

* Various Vultr component changes

- Refactored sensor, binary_sensor, and switch to reference one subscription
- Renamed CURRENT_BANDWIDTH_GB monitored condition to CURRENT_BANDWIDTH_USED
- Improved test coverage

* Resolved local tox linting issue

* Added more testing for Vultr switch

* Improved test coverage for Vultr components

* Made PR comment changes to vultr binary sensor

* Made PR comment changes to Vultr sensor

* resolved PR comments for Vultr Switch

* Resolved vultr sensor name and improved tests

* Improved Vultr switch testing (default name formatting)

* Removed vultr hub failure checking

tests/components/test_vultr.py

@@ -0,0 +1,48 @@
+"""The tests for the Vultr component."""
+import unittest
+import requests_mock
+
+from copy import deepcopy
+from homeassistant import setup
+import components.vultr as vultr
+
+from tests.common import (
+    get_test_home_assistant, load_fixture)
+
+VALID_CONFIG = {
+    'vultr': {
+        'api_key': 'ABCDEFG1234567'
+    }
+}
+
+
+class TestVultr(unittest.TestCase):
+    """Tests the Vultr component."""
+
+    def setUp(self):
+        """Initialize values for this test case class."""
+        self.hass = get_test_home_assistant()
+        self.config = VALID_CONFIG
+
+    def tearDown(self):  # pylint: disable=invalid-name
+        """Stop everything that we started."""
+        self.hass.stop()
+
+    @requests_mock.Mocker()
+    def test_setup(self, mock):
+        """Test successful setup."""
+        mock.get(
+            'https://api.vultr.com/v1/account/info?api_key=ABCDEFG1234567',
+            text=load_fixture('vultr_account_info.json'))
+        mock.get(
+            'https://api.vultr.com/v1/server/list?api_key=ABCDEFG1234567',
+            text=load_fixture('vultr_server_list.json'))
+
+        response = vultr.setup(self.hass, self.config)
+        self.assertTrue(response)
+
+    def test_setup_no_api_key(self):
+        """Test failed setup with missing API Key."""
+        conf = deepcopy(self.config)
+        del conf['vultr']['api_key']
+        assert not setup.setup_component(self.hass, vultr.DOMAIN, conf)