Zone component config entry support (#14059)

* Initial commit

* Add error handling to config flow
Change unique identifyer to name
Clean up hound comments

* Ensure hass home zone is created with correct entity id
Fix failing tests

* Fix rest of tests

* Move zone tests to zone folder
Create config flow tests

* Add possibility to unload entry

* Use hass.data instead of globas

* Don't calculate configures zones every loop iteration

* No need to know about home zone during setup of entry

* Only use name as title

* Don't cache hass home zone

* Add new tests for setup and setup entry

* Break out functionality from init to zone.py

* Make hass home zone be created directly

* Make sure that config flow doesn't override hass home zone

* A newline was missing in const

* Configured zones shall not be imported
Removed config flow import functionality
Improved tests

tests/components/zone/test_config_flow.py

@@ -0,0 +1,55 @@
+"""Tests for zone config flow."""
+
+from homeassistant.components.zone import config_flow
+from homeassistant.components.zone.const import CONF_PASSIVE, DOMAIN, HOME_ZONE
+from homeassistant.const import (
+    CONF_NAME, CONF_LATITUDE, CONF_LONGITUDE, CONF_ICON, CONF_RADIUS)
+
+from tests.common import MockConfigEntry
+
+
+async def test_flow_works(hass):
+    """Test that config flow works."""
+    flow = config_flow.ZoneFlowHandler()
+    flow.hass = hass
+
+    result = await flow.async_step_init(user_input={
+        CONF_NAME: 'Name',
+        CONF_LATITUDE: '1.1',
+        CONF_LONGITUDE: '2.2',
+        CONF_RADIUS: '100',
+        CONF_ICON: 'mdi:home',
+        CONF_PASSIVE: True
+        })
+
+    assert result['type'] == 'create_entry'
+    assert result['title'] == 'Name'
+    assert result['data'] == {
+        CONF_NAME: 'Name',
+        CONF_LATITUDE: '1.1',
+        CONF_LONGITUDE: '2.2',
+        CONF_RADIUS: '100',
+        CONF_ICON: 'mdi:home',
+        CONF_PASSIVE: True
+    }
+
+
+async def test_flow_requires_unique_name(hass):
+    """Test that config flow verifies that each zones name is unique."""
+    MockConfigEntry(domain=DOMAIN, data={
+        CONF_NAME: 'Name'
+    }).add_to_hass(hass)
+    flow = config_flow.ZoneFlowHandler()
+    flow.hass = hass
+
+    result = await flow.async_step_init(user_input={CONF_NAME: 'Name'})
+    assert result['errors'] == {'base': 'name_exists'}
+
+
+async def test_flow_requires_name_different_from_home(hass):
+    """Test that config flow verifies that each zones name is unique."""
+    flow = config_flow.ZoneFlowHandler()
+    flow.hass = hass
+
+    result = await flow.async_step_init(user_input={CONF_NAME: HOME_ZONE})
+    assert result['errors'] == {'base': 'name_exists'}