Add random failing service

custom_components/spook/__init__.py

@@ -3,10 +3,12 @@
 from homeassistant.core import HomeAssistant
 
 from .const import PLATFORMS
+from .services import async_setup_services
 
 
 async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     """Set up from a config entry."""
+    async_setup_services(hass)
     await hass.config_entries.async_forward_entry_setups(entry, PLATFORMS)
     return True
 

custom_components/spook/config_flow.py

@@ -21,7 +21,7 @@ async def async_step_user(
     ) -> FlowResult:
         """Handle a flow initialized someone that didn't read the warnings."""
         if self._async_current_entries():
-            return self.async_abort(reason="single_instance_allowed")
+            return self.async_abort(reason="already_spooked")
 
         if user_input is not None:
             return self.async_create_entry(title="Not your homey", data={})

custom_components/spook/services.yaml

@@ -0,0 +1,3 @@
+random_fail:
+  name: Random fail
+  description: A call to this service will randomly fail.

custom_components/spook/services/__init__.py

@@ -0,0 +1,30 @@
+"""Spook - Not your homey."""
+import random
+
+from homeassistant.core import HomeAssistant, ServiceCall, callback
+from homeassistant.exceptions import HomeAssistantError
+from homeassistant.backports.enum import StrEnum
+
+from ..const import DOMAIN
+
+
+class SpookServices(StrEnum):
+    """Spook services."""
+
+    RANDOM_FAIL = "random_fail"
+
+
+@callback
+def async_setup_services(hass: HomeAssistant) -> None:
+    """Set up Spook services."""
+
+    async def _async_random_fail(_: ServiceCall) -> None:
+        """Randomly let this service call fail."""
+        if random.choice([True, False]):
+            raise HomeAssistantError("Spooked!")
+
+    hass.services.async_register(
+        DOMAIN,
+        SpookServices.RANDOM_FAIL,
+        _async_random_fail,
+    )

custom_components/spook/translations/en.json

@@ -1,7 +1,7 @@
 {
   "config": {
       "abort": {
-          "single_instance_allowed": "Yeah... well... no. K, thx, bye!"
+          "already_spooked": "Yeah... well... no. K, thx, bye!"
       },
       "step": {
           "user": {