Add support for system health to GIOS integration (#43280)

* Add system health support

* Fix docstrings

* Change url to check

homeassistant/components/gios/strings.json

@@ -18,5 +18,10 @@
     "abort": {
       "already_configured": "[%key:common::config_flow::abort::already_configured_location%]"
     }
+  },
+  "system_health": {
+    "info": {
+      "can_reach_server": "Reach GIO\u015a server"
+    }
   }
 }

homeassistant/components/gios/system_health.py

@@ -0,0 +1,20 @@
+"""Provide info to system health."""
+from homeassistant.components import system_health
+from homeassistant.core import HomeAssistant, callback
+
+API_ENDPOINT = "http://api.gios.gov.pl/"
+
+
+@callback
+def async_register(
+    hass: HomeAssistant, register: system_health.SystemHealthRegistration
+) -> None:
+    """Register system health callbacks."""
+    register.async_register_info(system_health_info)
+
+
+async def system_health_info(hass):
+    """Get info for the info page."""
+    return {
+        "can_reach_server": system_health.async_check_can_reach_url(hass, API_ENDPOINT)
+    }

tests/components/gios/test_system_health.py

@@ -0,0 +1,39 @@
+"""Test GIOS system health."""
+import asyncio
+
+from aiohttp import ClientError
+
+from homeassistant.components.gios.const import DOMAIN
+from homeassistant.setup import async_setup_component
+
+from tests.common import get_system_health_info
+
+
+async def test_gios_system_health(hass, aioclient_mock):
+    """Test GIOS system health."""
+    aioclient_mock.get("http://api.gios.gov.pl/", text="")
+    hass.config.components.add(DOMAIN)
+    assert await async_setup_component(hass, "system_health", {})
+
+    info = await get_system_health_info(hass, DOMAIN)
+
+    for key, val in info.items():
+        if asyncio.iscoroutine(val):
+            info[key] = await val
+
+    assert info == {"can_reach_server": "ok"}
+
+
+async def test_gios_system_health_fail(hass, aioclient_mock):
+    """Test GIOS system health."""
+    aioclient_mock.get("http://api.gios.gov.pl/", exc=ClientError)
+    hass.config.components.add(DOMAIN)
+    assert await async_setup_component(hass, "system_health", {})
+
+    info = await get_system_health_info(hass, DOMAIN)
+
+    for key, val in info.items():
+        if asyncio.iscoroutine(val):
+            info[key] = await val
+
+    assert info == {"can_reach_server": {"type": "failed", "error": "unreachable"}}