Improve raspberry_pi tests (#73269)

* Improve raspberry_pi tests

* Address review comments

tests/components/raspberry_pi/test_init.py

@@ -1,6 +1,8 @@
 """Test the Raspberry Pi integration."""
 from unittest.mock import patch
 
+import pytest
+
 from homeassistant.components.raspberry_pi.const import DOMAIN
 from homeassistant.config_entries import ConfigEntryState
 from homeassistant.core import HomeAssistant
@@ -8,6 +10,16 @@ from homeassistant.core import HomeAssistant
 from tests.common import MockConfigEntry, MockModule, mock_integration
 
 
+@pytest.fixture(autouse=True)
+def mock_rpi_power():
+    """Mock the rpi_power integration."""
+    with patch(
+        "homeassistant.components.rpi_power.async_setup_entry",
+        return_value=True,
+    ):
+        yield
+
+
 async def test_setup_entry(hass: HomeAssistant) -> None:
     """Test setup of a config entry."""
     mock_integration(hass, MockModule("hassio"))
@@ -20,14 +32,19 @@ async def test_setup_entry(hass: HomeAssistant) -> None:
         title="Raspberry Pi",
     )
     config_entry.add_to_hass(hass)
+    assert not hass.config_entries.async_entries("rpi_power")
     with patch(
         "homeassistant.components.raspberry_pi.get_os_info",
         return_value={"board": "rpi"},
-    ) as mock_get_os_info:
+    ) as mock_get_os_info, patch(
+        "homeassistant.components.rpi_power.config_flow.new_under_voltage"
+    ):
         assert await hass.config_entries.async_setup(config_entry.entry_id)
         await hass.async_block_till_done()
         assert len(mock_get_os_info.mock_calls) == 1
 
+    assert len(hass.config_entries.async_entries("rpi_power")) == 1
+
 
 async def test_setup_entry_wrong_board(hass: HomeAssistant) -> None:
     """Test setup of a config entry with wrong board type."""