Add diagnostic platform and tests to Blink (#102650)

Co-authored-by: J. Nick Koston <nick@koston.org>

tests/components/blink/test_diagnostics.py

@@ -0,0 +1,33 @@
+"""Test Blink diagnostics."""
+from unittest.mock import MagicMock
+
+from syrupy import SnapshotAssertion
+from syrupy.filters import props
+
+from homeassistant.core import HomeAssistant
+
+from tests.components.diagnostics import get_diagnostics_for_config_entry
+from tests.typing import ClientSessionGenerator
+
+YAML_CONFIG = {"username": "test-user", "password": "test-password"}
+
+
+async def test_entry_diagnostics(
+    hass: HomeAssistant,
+    hass_client: ClientSessionGenerator,
+    snapshot: SnapshotAssertion,
+    mock_blink_api: MagicMock,
+    mock_config_entry: MagicMock,
+) -> None:
+    """Test config entry diagnostics."""
+
+    mock_config_entry.add_to_hass(hass)
+
+    await hass.config_entries.async_setup(mock_config_entry.entry_id)
+    await hass.async_block_till_done()
+
+    result = await get_diagnostics_for_config_entry(
+        hass, hass_client, mock_config_entry
+    )
+
+    assert result == snapshot(exclude=props("entry_id"))