Add diagnostics platform to Reolink (#104378)

tests/components/reolink/test_diagnostics.py

@@ -0,0 +1,25 @@
+"""Test Reolink diagnostics."""
+
+from unittest.mock import MagicMock
+
+from syrupy.assertion import SnapshotAssertion
+
+from homeassistant.core import HomeAssistant
+
+from tests.common import MockConfigEntry
+from tests.components.diagnostics import get_diagnostics_for_config_entry
+from tests.typing import ClientSessionGenerator
+
+
+async def test_entry_diagnostics(
+    hass: HomeAssistant,
+    hass_client: ClientSessionGenerator,
+    reolink_connect: MagicMock,
+    config_entry: MockConfigEntry,
+    snapshot: SnapshotAssertion,
+) -> None:
+    """Test Reolink diagnostics."""
+    assert await hass.config_entries.async_setup(config_entry.entry_id)
+    await hass.async_block_till_done()
+    diag = await get_diagnostics_for_config_entry(hass, hass_client, config_entry)
+    assert diag == snapshot