Diagnostics: add some basic unit tests.

To make sonarscan happy about new code coverage.

tests/test_diagnostics.py

@@ -0,0 +1,46 @@
+"""Tests for diagnostics platform"""
+from pytest_homeassistant_custom_component.common import MockConfigEntry
+from unittest.mock import AsyncMock, Mock
+
+from custom_components.tuya_local.const import (
+    DOMAIN,
+    CONF_DEVICE_ID,
+    CONF_LOCAL_KEY,
+    CONF_TYPE,
+)
+
+from custom_components.tuya_local.diagnostics import (
+    async_get_config_entry_diagnostics,
+    async_get_device_diagnostics,
+)
+
+
+async def test_config_entry_diagnostics(hass):
+    entry = MockConfigEntry(
+        domain=DOMAIN,
+        data={
+            CONF_DEVICE_ID: "test_device",
+            CONF_LOCAL_KEY: "test_key",
+            CONF_TYPE: "simple_switch",
+        },
+    )
+    m_device = AsyncMock()
+    hass.data[DOMAIN] = {"test_device": {"device": m_device}}
+    diag = await async_get_config_entry_diagnostics(hass, entry)
+    assert diag
+
+
+async def test_device_diagnostics(hass):
+    entry = MockConfigEntry(
+        domain=DOMAIN,
+        data={
+            CONF_DEVICE_ID: "test_device",
+            CONF_LOCAL_KEY: "test_key",
+            CONF_TYPE: "simple_switch",
+        },
+    )
+    m_device = AsyncMock()
+    hass.data[DOMAIN] = {"test_device": {"device": m_device}}
+    diag = await async_get_device_diagnostics(hass, entry, m_device)
+
+    assert diag