Add time component to Melnor Bluetooth integration (#93652)

* Add time component to Melnor Bluetooth integration

* Apply suggestions from code review

---------

Co-authored-by: Paulus Schoutsen <paulus@home-assistant.io>

tests/components/melnor/test_time.py

@@ -0,0 +1,50 @@
+"""Test the Melnor time platform."""
+from __future__ import annotations
+
+from datetime import time
+
+from homeassistant.core import HomeAssistant
+import homeassistant.util.dt as dt_util
+
+from .conftest import (
+    mock_config_entry,
+    patch_async_ble_device_from_address,
+    patch_async_register_callback,
+    patch_melnor_device,
+)
+
+from tests.common import async_fire_time_changed
+
+
+async def test_schedule_start_time(hass: HomeAssistant) -> None:
+    """Test the frequency schedule start time."""
+
+    now = dt_util.now()
+
+    entry = mock_config_entry(hass)
+
+    with patch_async_ble_device_from_address(), patch_melnor_device() as device_patch, patch_async_register_callback():
+        device = device_patch.return_value
+
+        assert await hass.config_entries.async_setup(entry.entry_id)
+        await hass.async_block_till_done()
+
+        time_entity = hass.states.get("time.zone_1_schedule_start_time")
+
+        assert time_entity is not None
+        assert time_entity.state == device.zone1.frequency.start_time.isoformat()
+
+        await hass.services.async_call(
+            "time",
+            "set_value",
+            {"entity_id": "time.zone_1_schedule_start_time", "time": time(1, 0)},
+            blocking=True,
+        )
+
+        async_fire_time_changed(hass, now + dt_util.dt.timedelta(seconds=10))
+        await hass.async_block_till_done()
+
+        time_entity = hass.states.get("time.zone_1_schedule_start_time")
+
+        assert time_entity is not None
+        assert time_entity.state == time(1, 0).isoformat()