Assert retry_after propagation in teslemetry coordinator retry tests (#181721)

tests/components/teslemetry/test_init.py

@@ -4,6 +4,7 @@ import asyncio
 from collections.abc import AsyncIterator
 from contextlib import asynccontextmanager
 from copy import deepcopy
+from datetime import timedelta
 import logging
 import time
 from types import MappingProxyType
@@ -686,6 +687,18 @@ async def test_energy_history_coordinator_retry_exceptions(
     # Entry stays loaded - UpdateFailed with retry_after doesn't break the entry
     assert entry.state is ConfigEntryState.LOADED
 
+    # The coordinator staggers its scheduling deliberately, so these ticks
+    # bracket retry_after with a margin either side rather than sitting on it.
+    freezer.tick(timedelta(seconds=expected_retry_after - 2))
+    async_fire_time_changed(hass)
+    await hass.async_block_till_done()
+    assert call_count == 1
+
+    freezer.tick(timedelta(seconds=3))
+    async_fire_time_changed(hass)
+    await hass.async_block_till_done()
+    assert call_count == 2
+
 
 async def test_live_status_auth_error(
     hass: HomeAssistant,