Migrate template tests to use freezegun (#105341)

tests/components/template/test_button.py

@@ -1,6 +1,7 @@
 """The tests for the Template button platform."""
 import datetime as dt
-from unittest.mock import patch
+
+from freezegun.api import FrozenDateTimeFactory
 
 from homeassistant import setup
 from homeassistant.components.button import DOMAIN as BUTTON_DOMAIN, SERVICE_PRESS
@@ -59,7 +60,9 @@ async def test_missing_required_keys(hass: HomeAssistant) -> None:
     assert hass.states.async_all("button") == []
 
 
-async def test_all_optional_config(hass: HomeAssistant, calls) -> None:
+async def test_all_optional_config(
+    hass: HomeAssistant, freezer: FrozenDateTimeFactory, calls
+) -> None:
     """Test: including all optional templates is ok."""
     with assert_setup_component(1, "template"):
         assert await setup.async_setup_component(
@@ -98,14 +101,13 @@ async def test_all_optional_config(hass: HomeAssistant, calls) -> None:
     )
 
     now = dt.datetime.now(dt.UTC)
-
-    with patch("homeassistant.util.dt.utcnow", return_value=now):
-        await hass.services.async_call(
-            BUTTON_DOMAIN,
-            SERVICE_PRESS,
-            {CONF_ENTITY_ID: _TEST_OPTIONS_BUTTON},
-            blocking=True,
-        )
+    freezer.move_to(now)
+    await hass.services.async_call(
+        BUTTON_DOMAIN,
+        SERVICE_PRESS,
+        {CONF_ENTITY_ID: _TEST_OPTIONS_BUTTON},
+        blocking=True,
+    )
 
     assert len(calls) == 1
     assert calls[0].data["caller"] == _TEST_OPTIONS_BUTTON

tests/components/template/test_trigger.py

@@ -1,8 +1,8 @@
 """The tests for the Template automation."""
 from datetime import timedelta
 from unittest import mock
-from unittest.mock import patch
 
+from freezegun.api import FrozenDateTimeFactory
 import pytest
 
 import homeassistant.components.automation as automation
@@ -803,56 +803,56 @@ async def test_invalid_for_template_1(hass: HomeAssistant, start_ha, calls) -> N
         assert mock_logger.error.called
 
 
-async def test_if_fires_on_time_change(hass: HomeAssistant, calls) -> None:
+async def test_if_fires_on_time_change(
+    hass: HomeAssistant, freezer: FrozenDateTimeFactory, calls
+) -> None:
     """Test for firing on time changes."""
     start_time = dt_util.utcnow() + timedelta(hours=24)
     time_that_will_not_match_right_away = start_time.replace(minute=1, second=0)
-    with patch(
-        "homeassistant.util.dt.utcnow", return_value=time_that_will_not_match_right_away
-    ):
-        assert await async_setup_component(
-            hass,
-            automation.DOMAIN,
-            {
-                automation.DOMAIN: {
-                    "trigger": {
-                        "platform": "template",
-                        "value_template": "{{ utcnow().minute % 2 == 0 }}",
-                    },
-                    "action": {"service": "test.automation"},
-                }
-            },
-        )
-        await hass.async_block_till_done()
-        assert len(calls) == 0
+    freezer.move_to(time_that_will_not_match_right_away)
+    assert await async_setup_component(
+        hass,
+        automation.DOMAIN,
+        {
+            automation.DOMAIN: {
+                "trigger": {
+                    "platform": "template",
+                    "value_template": "{{ utcnow().minute % 2 == 0 }}",
+                },
+                "action": {"service": "test.automation"},
+            }
+        },
+    )
+    await hass.async_block_till_done()
+    assert len(calls) == 0
 
     # Trigger once (match template)
     first_time = start_time.replace(minute=2, second=0)
-    with patch("homeassistant.util.dt.utcnow", return_value=first_time):
-        async_fire_time_changed(hass, first_time)
-        await hass.async_block_till_done()
+    freezer.move_to(first_time)
+    async_fire_time_changed(hass, first_time)
+    await hass.async_block_till_done()
     assert len(calls) == 1
 
     # Trigger again (match template)
     second_time = start_time.replace(minute=4, second=0)
-    with patch("homeassistant.util.dt.utcnow", return_value=second_time):
-        async_fire_time_changed(hass, second_time)
-        await hass.async_block_till_done()
+    freezer.move_to(second_time)
+    async_fire_time_changed(hass, second_time)
+    await hass.async_block_till_done()
     await hass.async_block_till_done()
     assert len(calls) == 1
 
     # Trigger again (do not match template)
     third_time = start_time.replace(minute=5, second=0)
-    with patch("homeassistant.util.dt.utcnow", return_value=third_time):
-        async_fire_time_changed(hass, third_time)
-        await hass.async_block_till_done()
+    freezer.move_to(third_time)
+    async_fire_time_changed(hass, third_time)
+    await hass.async_block_till_done()
     await hass.async_block_till_done()
     assert len(calls) == 1
 
     # Trigger again (match template)
     forth_time = start_time.replace(minute=8, second=0)
-    with patch("homeassistant.util.dt.utcnow", return_value=forth_time):
-        async_fire_time_changed(hass, forth_time)
-        await hass.async_block_till_done()
+    freezer.move_to(forth_time)
+    async_fire_time_changed(hass, forth_time)
+    await hass.async_block_till_done()
     await hass.async_block_till_done()
     assert len(calls) == 2