Fix command_template sensor value_template not being used if json_attributes set (#90603)

* Allow value_template to be used if json_attributes set

* Set state to None if no value_template and json_attributes used

* Refactor check for no value_template when json_attributes used

* Updated and additional unit test

* Updated to set _attr_native_value and return if value_template is None

* Update unit test docstring

* Updated test docstring based on feedback

homeassistant/components/command_line/sensor.py

@@ -137,8 +137,11 @@ class CommandSensor(SensorEntity):
                     _LOGGER.warning("Unable to parse output as JSON: %s", value)
             else:
                 _LOGGER.warning("Empty reply found when expecting JSON data")
+            if self._value_template is None:
+                self._attr_native_value = None
+                return
 
-        elif self._value_template is not None:
+        if self._value_template is not None:
             self._attr_native_value = (
                 self._value_template.async_render_with_possible_json_value(
                     value,

tests/components/command_line/test_sensor.py

@@ -169,6 +169,28 @@ async def test_update_with_json_attrs(hass: HomeAssistant) -> None:
     )
     entity_state = hass.states.get("sensor.test")
     assert entity_state
+    assert entity_state.state == "unknown"
+    assert entity_state.attributes["key"] == "some_json_value"
+    assert entity_state.attributes["another_key"] == "another_json_value"
+    assert entity_state.attributes["key_three"] == "value_three"
+
+
+async def test_update_with_json_attrs_and_value_template(hass: HomeAssistant) -> None:
+    """Test json_attributes can be used together with value_template."""
+    await setup_test_entities(
+        hass,
+        {
+            "command": (
+                'echo { \\"key\\": \\"some_json_value\\", \\"another_key\\": '
+                '\\"another_json_value\\", \\"key_three\\": \\"value_three\\" }'
+            ),
+            "json_attributes": ["key", "another_key", "key_three"],
+            "value_template": '{{ value_json["key"] }}',
+        },
+    )
+    entity_state = hass.states.get("sensor.test")
+    assert entity_state
+    assert entity_state.state == "some_json_value"
     assert entity_state.attributes["key"] == "some_json_value"
     assert entity_state.attributes["another_key"] == "another_json_value"
     assert entity_state.attributes["key_three"] == "value_three"