Fix zero-argument functions with as_function (home-assistant#150062)

Author: depoll

homeassistant/helpers/template.py

@@ -2030,7 +2030,7 @@ def apply(value, fn, *args, **kwargs):
 def as_function(macro: jinja2.runtime.Macro) -> Callable[..., Any]:
     """Turn a macro with a 'returns' keyword argument into a function that returns what that argument is called with."""
 
-    def wrapper(value, *args, **kwargs):
+    def wrapper(*args, **kwargs):
         return_value = None
 
         def returns(value):
@@ -2039,7 +2039,7 @@ def returns(value):
             return value
 
         # Call the callable with the value and other args
-        macro(value, *args, **kwargs, returns=returns)
+        macro(*args, **kwargs, returns=returns)
         return return_value
 
     # Remove "macro_" from the macro's name to avoid confusion in the wrapper's name

tests/helpers/test_template.py

@@ -845,6 +845,23 @@ def test_as_function(hass: HomeAssistant) -> None:
     )
 
 
+def test_as_function_no_arguments(hass: HomeAssistant) -> None:
+    """Test as_function with no arguments."""
+    assert (
+        template.Template(
+            """
+            {%- macro macro_get_hello(returns) -%}
+            {%- do returns("Hello") -%}
+            {%- endmacro -%}
+            {%- set get_hello = macro_get_hello | as_function -%}
+            {{ get_hello() }}
+            """,
+            hass,
+        ).async_render()
+        == "Hello"
+    )
+
+
 def test_logarithm(hass: HomeAssistant) -> None:
     """Test logarithm."""
     tests = [