Respect kwargs when args_to_ignore is set in memoize (#558)

* Respect kwargs when args_to_ignore is set in memoize

* Rename test method

* Change test value of b to a different one

Author: ivtoskov

src/flask_caching/__init__.py

@@ -650,7 +650,7 @@ def _memoize_kwargs_to_args(self, f: Callable, *args, **kwargs) -> Any:
 
         # If the function uses VAR_KEYWORD type of parameters,
         # we need to pass these further
-        kw_keys_remaining = list(kwargs.keys())
+        kw_keys_remaining = [key for key in kwargs.keys() if key not in args_to_ignore]
         arg_names = get_arg_names(f)
         args_len = len(arg_names)
 

tests/test_memoize.py

@@ -834,3 +834,12 @@ def big_foo(self, a, b):
                 return a + b + random.randrange(0, 100000)
 
         assert Foo().big_foo(5, 2) == Foo().big_foo(5, 2)
+
+
+def test_memoize_function_ignore_kwarg(app, cache):
+    with app.test_request_context():
+        @cache.memoize(50, args_to_ignore=["b"])
+        def big_foo(a, b):
+            return a + b + random.randrange(0, 100000)
+
+        assert big_foo(5, 2) == big_foo(5, b=3)