feat: simplify memoized_func (#19905)

tests/unit_tests/utils/cache_test.py

@@ -0,0 +1,52 @@
+# -*- coding: utf-8 -*-
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+# pylint: disable=import-outside-toplevel, unused-argument
+
+from pytest_mock import MockerFixture
+
+
+def test_memoized_func(app_context: None, mocker: MockerFixture) -> None:
+    """
+    Test the ``memoized_func`` decorator.
+    """
+    from superset.utils.cache import memoized_func
+
+    cache = mocker.MagicMock()
+
+    decorator = memoized_func("db:{self.id}:schema:{schema}:view_list", cache)
+    decorated = decorator(lambda self, schema, cache=False: 42)
+
+    self = mocker.MagicMock()
+    self.id = 1
+
+    # skip cache
+    result = decorated(self, "public", cache=False)
+    assert result == 42
+    cache.get.assert_not_called()
+
+    # check cache, no cached value
+    cache.get.return_value = None
+    result = decorated(self, "public", cache=True)
+    assert result == 42
+    cache.get.assert_called_with("db:1:schema:public:view_list")
+
+    # check cache, cached value
+    cache.get.return_value = 43
+    result = decorated(self, "public", cache=True)
+    assert result == 43