[GitHub] [superset] ktmud commented on a diff in pull request #20842: feat: a simple LRUCache in frontend

[GitBox <gi...@apache.org>]

ktmud commented on code in PR #20842:
URL: https://github.com/apache/superset/pull/20842#discussion_r929069059


##########
superset-frontend/packages/superset-ui-core/test/utils/lruCache.test.ts:
##########
@@ -0,0 +1,57 @@
+/*
+ * 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.
+ */
+
+import { lruCache } from '@superset-ui/core';
+
+test('initial LRU', () => {
+  expect(lruCache().capacity).toBe(100);
+  expect(lruCache(10).capacity).toBe(10);
+  expect(lruCache(10).size).toBe(0);
+  expect(() => lruCache(0)).toThrow(Error);
+});
+
+test('LRU operation', () => {
+  const cache = lruCache<string>(3);
+  cache.set('1', 'a');
+  cache.set('2', 'b');
+  cache.set('3', 'c');
+  cache.set('4', 'd');
+  expect(cache.size).toBe(3);
+  expect(cache.has('1')).toBeFalsy();
+  expect(cache.get('1')).toBeUndefined();
+  cache.get('2');
+  cache.set('5', 'e');
+  expect(cache.has('2')).toBeTruthy();
+  expect(cache.has('3')).toBeFalsy();
+  // @ts-ignore
+  expect(() => cache.set(0)).toThrow(TypeError);

Review Comment:
   ```suggestion
     // @ts-expect-error
     expect(() => cache.set('set-key-with-no-value')).toThrow(TypeError);
   ```
   
   I think `ts-expect-error` is now preferred for such use cases. Also, we can make a small change to indicate why an error is expected. 
   



-- 
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.

To unsubscribe, e-mail: notifications-unsubscribe@superset.apache.org

For queries about this service, please contact Infrastructure at:
users@infra.apache.org


---------------------------------------------------------------------
To unsubscribe, e-mail: notifications-unsubscribe@superset.apache.org
For additional commands, e-mail: notifications-help@superset.apache.org