Re: [PR] Add `insta` / snapshot testing to CLI & set up AWS mock [datafusion]

["wiedld (via GitHub)" <gi...@apache.org>]

wiedld commented on code in PR #13672:
URL: https://github.com/apache/datafusion/pull/13672#discussion_r1982759763


##########
datafusion-cli/CONTRIBUTING.md:
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@@ -0,0 +1,72 @@
+<!---
+  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.
+-->
+
+# Development instructions
+
+## Running Tests
+
+Tests can be run using `cargo`
+
+```shell
+cargo test
+```
+
+## Snapshot testing
+
+To test CLI output, [Insta](https://github.com/mitsuhiko/insta) is used for snapshot testing. Snapshots are generated
+and compared on each test run. If the output changes, tests will fail.
+To review the changes, you can use Insta CLI:
+
+```shell
+cargo install cargo-insta
+cargo insta review

Review Comment:
   I love this idea. Thank you! ❤️ 



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