https://github.com/tedyoung/expense-report-kata-ensemble
Expense Report Kata for Ensembling
https://github.com/tedyoung/expense-report-kata-ensemble
Last synced: about 1 year ago
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Expense Report Kata for Ensembling
- Host: GitHub
- URL: https://github.com/tedyoung/expense-report-kata-ensemble
- Owner: tedyoung
- Created: 2023-04-03T22:25:30.000Z (about 3 years ago)
- Default Branch: main
- Last Pushed: 2023-04-27T05:34:31.000Z (about 3 years ago)
- Last Synced: 2025-03-08T02:04:52.626Z (over 1 year ago)
- Language: Java
- Size: 4.88 KB
- Stars: 0
- Watchers: 4
- Forks: 1
- Open Issues: 0
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Metadata Files:
- Readme: README.md
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README
# Expense Report Kata
This is the Java-only version of the kata from https://github.com/christianhujer/expensereport.
The relevant parts of the README are below.
## Changes I Made
I've updated it to the latest JUnit, added the AssertJ assertion library, and bumped the Java version to 17.
I also split the classes/enums into separate files and added a starter test method.
----
# ExpenseReport
The ExpenseReport legacy code refactoring kata in various languages.
This is an example of a piece of legacy code with lots of code smells.
The goal is to support the following new feature as best as you can:
* Add Lunch with an expense limit of 2000.
## Process
1. 📚 Read the code to understand what it does and how it works.
2. 🦨 Read the code and check for design and code smells. Make a list of all code and design smells that you find.
3. 🧑🔬 Analyze what you would have to change to implement the new requirement without refactoring the code.
4. 🧪 Write a characterization test. Expand your list of code and design smells. Add those smells that you missed earlier and discovered now because they made your life writing a test miserable.
5. 🔧 Refactor the code.
6. 🔧 Refactor the test.
7. 👼 Test-drive the new feature.
## Other plans
- Make sure that all languages are providing the identical challenge.
To be practical, this will require the removal of the timestamp side-effect.
- Provide the time-stamp side-effect on a separate branch.
- Provide a test setup (without test) on a separate branch so that folks can choose whether they want to include the setup work in the kata or not.
- Provide a level 2 challenge for creating an HTML report besides the Plain Text report.
## Credits
I first encountered the ExpenseReport example during a bootcamp at Equal Experts.
I also have seen the ExpenseReport example being used by Robert "Uncle Bob" C. Martin.
However, he seems to not be the original author (https://twitter.com/unclebobmartin/status/1537063143326855176?s=20&t=lh_vVb9jUQmY6PYG50974w)
I have tried to research its origins but so far I have failed.
If you know who has first come up with this example, please get in touch with me.