# Testing strategies for a green field rewrite of the first slice of an existing monolith

**URL:** <https://club.ministryoftesting.com/t/testing-strategies-for-a-green-field-rewrite-of-the-first-slice-of-an-existing-monolith/66575>\
**Category:** Discussions\
**Created:** [4 April 2023 11:28 UTC](https://club.ministryoftesting.com/t/testing-strategies-for-a-green-field-rewrite-of-the-first-slice-of-an-existing-monolith/66575 "2023-04-04T11:28:27Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jaswanth](https://sea2.discourse-cdn.com/flex020/user_avatar/club.ministryoftesting.com/jaswanth/32/7989_2.png) [@jaswanth](https://club.ministryoftesting.com/u/jaswanth)\
**Post date:** [4 April 2023 11:28 UTC](https://club.ministryoftesting.com/t/testing-strategies-for-a-green-field-rewrite-of-the-first-slice-of-an-existing-monolith/66575/1 "2023-04-04T11:28:27Z")

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Hello folks 👋🏻

**First let me start with some context:**

We are just starting out a new project aiming to rebuild the first slice of our existing monolith. Our monolith has been shared by 6+ teams over the last few years and has produced challenges in teams moving at a good pace without breaking other features.

We took a shot at re-architecting the monolith but given the complexity, decided against it.

**Question for the think tank**

What would you do in such a situation where you have the opportunity to rewrite from the bottom up. Specifically what strategies have (or would) you used in the past that has worked for you ?

Some key areas that we are looking into regarding testing

- Test data
- Test environments
- Observability
- Deployment strategy
- Traffic shadowing  
Etc.

Open to suggestions, recommendations and ideas 💡 Thanks a lot 🙏🏻

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**Author:** ![parwalrahul](https://sea2.discourse-cdn.com/flex020/user_avatar/club.ministryoftesting.com/parwalrahul/32/11376_2.png) [@parwalrahul](https://club.ministryoftesting.com/u/parwalrahul)\
**Post date:** [4 April 2023 19:32 UTC](https://club.ministryoftesting.com/t/testing-strategies-for-a-green-field-rewrite-of-the-first-slice-of-an-existing-monolith/66575/2 "2023-04-04T19:32:24Z")

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I refer HTSM template and use it as a guideword to derive my strategy.

It covers a lot of ideas for things that we can unintentionally miss.

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**Author:** ![system](https://sea2.discourse-cdn.com/flex020/user_avatar/club.ministryoftesting.com/system/32/14378_2.png) [@system](https://club.ministryoftesting.com/u/system)\
**Post date:** [3 April 2025 11:28 UTC](https://club.ministryoftesting.com/t/testing-strategies-for-a-green-field-rewrite-of-the-first-slice-of-an-existing-monolith/66575/3 "2025-04-03T11:28:30Z")

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Closed on 3 April 2025 11:28 UTC

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