Consumer-driven Contract Testing using Postman

I have gotten many questions regarding contract tests or consumer-driven contract tests in Postman but also how to integrate these tests in a CI/CD pipeline (I have shown an example with GitLab CI).

I decided to create a 30-minute tutorial to introduce you to this topic. I hope you find it useful.

Customers repository (including the CI pipeline in GitLab CI)

#contracttesting #postman

Bookmarks:

00:00:00 Welcome
00:00:49 Provider and Consumer
00:05:00 What is an API test?
00:10:00 What is a contract test?
00:13:05 Advantages of consumer-driven contract tests
00:14:44 Write contract test in Postman
00:24:47 API tests vs contract tests
00:28:04 Summary

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[vdespa]

👉 Want to learn more about Postman? Check my complete Postman online course.

[selvaraj]

Interesting to know and see how we can use postman for contract testing, a useful tutorial, thank you, Valentin.

[manisharya]

I am a big fan of you .. Valentin :) You make things so simple !!

[CatherineKarena]

Really good topic to do, thanks Valentin. Much appreciated.

[josephgonzalez]

Thank you for the explanation of this topic. I've been trying to figure out how to implement CDC tests in Postman all week. While the schema validation doesn't quite work for this purpose, Postman still seems to be a good tool for CDC tests. Personally, I was only using contract tests to enforce the documented schemas in the API spc as the provider.

[parasvora]

Informative tutorial Valentine, thanks. Can the presentation be shared?

[modakthepuppy]

Thanks Valentin that was a great video, however I have one question regarding changing the "firstName" typo. Can you elaborate as to what happens when the producer rectifies the typo ? Does the "consumer service" pipeline fail due to the contract ? and the producer has to collaborate with all the relevant consumers ?

[Irfan-kfhu]

Awesome content Valentin. If I have to try what you were showing in the demo (the CI part), is there a GitHub repository I could download or is there any course particularly covering what you were discussing in the CI pipeline, the whole 9-yards of Docker and Postman API tests as well as the Billing contract test from your demo. I'm very interested in trying it out. Thank you!

[ricardodemp]

Great stuff Valentin!! Ask me a question: where do I find more materials about Consumer-driven Contract Testing using Postman?

[AlexanderHvastovich]

Please do spring cloud contract testing series

[luca_raveri]

What if the request modifies the status of the database? In Java Spring, I can mock the repository layer, but it seems that I can't do it this way. So, if I perform, for example, a POST request, I'm going to add data to my database every time I execute my tests, and I definitely don't want this. Is there a way to fix this issue?

[afzalaiet]

Thanks for this stuff. Just wanted to know if we can do it for POST/PUT or it is only for GET HTTP requests?

[christopherlim]

@Valentin Despa
I am not sure if you already answered this question. But I tried doing exactly you did on this tutorial, but instead of java/gradle I did NestJS and stored in my gitlab repo registry. But for some reason, when I tried doing Docker inside Docker and run my test. I am getting Error Refused Connection, but in this video you did not got any error. Am I missing a step or something?

[Zack-nivz]

can you show us how to test api calls from certain websites using chrome on postman? so far i have learned to copy the information from certain api calls and duplicate it on the postman but its still confusing. can you give a quick walkthrough?

[sumitsuryavanshi]

Can you please add assertions and validation test for same response in this example, because whole response is in array ' [ ] ' notation..so please help me to write validation of each and every parameters in the response body.
Thank you,

[AliRaza-nltf]

Postman Contract Testing is free or paid?

[anthonyc]

Swagger was throwing me off as I was confusing it as an API of my Collection

[karahtar]

What would then be the differences between API tests and provider-driven contract testing?

[sn]

I noticed a gay flag on your laptop 💻?