Spring Boot Rest Client - How to test HTTP calls using @RestClientTest

In this tutorial you will learn how to test Rest Client calls in Spring Boot using the @RestClientTest annotation.

🔗Resources & Links mentioned in this video:

👋🏻Connect with me:

[assaduzzaman_dsi]

Nice. Is it possible to make another video regarding how we do mock of APIs that are being protected OAuth2/OIDC and CSRF enabled?

[codemonkey]

BTW, truly appreciate you taking the time to do this. :)

[andytael]

Great information! Maybe do the same wit the JDBC Client and mocking it up?

[AlessiaCaraFans]

Heyyy, pls do more videos about testing with more advanced topics, especially how to test when we have different requests at the same time for same method in a certain controller that talks to the client API, (also pls what is the name of plugin you use in intellij to autocomplete for you more than 1 line of code ) ^^ from Morocco, you're amazing Mr Dan Vega

[gallardofabian]

Nice video. Do You know a good plugin for intellij for owasp security analyzer? Maybe a series of videos with the top ten attacks

[BabaykaMoscow]

Could you, please, make a video on how to setup RestClient to use proxy with and without authentication?

[marba]

Hi Dan. Nice video. I have one question. When I write tests using give/when/then sections I put the mock configuration in the 'given' section. In the 'when' section there is the execution of the tested objected only. What do you think about that?

[peshutanpavri]

This is great, thank you so much for this. When we are doing the Integration test and we are using @SpringBootTest, we just use the regular rest client to test my own controllers ?

[codemonkey]

When I run your tutorial WITHOUT adding any specific type of HTTP client, it still calls the actual service instead of the Mock Serivce. The test of course fails with expected 2 but had 100. Has something changed since this video was published?

[JohnSmith-zsow]

Just downloaded the tutorial (with no changes) and the Test failed with 100 replies - indicating that the live server was being contacted (not the mocked server). A couple of other people seem to have had the same issue. Has there been a fix for this issue since the video was published? I commented out the JdkClientHttpRequestFactory as suggested in the video - which works - but isn't much use when your other videos recommend this substitution - meaning that I can't test the code I'm writing.

[OneClickLabs]

Could you point us to an example where the RestClient is invoking an API with HTTP method as POST method instead of GET?

[Jallallalla]

This is great. But I am stuck when I have two rest clients in my application. The documentation suggests I should use the This gets rid of the error messages and in the customizer I see my the mockservers for each of my clients. But I am stuck at how to get the correct server for each client. You can get a server out of the customizer with getServer(), but this takes a RestClient.Builder(??).

I can get the "first" server and the "second" server out of the HashMap that the customizer provides, but the tests are too flaky. Sometimes client A is the first entry and sometimes client B is the first entry.

Can you help me?

[nickcruz]

Where do you usually use the @Component? I know the @Service is for the business layers, what im quite confused with the correct usage for @Component.

[leonardoncintra]

How to test 404, 401 and 500 http status ?

[blaaarpu]

why not to use "REST Assured" lib?

[MustafaKanzii]

what is theme of dan vega ıs there any one knows it

[AlexWen-hr]

hi Dan, i got a question, what if i have configured two rest client in a configuration file, and i want to test one of them, how should i do

[dariuszchmiea]

would be more usefull if you could create rest client with properties files rather than put constant url ...

public PostClient(RestClient.Builder builder, RestClientProperties properties) {
this.restClient = builder
.baseUrl(properties.url())
.build();
}




Does not work and produce: No qualifying bean of type 'java.lang.String' available ...