Before deprecating `TestRestTemplate`, we must first stop using it in
module tests and replace it with:
* `RestTestClient` when the Spring MVC infrastructure is present
* `RestClient` when the test does not have Spring MVC on classpath
See gh-46632
With Spring Framework 7.1 deprecating RestTemplate for removal, this
commit deprecates our supporting infrastructure as well, and steers
users towards RestClient instead:
* RestTemplateAutoConfiguration and
RestTemplateObservationAutoConfiguration
* RestTemplateBuilder, RestTemplateBuilderConfigurer, and
RestTemplateBuilderClientHttpRequestInitializer
* RestTemplateCustomizer, RestTemplateRequestCustomizer, and
ObservationRestTemplateCustomizer
* MockRestServiceServerAutoConfiguration,
MockServerRestTemplateCustomizer, and RootUriRequestExpectationManager
in the test support module
The reference documentation no longer covers RestTemplate and now
solely documents RestClient and WebClient. Code snippets and sample
tests that only existed to illustrate RestTemplate usage have been
removed accordingly.
Closes gh-51118
Create `spring-boot-resttestclient` and `spring-boot-webtestclient`
modules to hold test client auto-configuration and `TestRestTemplate`
code.
Previous these classes were contained in `spring-boot-resetclient-test`
and `spring-boot-webclient-test` which was incorrect since the `-test`
modules should hold code need to test the given modules, not supporting
test classes.
See gh-46356
Co-authored-by: Phillip Webb <phil.webb@broadcom.com>
Relocate `RestTestClientBuilderCustomizer` to `spring-boot-test`
and break the direct link to web-server by making use of
`spring.factories` and the new `BaseUrlProviders` class.
See gh-46356
Brian Clozel
Stéphane Nicoll
Andy Wilkinson
