Prior to this commit, properties configured using the properties
attribute of a `@…Test` sliced test annotation would not be considered
when processed a `@Nested` test class. This would lead to the nested
class not reusing its outer class's application context due to the
two having different property configuration.
Fixes gh-33317
Prior to this commit, Spring Boot would auto-configure a customizer that
instruments `RestTemplate` through a `RestTemplateBuilder`. This would
install a request interceptor that instrumented client exchanges for
producing metrics.
As of spring-projects/spring-framework#28341, the instrumentation is
done at the `RestTemplate` level directly using the `Observation` API.
The `Tag` (now `KeyValue`) extraction, observation name and
instrumentation behavior now lives in the Spring Framework project.
This commit updates the auto-configuration to switch from Boot-specific
Metrics instrumentation to a generic Observation instrumentation.
As a migration path, some configuration properties are deprecated in
favor of the new `management.observations.*` namespace.
Closes gh-32484
This commit disables ContextCustomizer implementations that tune a
test configuration context at runtime. Previously, these ran again and
required additional hints to work properly.
Rather than contributing those hints, the customizer is skipped as its
impact is irrelevant in an AOT-optimized context: the context is fully
prepared and the updates on the MergedContextConfiguration are not taken
into account.
Closes gh-32422
Our mock didn't configure an expectation so null was returned. That's
prohibited by the javadoc and some recent Framework changes mean that
it's no longer tolerated.