@TestConfiguration disables proxying of @Bean methods

[agebhar1]

After upgrade to Spring Boot v2.2 the test configuration class which is annotated with @TestConfiguration is not proxied by CGLIB anymore, thus calling @Bean methods return new instances every time.

After quick search in Spring Framework cores changes gives a hint:

[...] or not finding annotations anymore where they have previously been found accidentally.

The corresponding commit in Spring Framework.

[wilkinsona]

Thanks for the report. It may have been a mistake to change @Configuration to @Configuration(proxyBeanMethods=false) on @TestConfiguration. You can work around the current behaviour by replaced @TestConfiguration with @Configuration and @TestComponent instead.

thus calling @Bean methods return new instances every time.

This is only a problem is your own code calls @Bean methods directly. If you leave it to the Framework to call them, it will ensure that they are only called once. We recommend not calling @Bean methods from your own code as it allows bean method proxying to be disabled which improves startup performance.

[agebhar1]

Thank you @wilkinsona for your fast reply and workaround. The @Bean method calls are used only in test(s).

[rsbeoriginal]

does this needs to be fixed ?

[wilkinsona]

Closing in favour of #18675.