* Enable Gradle test-support for all samples.
* "Fix" for coverage failure org.springframework.integration.samples.barrier.ApplicationTests#contextLoads(); AmqpConnectException: java.net.ConnectException: Connection refused
~ inspired by ".. we generally use a JUnit @Rule to skip the test if the broker's not available." - Gary Russell
@see https://stackoverflow.com/a/38747559
* Temporarily disabled Gradle test-support for file-split-ftp & tcp-client-server-multiplex, in-order to allow for successful Gradle check task execution.
* Temporarily disabled remaining failing coverage, in-order to support continous integration going forward
@see https://github.com/spring-projects/spring-integration-samples/pull/335#discussion_r1072371788
Co-authored-by: Daniel Hammer <daniel.hammer+oss@gmail.com>
* Remove usage of removed `org.springframework.util.SocketUtils`
in favor of OS-selected port
* Migrate mail tests to Greenmail instead of already obsolete (and soon to be removed)
`org.springframework.integration.test.mail.TestMailServer`
* Upgrade to the latest dependencies
* Migrate samples to `jakarta` namespace
* Rework `cafe-scripted` to RSocket instead of already removed RMI
* Migrate JMS samples to Apache Artemis for Jakarta EE 9
* Disables mails tests since there is a requirement to migrate to Greenmail for Jakarta EE 9 support
* Rework `generatePom` task to a new `maven-publish` plugin style
* Use `MatcherAssert.assertThat()`
instead of deprecated `Assert.assertThat()`
* Use `IntegrationFlows.fromSupplier(Supplier)`
instead of removed `IntegrationFlows.from(Supplier)`
* Use `org.springframework.integration:spring-integration-test`
throughout the project for more testing utilities
