Resource bundle not found from MessageSourceAutoConfiguration in integration test

[MichaelF25]

I am just refactoring a spring boot application (using 1.2.7.RELEASE) in order to break it up into two applications. So my updated project structure looks like this:

• common (shared stuff, including a resource bundle for I18N)
• app1
• app2

With this changed structure the resource bundle is not found by spring boot's MessageSourceAutoConfiguration class within my WebIntegrationTest.
However if I try to debug this behaviour inside my IntelliJ IDE, everything works fine - same situation if the tests are ignored during the build and the application is started.

I've provided a sample reduced to the absolute minimum demonstrating this issue. mvn verify fails, but it works with debugger and executed as standalone jar. Seems like some class loading issue.

Sample project: https://github.com/MichaelF25/spring-boot-messagesource-bug

[MichaelF25]

Updated the sample and remove the dependency to REST assured. Now it's a pure spring boot based project demonstrating this issue.

[snicoll]

Yep, I had a look to it yesterday already and I am quite confused. No idea where that is coming from for now.

[philwebb]

Pretty interesting issue this one. It turns out that Maven uses MANIFEST.MF file to define the test classpath. You can read about why here. It seems that such entries aren't exposed via URLClassLoader.getURLs() so Spring's PathMatchingResourcePatternResolver can't find them.

I've raise SPR-13685 and I have a fix but it's doubtful that it will make it into Spring 4.2.x as it's quite a risky change.

In your case can you try adding useManifestOnlyJar=false and useSystemClassLoader=true to your Maven build to see it that solves things?

[philwebb]

I'll close this one here since it's really a Spring Framework issue. Please track SPR-13685.