Spring Integration Test Example

Having all sorts of issues trying to get spring integration tests running. Asked a question on StakOverflow but all a bit convoluted help there. So decided to get the simplest example of our setup to see if I can reproduce the various issues I am hitting.

Basic usage

So in these examples you can build the applications with.

mvn clean install

And then you can successfully run the applications with (eg case1):

java -jar case1/case1-app/target/case1-app-0.0.1-0-SNAPSHOT.jar

The applications will run successfully.

But integration testing (triggered by the itest maven profile) will fail:

Case0: Class Not found

So the issue here is the application module test is giving a classNotFound error when trying to autowire a service from the application module.

mvn clean verify -P itest -pl case0 -am -amd
...
[INFO] Running com.sodved.itestcase0.app.itest.IntegrationIT
[ERROR] Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0.003 s <<< FAILURE! - in com.sodved.itestcase0.app.itest.IntegrationIT
[ERROR] com.sodved.itestcase0.app.itest.IntegrationIT  Time elapsed: 0.002 s  <<< ERROR!
java.lang.NoClassDefFoundError: Lcom/sodved/itestcase0/app/service/AppService;
Caused by: java.lang.ClassNotFoundException: com.sodved.itestcase0.app.service.AppService

Which is really weird as everything compiles OK and runs fine.

java -jar case0/case0-app/target/case0-app-0.0.1-0-SNAPSHOT.jar

So why is the service component from the app module not being found?

Case1: Class Not found (but works if in different module)

This is the same as above, but shows that it does work if the service class is defined in a different maven module. Here I have commented out the AppService reference in the test, and it works with LibService only.

mvn clean verify -P itest -pl case1 -am -amd

But if you uncomment the AppService line you get the same error as in case 0. a service from the application module.

mvn clean verify -P itest
...
[INFO] Running com.sodved.itestcase1.app.itest.IntegrationIT
[ERROR] Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0.003 s <<< FAILURE! - in com.sodved.itestcase1.app.itest.IntegrationIT
[ERROR] com.sodved.itestcase1.app.itest.IntegrationIT  Time elapsed: 0.002 s  <<< ERROR!
java.lang.NoClassDefFoundError: Lcom/sodved/itestcase1/app/service/AppService;
Caused by: java.lang.ClassNotFoundException: com.sodved.itestcase1.app.service.AppService

Once again, actually running the app works fine.

java -jar case1/case1-app/target/case1-app-0.0.1-0-SNAPSHOT.jar