Grails test-app -integration not honoring the port number specified

[sr-nu]

Grails integration tests are not honoring the port number configured. Only run-app is using the specified port, but not test-app

Task List

• Steps to reproduce provided
• Stacktrace
• Example that reproduces the problem uploaded to Github
• Full description of the issue provided (see below)

Steps to Reproduce

1 . create an integration test
2. start an application which is bound to 8080
3. grails test-app -integration //fails
OR
grails --server.port=9999 test-app -integration //fails
OR
grails --port=9999 test-app -integration //fails
OR
application.yml
server:
port: 9999
grails test-app -integration //fails
4. Using environmental variable
SERVER_PORT=9999 grails test-app -integration //PASSED

Stacktrace

Stack trace:
java.lang.IllegalStateException
Caused by: org.springframework.boot.context.embedded.EmbeddedServletContainerException
Caused by: java.lang.IllegalStateException

Expected Behaviour

test-app should honor all methods of port configuration supported by run-app

Actual Behaviour

Tries to bind to 8080, fails with an exception

Environment Information

|Grails Version: 3.1.5
|Groovy Version: 2.4.6
|JVM Version: 1.8.0_60

Example Application

• TODO: link to github repository with example that reproduces the issue

[graemerocher]

The correct fix here is actually to use a random port

[sr-nu]

Even using PORT=0 (random port) in above variables has same behaviour. So, underlying issue is, only environmental variable is honored. Other supported was are not working for test-app

[sr-nu]

Seems like a regression bug in 3.1.5