Tests would have @ContainerInstance("InstanceName").

As Arquillian would run these tests, it would stop the currently running container and start the other one.

@TestCase @ContainerInstance("InstanceFoo")
class TestsToBeRunOnFooTestCase { ... }

@TestCase @ContainerInstance("InstanceBar")
class TestsToBeRunOnBarTestCase { ... }

@TestCase @ContainerInstance("InstanceFoo")
class TestsToBeRunOnFoo2TestCase { ... }

With this setup, Arq would:

• start InstanceFoo
  • run TestsToBeRunOnFooTestCase
  • run TestsToBeRunOnFoo2TestCase
• stop InstanceFoo
• start InstanceBar
  • run TestsToBeRunOnBarTestCase
• stop InstanceBar

To optimize a bit, Arquillian could order the test to group them by instance name.