The (internal) method _inititialize needs to be checked with various full-instance-names. Most of the tests are already using the split values of the full instance name like self.sid, self.instance_name and self.virtual_host.
In all those cases we are not checking the correct split of the full-instance-format SID_INSTANCE-NAME_VIRTUAL-HOST-NAME.
Important is that VIRTUAL-HOST-NAME are containing underscores ("_") so the number of field when splitting the string is >=3 and not always ==3.
Test cases could be e.g.
- full instance name is: HA1_ASCS10_suse01
- full instance name is: HA1_ERS20_suse02
- full instance name is: HA1_ERS20_suse02-cluster
- full instance name is: HA1_ERS20_suse02_cluster