Idea is to create a bash file with functions sourced before execution of the actual test (should IMHO be sourced by the test runner and not every individual test script to make it simpler than it was in devonfw-ide).
There we can define a function doIdeCreate() that does the following:

• local project-name="$(dirname "${BASH_SOURCE:-$0}")" (determine the name of the currently executed script)
• local settings-url=${1:--} (set local variable settings-url to - as default but if an argument was given to the function use that arg to override default URL.
• ide create ${project-name} ${settings-url}
• cd ${IDE_ROOT}/${project-name}

then most integration test scripts can start with
doIdeCreate
and then do whatever they want to test...
ide install mvn

However an integration test of the help functionality would not call doIdeCreate.