You can create as many test cases as you need for a Route, and manage your test cases in a similar manner like for normal Routes.
From the Repository tree view, you can:
Expand the Route to display all its test cases in the Test Cases view.
Expand the Route and select the test case of interest to show it in the Test Cases view.
Expand the Route and double-click the test case of interest to open it in the design workspace.
Expand the Route and right-click the test case of interest to open, run, open a read-only copy of, rename, or delete it.
For a Route that has test cases:
When importing the Route, you can selectively import one or more of its test cases together with the Route. However, you cannot export a test case without exporting the Route it was created for.
When working collaboratively, you can lock and unlock a test case independently of the Route for which is was created.
For more information on importing, exporting and building a Route, see Importing/exporting items and building Routes and Jobs. For more information on working collaboratively on project items, see Working collaboratively on project items.