Similar to shared steps, but for test cases. This could be thought of as a suite of test cases that could be 'copied' to a subset of other suites.

i.e. I have 3 suites, apples, oranges, and bananas, that I want to test. But they have duplicate test cases in each suite i.e. isFruit? isEdible? ... but some that are unique to the suite i.e. for orange, isShapeRound? Having a shared set of test cases among these 3 suites would make it easier to maintain duplicate test cases. The reason I specify 'copy' here is to distinguish that testing each suite should still show unique results. I.e. if I test for ‘isFruit’ for apple, I wouldn’t want it to affect the test for ‘isFruit’ for orange.