Extend unit tests for SubArray

[hctrdev]

Requirement

Add a new unit test for the SubArray array extension to ensure it works as expected when one index is out-of-bounds, e.g. -2 to n/2 (where n is the size of the array).

In this case the SubArray function should return the array of values from 0 to n/2.

Also update the test to take multiple parameters instead of having multiple assert statements in the same test. This will make it easier to add new test cases.

Value Proposition

The existing tests cases only cover cases with indices that are always in-bounds or out-of-bounds. Not a mix of the two. This test would help ensure the function behaves correctly in all cases.

Design Ideas

• Refactor test case provider to provide the array, the start/end index, and the expected array
• Add test cases for out-of-bound indices on one or both sides