Here are some tests for val InvocationTracker

1. Constructor test with valid inputs
   • tests creating a new InvocationTracker instance with valid name and granularity
2. Constructor test with invalid name
   • verifies that creating an InvocationTracker with an invalid name throws an error
3. Constructor test existing table
   • verifies that creating an InvocationTracker with an already existing table does not modify that table
4. Granularity method test
   • checks if the Granularity() method returns the correct initial granularity value
5. setGranularity method test
   • tests setting a new granularity value and verifies it's updated correctly
6. increment method test
   • verifies that the increment() method correctly increases the invocation count
7. InvocationsInSpan method test
   • tests retrieving invocations within a specific time span, including multiple time periods
8. totalInvocationsInSpan method test
   • checks if the total number of invocations within a given time span is calculated correctly
9. reset method test
   • verifies that the reset() method clears all recorded invocations