Use the functionalities already provided by `testify` to assert eventual
conditions, and remove the use of `time.Sleep`.
Remove duplicate code in utility functions that are already defined.
Refactor assertion helper functions to use consistent terminology:
"require" implies fatal error, whereas "assert" implies error where the
test may proceed executing.
Refactor `map` usage for actor event table tests to ensure deterministic
test execution order, making debugging potential issues easier. If
non-determinism is a target, leverage Go's built-in parallel testing
capabilities.
