Add unit-tests for the astra parser in parser/astraParser.go

[mikehquan19]

Add unit tests for the astra events parser using Go's built-in testing library.

Follow the current structure of the unit-tests, which means a file _test.go is associated with the file of the main code.

Be sure to seek out resources for details on how to write good unit tests if you are unsure. Also make sure to check the coverage of the test because the higher the coverage, the better.

[bvaic]

Is this unit test basically just checking the parser JSON output to known JSON for the raw JSON data that comes from astra? If that is the case then I think I could get this done. I would probably just take a snapshot of the raw JSON from astra and make some known JSON output that should be expected from the parser.