43 - file-scoped reusable variables for test file

[someOne404]

Related to #43
Extracted file-scoped reusable variables for executor.test.js. Moved repeated code into beforeEach block.

• Does all of your new or changed code have unit tests?
• Is overall unit test statement coverage still above 85%?
• Is code style linting passing with npm run lint?
• Is the related GitHub issue number included in your branch name? ex branch name: fix/12-some-bug
• Is the related GitHub issue number included in your pull request title? example PR title: "12 - Fixes some bug"
• Is documentation still up to date after your change?

[someOne404]

@worldjoe will this one be reviewed? If this is not qualified I can close it.