Write tests

[Timothy-Gonzalez]

It's time to write tests. Here's a list of things we need to test, ideally to be completed in their own PRs (some may be combined if it makes sense). This issue will act as a central issue to track everything!

Services

• Tests for auth service #108
  • Also includes libs, will require having a test google oauth flow maybe or we just don't test that, but we should at least have a mocked version of this
• Tests for event service #93
• Tests for newsletter service
• Tests for profile service #103
• Tests for staff service
• Tests for admission service
• Tests for user service #94
• Tests for version service

Middleware

• Tests for select-auth middleware
• Tests for verify-jwt middleware

Misc

• Tests for database.ts
  • A little weirder to test, but should be really simple to with a mock of mongoose.createConnection and getBaseURL

Config reader excluded since it shouldn't be middleware anyways

Finally, other misc thing that needs to be done:

• Add coverage requirements #91