Use test helpers in main_test.go
This MR switches us to the assert and require test helpers throughout main_test.go, adding some obviously missing assertions (principally content-types).
Related to #123 (closed)
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
This MR switches us to the assert and require test helpers throughout main_test.go, adding some obviously missing assertions (principally content-types).
Related to #123 (closed)