Sandbox test suite Generic Tests Authentication Tests Content Types Header Tests Not Found Tests Quota Tests Timeout Tests Error Tests POST /v1/message-batches Validation Tests Invalid Routing Plans Performance Tests Happy Path Tests Service Ban Retry Too Early POST /v1/messages Validation Tests Invalid Routing Plans Happy Path Tests GET /v1/messages/{messageId} Happy Path Tests 404 Tests GET /channels/nhsapp/accounts Happy Path Tests 404 Tests 400 Tests 429 Tests 502 Tests