Things to test: - Connection time - Request body parsing (multipart/etc) - Getting static file - Getting opencpu resource - Running code (i.e. overhead of `evaluate()`) - Loading a package - Rending resource in various formats Example tests - `GET /ocpu/test/index.html` : minimal static resource - `GET /ocpu/library/MASS/data/DDT/json`: small data from a pkg - `POST /ocpu/test/index.html` : test body parsing time, and http error - `POST /ocpu/library/stats/R/rnorm` : basic RPC