1. A computer program product comprising a non-transitory machine-readable storage medium storing instructions that, when executed by at least one programmable processor, cause the at least one programmable processor to perform operations comprising: displaying, within a business application being executed in a business application inspection and modification environment, an inspection and modification window; listing, within the inspection and modification window, application code relating to a current navigation point within the business application, wherein the application code includes one or more script languages; receiving, via one or more user inputs, modifications to the application code, the modifications comprising an insertion of a code snippet or segment for testing at the current navigation point; and resuming execution of the business application from the current navigation point to test how the received modifications to the application code affect operation of the business application.