1. A method of generating testcases, comprising: receiving, at a data processing system, a new product specification for an application; performing, by the data processing system, a noun-verb pairing on the new product specification; attempting to locate, by the data processing system, a similar noun-verb pairing, corresponding to the new noun-verb pairing, in a previous product specification for the application; in response to locating the similar noun-verb pairing in the previous product specification, generating, by the data processing system, a new testcase by modifying an existing testcase that is associated with the similar noun-verb pairing in the previous product specification; and in response to not locating the similar noun-verb pairing in the previous product specification, indicating, by the data processing system, that the new testcase was not generated.