1. A method for testing a computerized trading system having a verification subsystem and one or more trading environments for performing trading of financial instruments, each of the trading environments having a communication network interface, storage memory, and a matching engine executed by a processor, the method comprising: retrieving, by the verification subsystem, at least one defined use case, each defined use case comprising one or more command lines; parsing, by the verification subsystem, the command lines based on defined parsing rules to produce parsed command lines, each parsed command line comprising a verb specifying at least one financial transaction and each parsed command line further comprising one or more fields, each field containing a parameter of the at least one specified financial transaction; mapping, by the verification subsystem, the verb and fields of each command line based on defined mapping relationships to generate a test case; executing, by the verification subsystem, the test case to generate one or more messages to be executed by the trading system and one or more validations to be performed; transmitting, by the verification subsystem, the messages which are executed in the one or more trading environments of the trading system; reading, by the verification subsystem, parameters of the trading system specified by the validations for comparison to specified validation values.