1. A method for concurrency testcase generation by a computer system comprising a processor, comprising: displaying a concurrency testcase template for features built into a concurrency testcase generation infrastructure that requires no compilation; receiving first directives input through the concurrency testcase template for managing activities of concurrent threads; receiving second directives input through the concurrency testcase template for configuring timing tests by the concurrent threads; receiving third directives input through the concurrency testcase template for configuring responses to errors encountered by the concurrent threads; receiving fourth directives input through the concurrency testcase template for configuring logging of data for the concurrent threads; creating a concurrency testcase comprising the first, second, third, and fourth directives by the concurrency testcase generation infrastructure; and executing the concurrency testcase on an application code by implementing the features built into the concurrency testcase generation infrastructure according to the concurrency testcase, comprising: implementing one or more of the following features according to the first directives in the concurrency testcase: assigning tasks to the concurrent threads; setting a sequence of the concurrent threads; implementing signaling for exchange of information between the concurrent threads; and enabling or disabling a thread pool; implementing a timer according to the second directives in the concurrency testcase to delay task execution until each thread is created; configuring services to respond to the errors encountered by the concurrent threads according to the third directives in the concurrency testcase; and implementing a facility to log the data for the concurrent threads according to the fourth directives in the concurrency testcase.