18. The method of claim 10 , wherein in the converting, each of the plurality of test cases is generated so as to be divided into at least one of Test scenario ID, Testcase ID, Inflow, Event, Condition, and Outflow.
10. A method of generating a multi-level test case in an apparatus of generating a multi-level test case from a unified modeling language (UML) sequence diagram (SD) based on a multiple condition control flow graph (MCCFG), the method comprising the steps of: model-converting, by a model converting unit, the unified modeling language (UML) sequence diagram (SD) according to a unified modeling language (UML) sequence diagram (SD) metamodel and a multiple condition control flow graph (MCCFG) metamodel to generate the multiple condition control flow graph (MCCFG); and converting, by a coverage criteria unit, the multiple condition control flow graph (MCCFG) into a plurality of test cases.