Abstract: The database generation unit refers to the source program, lists routes passed during the execution of the source program, and enters the route information in the route information database. As a result of executing the load module, the relevant information such as a value of a parameter used when a route is passed, and an execution state are entered in the route information database. The similar route determination unit extracts from the route information database a route path not passed, determines a similar route from passed routes, and transmits the relevant information in the input parameter generation unit. Based on the information about similar routes, the input parameter generation unit generates and outputs an input parameter required to pass a non-passed route path and a condition to be satisfied by an input parameter.

Abstract: A method of determining a route to be tested in the testing of a load module which includes a multiplicity of routes (route patterns) from the start to the end of the program, each route pattern being composed of a multiplicity of route paths. The method comprises the steps of: (1) testing an untested route pattern and managing the current state of the testing of all the route patterns with the untested route pattern changed to a tested route pattern; (2) managing the current state of the testing of all the route paths with the route paths constituting the untested route pattern changed to tested route paths; and (3) determining an untested route pattern which is constituted by the largest number of untested route paths to be the route pattern to be tested next. These steps are repeated until there exists no untested route path in the load module test.