System and a method for automated unit test generation

A system for automating unit test case generation for one or more methods associated with an application source code, wherein the system interfaces with an application subsystem comprising the application source code, the system comprising:

• a memory storing program instructions;
• a processor configured to execute the program instructions stored in the memory;
• and a unit test generation engine in communication with the processor configured to:
• identify one or more potential executable paths associated with a selected method by analysing a code base extract using a path solving technique;
• identify one or more calls to external dependencies associated with each of the one or more potential executable paths using a symbolic execution technique;
• generate one or more hints for the identified one or more calls to external dependencies, wherein each hint is representative of call information associated with the external dependencies;
• update one or more hints with respective accurate implementations of an object type in each of the one or more hints, wherein the accurate implementation of each object type is identified based on determination of a predefined category associated with the object type from amongst predefined categories, wherein the predefined categories associated with the object type include an interface, an abstract class and a base class, wherein further accurate implementation for the object type associated with the base class is identified using type cast information associated with the object from the symbol table, and accurate implementation for the object type associated with the interface or the abstract class is identified using a predefined-list of possible implementations along with a reflection technique;
• update each of the one or more hints with respective ideal return value, wherein the ideal return value of each of the one or more calls to external dependencies is determined based on an aggregated conditional expression associated with respective paths using one or more constraint solving techniques;
• and
• generate a unit test code for the selected method by processing the one or more hints with a test data and an exclusion list.

A computer program product comprising:

• a non-transitory computer-readable medium having computer-readable program code stored thereon, the computer-readable program code comprising instructions that, when executed by a processor, cause the processor to:
• identify one or more potential executable paths associated with a selected method by analysing a code base extract using a path solving technique;
• identify one or more calls to external dependencies associated with each of the one or more potential executable paths using a symbolic execution technique;
• generate one or more hints for the identified one or more calls to external dependencies, wherein each hint is representative of call information associated with the external dependencies;
• update the one or more hints with accurate implementations of an object type in each of the one or more hints, wherein the accurate implementation of each object type is identified based on determination of a predefined category associated with the object type from amongst predefined categories, wherein the predefined categories associated with the object type include an interface, an abstract class and a base class, wherein further accurate implementation for the object type associated with the base class is identified using type cast information associated with the object from the symbol table, and accurate implementation for the object type associated with the interface or the abstract class is identified using a predefined-list of possible implementations along with a reflection technique;
• update each of the one or more hints with respective ideal return value, wherein the ideal return value of each of the one or more calls to external dependencies is determined based on an aggregated conditional expression associated with respective paths using one or more constraint solving techniques;
• and
• generate a unit test code for the selected method by processing the one or more hints with a test data and an exclusion list.