  A natural method to evaluate the effectiveness of a testing technique is to
measure the defect detection rate when applying the created test cases. Here,
real or artificial software defects can be injected into the source code of
software. For a more extensive evaluation, the injection of artificial defects
is usually needed and can be performed via mutation testing using code mutation
operators. However, to simulate complex defects arising from a misunderstanding
of design specifications, mutation testing might reach its limit in some cases.
In this paper, we present an open-source benchmark testbed application that
employs a complement method of artificial defect injection. The application is
compiled after artificial defects are injected into its source code from
predefined building blocks. The majority of the functions and user interface
elements are covered by creating front-end-based automated test cases that can
be used in experiments.
