Visual Studio Automated Refactoring Tool Should Improve Development Time, but ReSharper Led to More Solution-Build Failures

Several studies showed effectiveness of manual refactoring. Thus, automated refactoring tools in Visual Studio are expected to have positive effects on the success rate of `Builds'. Few studies have actually investigated automated refactoring tools impact in this aspect. In addition, we have investigated test results, commits and undo changes into version control system (VCS) also. Firstly, if the number of successful compilation of session solution `Builds' is considered as a metric, our investigation on Enriched Event Stream Dataset showed use of ReSharper has lowered the success rate of builds, introduced errors and may have increased the development time.Secondly, test error rates decreased when ReSharper tools are used aligned with previous studies on software testing. Finally, percentage of commits has significantly increased and reverts decreased on use of ReSharper. Overall, despite some positive impacts that the automated refactoring tool of Visual Studio had, our study showed that the automated suggestions and changes that ReSharper has made are not completely trustable. Our research suggests that ReSharper may not consider a global view of the solution.