Implement Benchmarking/Testing

[rbasu101]

Look into implementing a method to benchmark the methods in dgidb.R.
Additionally look into setting up unit testing for dgidb.R

[mcannon068nw]

do you have any experience with testthat? https://testthat.r-lib.org/

[mcannon068nw]

This looks like a good starting guide: https://www.johnmyleswhite.com/notebook/2010/08/17/unit-testing-in-r-the-bare-minimum/

[mcannon068nw]

I think we might want to use testthat but we can look into the pros and cons of both: https://contributions.bioconductor.org/tests.html