To cite package ‘cucumber’ in publications use:

  Sobolewski J (2024). _cucumber: Behavior-Driven Development for R_. R
  package version 1.0.4, <https://CRAN.R-project.org/package=cucumber>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {cucumber: Behavior-Driven Development for R},
    author = {Jakub Sobolewski},
    year = {2024},
    note = {R package version 1.0.4},
    url = {https://CRAN.R-project.org/package=cucumber},
  }