on_bioconductor         Detect Bioconductor
on_cran                 Detect CRAN
online                  Checks related to networking
using_account           Determine whether a given user account is being
                        used
using_ci                Detect whether running in a CI environment
using_conda             Determine whether Conda environment is being
                        used
using_config            Detect whether a configuration is currently
                        active
using_container         Detect container environments
using_covr              Detect covr
using_cpu               Processor Checks
using_databricks        Detect Databricks Runtime Environment
using_envvar            Determine whether an environment variable is
                        being used
using_nix_shell         Detect 'Nix' Shell
using_option            Determine whether a global option is being used
using_os                Tests for operating systems
using_positron          Positron environments
using_python_venv       Determine whether a Python virtual environment
                        is being used
using_quarto            Quarto documents
using_r_version         R session information
using_rstudio           RStudio environments
using_testthat          Detect testthat
using_vscode            Detect whether code is running in Visual Studio
                        Code
