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Manually testing Shiny applications is often laborious, inconsistent,
and doesn’t scale well. Whether you are developing new features, fixing
bug(s), or simply upgrading dependencies on a serious app where mistakes
have real consequences, it is critical to know when regressions are
introduced. {shinytest2}
provides a streamlined toolkit for
unit testing Shiny applications and seamlessly integrates with the
popular {testthat}
framework for unit testing R code.
{shinytest2}
uses {chromote}
to render
applications in a headless Chrome browser. {chromote}
allows for a live preview, better debugging tools, and/or simply using
modern JavaScript/CSS.
By simply recording your actions as code and extending them to test the more particular aspects of your application, it will result in fewer bugs and more confidence in future Shiny application development.
# Install the released version from CRAN
install.packages("shinytest2")
# Or the development version from GitHub:
# install.packages("devtools")
::install_github("rstudio/shinytest2") devtools
The easiest way to get started is by calling
shinytest2::record_test()
in your app directory. This will
open a Shiny application to record your actions as code. To
programmatically create a test, call
shinytest2::use_shinytest2_test()
.
Call shinytest2::use_shinytest2()
to create a initial
value test file and set up any other infrastructure you may need.
Please check out our Getting Started article for example usage.
These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
Health stats visible at Monitor.