inst/doc/zzz-faq.R

In shinytest2: Testing for Shiny Applications

## ----setup, include=FALSE-----------------------------------------------------
knitr::opts_chunk$set(echo = TRUE, eval = FALSE)

## -----------------------------------------------------------------------------
#  if (isTRUE(getOption("shiny.testmode"))) {
#     # Do something special here
#  }

## -----------------------------------------------------------------------------
#  shinyApp(
#    ui = fluidPage(
#      verbatimTextOutput("random")
#    ),
#    server = function(input, output, session) {
#      output$random <- snapshotPreprocessOutput(
#        renderText({
#          paste("This is a random number:", rnorm(1))
#        }),
#        function(value) {
#          sub("[0-9.]+$", "<a random number>", value)
#        }
#      )
#    }
#  )

## -----------------------------------------------------------------------------
#  test_that("Bookmark works", {
#    # Start local app in the background in test mode
#    bg_app <- shinytest2::AppDriver$new("path/to/shiny/app")
#    # Capture the background app's URL and add appropriate query parameters
#    bookmark_url <- paste0(bg_app$get_url(), "?_inputs_&n=10")
#    # Open the bookmark URL in a new AppDriver object
#    app <- shinytest2::AppDriver$new(bookmark_url)
#  
#    # Run your tests on the bookmarked `app`
#    app$expect_values()
#  })