testthat expectation for a Shiny update — expectUpdate • shinytest

testthat expectation for a Shiny update

expectUpdate(
  app,
  output,
  ...,
  timeout = 3000,
  iotype = c("auto", "input", "output")
)

Arguments

app: A ShinyDriver() object.
output: Character vector, the name(s) of the output widgets that are required to update for the test to succeed.
...: Named arguments specifying updates for Shiny input widgets.
timeout: Timeout for the update to happen, in milliseconds.
iotype: Type of the widget(s) to change. These are normally input widgets.

Examples

if (FALSE) {
## https://github.com/rstudio/shiny-examples/tree/main/050-kmeans-example
app <- ShinyDriver$new("050-kmeans-example")
expectUpdate(app, xcol = "Sepal.Width", output = "plot1")
expectUpdate(app, ycol = "Petal.Width", output = "plot1")
expectUpdate(app, clusters = 4, output = "plot1")
}