Rhandsontable dropdown functionality breaks in Shinytest2 browser (JS permissions policy violation)

[sawelch-NIVA]

Hi, thanks as ever for the great package. I don't know how I managed without it.

I'm now trying to use Rhandsontable with dropdown options in a Shiny app (R 4.5.1, Shiny 1.11.0, Rhandsontable 0.3.8, Shinytest2 0.4.1). The table works fine in Chrome and Firefox, but when I try to record a test in the Shinytest2 browser session the dropdown cell fills stop working: specifically, I can open them, but not select an option or close them. I see there have been issues in Shinytest (not 2) about Rhandsontable cell validation failing, but nothing about dropdowns (though perhaps it's the same issue at root)?

I put together a minimal reprex:

library(shiny)
library(rhandsontable)

ui <- fluidPage(rHandsontableOutput("hot_table"))

server <- function(input, output, session) {
  output$hot_table <- renderRHandsontable({
    df <- data.frame(Status = "Active")
    rhandsontable(df, height = 300) %>%
      hot_col("Status", type = "dropdown", source = c("Active", "Inactive"))
  })
}

shinyApp(ui, server)

When I run use_shinytest2(); record_test() and then check the console in the Shinytest2 browser, I get the following error messages:

content.js:212 [Violation] Permissions policy violation: unload is not allowed in this document.
(anonymous) @ content.js:212Understand this error
VM98:130 Uncaught DataCloneError: Failed to execute 'postMessage' on 'Window': function customRenderer(instance, TD, row, col, prop, value, cellProperties) {
  if (['date', 'handsontable'...<omitted>...
       } could not be cloned.
at sendMessageToParent (eval at <anonymous> (shiny-testmode.ts:9:21), <anonymous>:130:21)
at sendInputEventToParent (eval at <anonymous> (shiny-testmode.ts:9:21), <anonymous>:134:9)
at HTMLDocument.eval (eval at <anonymous> (shiny-testmode.ts:9:21), <anonymous>:57:9)
at HTMLDocument.dispatch (jquery.js:5145:27)
at v.handle (jquery.js:4949:28)
at Object.trigger (jquery.js:8629:12)
at HTMLDocument.<anonymous> (jquery.js:8707:17)
at ce.each (jquery.js:383:19)
at ce.fn.init.each (jquery.js:205:17)
at ce.fn.init.trigger (jquery.js:8706:15)

Any insight into workarounds? It's by no means essential, but shinytest2 is so useful that I'd love to be able to get it to work with Rhandsontable.