App testing with Electron

[hhaensel]

Since Stipple and StippleUI's functionality grew a lot over time, the danger of breaking some of the functionality even if tests pass is high. Some of the functionality cannot be tested with the standard testing.

Here I want to discuss how app testing can be achieved - maybe not on CI but at least locally, to track bugs before releasing them.

I find that Electron.jl has all functionality for local testing, but I think headless testing might still be difficult. Happy to discuss this here.
My current setup for app testing:

using Stipple, Stipple.ReactiveTools
using StippleUI
using Electron
using GLFW

url = "http://localhost:8000"

win = Window(URI(url), options = Dict(
        "transparent" => true, # if you like it
        "width" => GLFW.primarymonitorresolution()[1], # full screen if required
        "height" => GLFW.primarymonitorresolution()[2],
))

toggle_devtools(win) # if required

# run executes a command at the browser's console
ready::Bool = false
for i = 1:60
    ready = run(win, "window.GENIEMODEL ? GENIEMODEL.isready : false")
    ready && break
    sleep(1)
end

try
  run(win, "GENIEMODEL.mytext = 'Hello World'")
catch e
  error(e)
end