TornadoFX with TestFX close the View after every TestCase - javafx

Question

I am trying to test a basic loginscreen (created using tornadofx) with the testfx framework.
I have added 3 test cases which runs fine but the problem is they use the previous stage rather than creating a new one. I want the testcases to run independently.
I am testing a View() and not an App(). If I use MyMainApp().start(stage) and then MyMainApp().stop(), I get the required behaviour.
But how to do this for Views and Fragments.
Below is the code:
class LoginScreenFeatureTest : ApplicationTest() {
override fun init() {
FxToolkit.registerStage { Stage() }
}
override fun start(stage: Stage) {
LoginScreen().openWindow()
//MyMainApp().start(stage)
}
override fun stop() {
FxToolkit.cleanupStages()
//FxToolkit.toolkitContext().registeredStage.close()
//MyMainApp().stop()
}
#Test fun should_contain_button() {
// expect:
verifyThat("#submitBut", hasText("SUBMIT"))
}
#Test fun should_click_on_button_and_pass_login() {
//init
//Why do I always need to erase text. I want a new stage for every test case.
clickOn("#username").eraseText(10).write("validUser")
clickOn("#password").eraseText(10).write("validPwd")
clickOn("#orgId").eraseText(10).write("validOrg")
// when:
clickOn("#submitBut")
// then:
//verify success
}
#Test fun should_click_on_button_and_fail_login() {
//init
clickOn("#username").eraseText(10).write("anyuser")
clickOn("#password").eraseText(10).write("anypwd")
clickOn("#orgId").eraseText(10).write("anyorg")
// when:
clickOn("#submitBut")
// then:
//verify fail
}
}

Answer 1

You can add property which you can edit at any time at you App() class.
class MyMainApp: App() {
override val primaryView: KClass<out View> = primaryViewMyApp
companion object {
var primaryViewMyApp: KClass<out View> = MyMainAppView::class
}
init {
importStylesheet(<your stylesheet>)
}
override fun start(stage: Stage) {
super.start(stage)
}
override fun stop() {
super.stop()
}
}
and in the test you can than use any view you want to use. I didnt try to implement something for Fragment so far...
override fun init() {
FxToolkit.registerStage { Stage() }
}
override fun start(stage: Stage) {
MyMainApp.primaryViewGoApp = <your view>::class
MyMainApp().start(stage)
}
override fun stop() {
FxToolkit.cleanupStages()
MyMainApp().stop()
}