In Mockito there is option to verify if mock method has been called, and specify timeout for this verification (VerificationWithTimeout), for example:
Using PollingConditions and a boolean variable, the following example evaluates a function until it satisfies an interaction.
def "test the config watcher to reload games if a new customer directory is added"() {
given:
def conditions = new PollingConditions(initialDelay: 1, timeout: 60, factor: 1.25)
def mockGameConfigLoader = Mock(GameConfigLoader)
def gameConfigWatcher= new GameConfigWatcher(mockGameConfigLoader)
boolean gamesReloaded = false
when:
conditions.eventually {
gameConfigWatcher.listenEvents()
assert gamesReloaded
}
then:
1 * mockGameConfigLoader.loadAllGameConfigs() >> {
gamesReloaded = true
}
0 * _
}