NotificationTest.kt

@Test
fun test_whenNotificationIsClickedOpensDetails() {
    // Send the notification
    val id = 13
    val name = "New reward!"
    myNotification.send(id = id, name = name)
   
    val manager = context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager

    // Wait until the active notification list has a new one
    composeTestRule.waitUntil { manager.activeNotifications.isNotEmpty() }
    
    // Run the PendingIntent related to notification content
    manager.activeNotifications.first().notification.contentIntent.send()

    // Validate the screen is shown
    composeTestRule.onNodeWithText("My screen title").assertIsDisplayed()
    composeTestRule.onNodeWithText(name).assertIsDisplayed()
}