![](/img/trans.png)
[英]Jetpack Navigation Component handle navigation controller with Bottom Navigation and it's Back Stack navigation
[英]Espresso pressBack() to check if back navigation works with Jetpack Navigation Component
我目前正在测试我的导航(Jetpack + Espresso)。 我有2个片段:
我已经编写了从 Fragment 1 导航到 Fragment 2 的测试:
@Test
fun clickAddItemButton_navigateToAddItemFragment() {
val navController = mock(NavController::class.java)
launchFragmentInHiltContainer<ToDoListFragment> {
Navigation.setViewNavController(requireView(), navController)
}
onView(withId(R.id.fabAddItem)).perform(click())
verify(navController).navigate(
ToDoListFragmentDirections.actionToDoListFragmentToAddItemFragment()
)
}
如何测试从 Fragment2 到 Fragment1 的返回导航? 到目前为止,我的测试抛出了一个异常:
@Test
fun pressBackButton_navigateToListFragment() {
val navController = Mockito.mock(NavController::class.java)
launchFragmentInHiltContainer<AddItemFragment> {
Navigation.setViewNavController(requireView(), navController)
}
// simulate back button press
pressBack()
// verify navigation to second fragment
Mockito.verify(navController).navigate(
AddItemFragmentDirections.actionAddItemFragmentToToDoListFragment()
)
}
例外:
androidx.test.espresso.NoActivityResumedException: Pressed back and killed the app
at dalvik.system.VMStack.getThreadStackTrace(Native Method)
at java.lang.Thread.getStackTrace(Thread.java:1538)
at androidx.test.espresso.base.DefaultFailureHandler.getUserFriendlyError(DefaultFailureHandler.java:96)
at androidx.test.espresso.base.DefaultFailureHandler.handle(DefaultFailureHandler.java:59)
at androidx.test.espresso.ViewInteraction.waitForAndHandleInteractionResults(ViewInteraction.java:322)
at androidx.test.espresso.ViewInteraction.desugaredPerform(ViewInteraction.java:178)
at androidx.test.espresso.ViewInteraction.perform(ViewInteraction.java:119)
at androidx.test.espresso.Espresso.pressBack(Espresso.java:229)
根据您失败的测试,您只需从AddItemFragment回退,它只是容器中的片段。 这就是它失败的原因。 为了使其正常工作,首先启动ToDoListFragment ,导航到 AddItemFragment 然后按回()以验证您已移动到列表片段。 基本上clickAddItemButton_navigateToAddItemFragment 中的代码需要首先放在第二个测试中。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.