如何使用Espresso测试片段是否可见

本文介绍了如何使用Espresso测试片段是否可见的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我用按钮编写了一个非常简单的Activity.单击该按钮后，我将启动一个新的Fragment.现在，我想在Espresso UI测试中测试此逻辑.所以我为我的Activity

I wrote a very simple Activity with a Button. When the button is clicked, I will start a new Fragment. Now I want to test this logic in my Espresso UI Test. So I wrote this UI Test for my Activity

@RunWith(AndroidJUnit4::class)
@LargeTest
class MainMenuUiTest {

@get: Rule
val activityTestRule: ActivityTestRule<MainActivity> = ActivityTestRule(MainActivity::class.java)

 @Test
 fun switchToFragment() {
     onView(withId(R.id.btn)).perform()
 }

}

当单击按钮时，如何测试我的Fragment是否显示?

How can I test that my Fragment is displayed when the button is clicked?

推荐答案

尝试以下操作:

@Test
fun switchToFragment() {
    onView(withId(R.id.btn)).perform(click())
    onView(withId(R.id.fragment)).check(matches(isDisplayed()))
}

如果您只是在学习Espresso，则官方指南是开始的好地方.另外，这是浓缩咖啡秘籍表.

If you're just learning about Espresso, the official guide is a good place to start. Also, here's the Espresso cheat sheet.

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