Android执行功能测试订单

Question

我有一个应用程序,其中MainActivity布局由两个TextView(tvName和tvEmail)和一个按钮(btnLogout)组成.

我有这些测试方法的功能测试(最后的代码):

• testUserDetailsAreShown:检查TextView是否包含正确的文本值.
• testLoginActivityStarts:对btnLogout按钮执行单击操作,并检查是否已加载LoginActivity.

我的问题是,如果我评论testLoginActivityStarts,那么testUserDetailsAreShown传递.但是,当两者都被取消注释时,两者都会失败.

java.lang.NullPointerException
at android.support.test.espresso.intent.Intents.resumedActivitiesExist(Intents.java:235)
at android.support.test.espresso.intent.Intents.intended(Intents.java:184)
at android.support.test.espresso.intent.Intents.intended(Intents.java:169)
at net.example.login.MainActivityTest.testLoginActivityStarts(MainActivityTest.java:46)

和

android.support.test.espresso.NoMatchingViewException: No views in hierarchy found matching: with id: net.example.login:id/tvName

我认为这是因为testLoginActivityStarts在testUserDetailsAreShown之前执行,并且当testUserDetailsAreShown正在执行时,加载的活动不是MainActivity,而是LoginActivity.

谁能帮我这个？我需要让两个测试通过.我相信他们应该通过.

这里测试代码:

public class MainActivityTest extends ActivityInstrumentationTestCase2<MainActivity> {
private String USER_NAME = "UserName";
private String USER_EMAIL = "UserEmail";

public MainActivityTest(){
    super(MainActivity.class);
}

public void testUserDetailsAreShown() {
    onView(withId(R.id.tvName)).check(matches(withText(USER_NAME)));
    onView(withId(R.id.tvEmail)).check(matches(withText(USER_EMAIL)));
}

public void testLoginActivityStarts() {
    onView(withId(R.id.btnLogout)).perform(click());
    intended(hasComponent(LoginActivity.class.getName()));
}
}

Answer 1

确保调用Intents.init()测试设置.这应该解决NullPointerException你所描述的:

java.lang.NullPointerException
at android.support.test.espresso.intent.Intents.resumedActivitiesExist(Intents.java:235)
at android.support.test.espresso.intent.Intents.intended(Intents.java:184)
at android.support.test.espresso.intent.Intents.intended(Intents.java:169)
at net.example.login.MainActivityTest.testLoginActivityStarts(MainActivityTest.java:46)

有关更多信息,请参阅有关Intents.init()的 javadoc