我的测试类:
@RunWith(AndroidJUnit4.class)
public class MainActivityTest {
@Rule
public ActivityScenarioRule<MainActivity> rule = new ActivityScenarioRule<>(MainActivity.class);
ActivityScenario<MainActivity> scenario;
Context context = ApplicationProvider.getApplicationContext();
@Before
public void launchActivity() {
scenario = ActivityScenario.launch(MainActivity.class);
scenario.moveToState(Lifecycle.State.CREATED);
}
@Test
public void sendLocationButton_clicked_activateLongClickToastAppear() {
onView(withId(R.id.location_button)).perform(click());
onView(withText("Long press it")).inRoot(withDecorView(not(is(getActivity(context).getWindow().getDecorView())))).check(matches(isDisplayed()));
}
@After
public void tearDown() throws Exception {
scenario.close();
}
}
错误:
java.lang.AssertionError: Activity never becomes requested state "[DESTROYED, RESUMED, CREATED, STARTED]" (last lifecycle transition = "PRE_ON_CREATE")
at androidx.test.core.app.ActivityScenario.waitForActivityToBecomeAnyOf(ActivityScenario.java:338)
at androidx.test.core.app.ActivityScenario.launchInternal(ActivityScenario.java:272)
at androidx.test.core.app.ActivityScenario.launch(ActivityScenario.java:195)
at androidx.test.ext.junit.rules.ActivityScenarioRule.lambda$new$0$ActivityScenarioRule(ActivityScenarioRule.java:70)
at androidx.test.ext.junit.rules.ActivityScenarioRule$$Lambda$0.get(Unknown Source:2)
at androidx.test.ext.junit.rules.ActivityScenarioRule.before(ActivityScenarioRule.java:103)
at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:46)
at org.junit.rules.RunRules.evaluate(RunRules.java:20)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
这只是错误的一部分,因为栈溢出不允许在问题中发布如此庞大的代码。
我想测试当单击按钮时是否会显示Toast消息。对于发生了什么毫无头绪。请帮忙。先感谢您。