使用Espresso进行UI测试

package com.example.lenovo.uitest;

import android.support.test.rule.ActivityTestRule;
import android.support.test.runner.AndroidJUnit4;
import android.test.suitebuilder.annotation.LargeTest;

import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;

import static android.support.test.espresso.Espresso.onView;
import static android.support.test.espresso.action.ViewActions.click;
import static android.support.test.espresso.action.ViewActions.closeSoftKeyboard;
import static android.support.test.espresso.action.ViewActions.typeText;
import static android.support.test.espresso.assertion.ViewAssertions.matches;
import static android.support.test.espresso.matcher.ViewMatchers.withId;
import static android.support.test.espresso.matcher.ViewMatchers.withText;


@RunWith(AndroidJUnit4.class)
@LargeTest
public class MainActivityInstrumentedTest {
    private static final String STRING_To_Be_TYPED = "Jason";
    @Rule
    public ActivityTestRule<MainActivity> mainActivityTestRule = new ActivityTestRule<MainActivity>(MainActivity.class);

    @Test
    public void sayhello() {
        onView(withId(R.id.editText)).perform(typeText(STRING_To_Be_TYPED), closeSoftKeyboard());
        onView(withText("say hello")).perform(click());
        String expectedText = "Hello," + STRING_To_Be_TYPED + "!";
        onView(withId(R.id.textView)).check(matches(withText(expectedText)));

    }
}

点击测试类右击选择运行，若测试通过，出现：