单元测试、、、

1、activity_main中的xml中的布局
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2、MainActivity中的主代码
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package com.edu.niit.ceshi;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

}

public void sayHello(View v) {
TextView textView = (TextView) findViewById(R.id.textView);
EditText editText = (EditText) findViewById(R.id.editText);
textView.setText("Hello," + editText.getText().toString() + "!");
}
}
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3、单元测试布局程序

private static final String STRING_TO_BE_TYPED = "Peter";

@Rule
public ActivityTestRule

@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)));
}
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单元测试结果如上、、、、、