如何使用单元测试来测试一个按钮，启动了正确的活动 [英] How to use unit testing to test that a button launches the correct Activity

问题描述

我想写一个单元测试，将测试如果一个按钮启动被点击时正确的活动，但我有麻烦找出正确的code使用。 该testButton方法不运行，通过测试，但它随后导致错误：

  [2012-02-29十六点18分08秒 -  TroubleShootingAppTest]试运行失败：仪器仪表运行失败，原因是java.lang.RuntimeException的
 

测试那么早结束。任何人都可以请指教一下正确的code应该是什么？

这是我有：

 包com.integral.troubleshooter.test;

进口com.integral.troubleshooter.Question;
进口com.integral.troubleshooter.R;
进口com.integral.troubleshooter.TroubleShooterActivity;

进口android.app.Activity;
进口android.content.Intent;
进口android.test.ActivityInstrumentationTestCase2;
进口android.text.Layout;
进口android.view.View;
进口android.widget.Button;
进口android.widget.ImageView;
进口android.widget.Spinner;
进口android.widget.TextView;

公共类TroubleShooterActivityTest扩展
    ActivityInstrumentationTestCase2＆LT; TroubleShooterActivity＆GT; {

私人TroubleShooterActivity mActivity;
私人按钮mButton;
私人TextView的mTextView;
私人ImageView的mImageView;
私人字符串资源字符串;
私人活动nextActivity;

公共TroubleShooterActivityTest（）{
    超（com.integral.troubleshooter.TroubleShooterActivity，TroubleShooterActivity.class）;
}

 / *
 *设定每个测试之前测试环境。
 * @see android.test.ActivityInstrumentationTestCase2＃设置（）
 * /
@覆盖
保护无效设置（）抛出异常{

    super.setUp（）;

    setActivityInitialTouchMode（假）;


    mActivity = getActivity（）;

    mButton =（按钮）mActivity.findViewById（R.id.troubleShooter）;

    mTextView =（TextView中）mActivity.findViewById（R.id.title）;

    mImageView =（ImageView的）mActivity.findViewById（R.id.IntegralLogo）;

    资源字符串= mActivity.getString（R.string.CustomerSupport）;
}

公共无效测试preconditions（）{
    assertTrue（mTextView！= NULL）;
    assertTrue（mImageView！= NULL）;
}

公共无效testText（）{
    的assertEquals（资源字符串（字符串）mTextView.getText（））;
}

公共无效testButton（）{
     mActivity.runOnUiThread（
                新的Runnable（）{
                    公共无效的run（）{
                       mButton.performClick（）;
                       nextActivity = getActivity（）;
                       的assertEquals（nextActivity，Question.class）;
                    }
                }
            ）;



}
}
 

解决方案

试着检查仪器不是present。运行此命令会以项目的环境present仪器的清单：

  $亚行外壳时列表仪器
 

我希望这帮助。

I am trying to write a unit test that will test if a button launches the correct activity when it is clicked, but I am having trouble figuring out the correct code to use. The testButton method does run and pass the tests, however it then causes an error:

[2012-02-29 16:18:08 - TroubleShootingAppTest] Test run failed: Instrumentation run failed due to 'java.lang.RuntimeException'

The testing then terminates early. Can anyone please advise what the correct code should be?

This is what I have:

package com.integral.troubleshooter.test;

import com.integral.troubleshooter.Question;
import com.integral.troubleshooter.R;
import com.integral.troubleshooter.TroubleShooterActivity;

import android.app.Activity;
import android.content.Intent;
import android.test.ActivityInstrumentationTestCase2;
import android.text.Layout;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Spinner;
import android.widget.TextView;

public class TroubleShooterActivityTest extends
    ActivityInstrumentationTestCase2<TroubleShooterActivity> {

private TroubleShooterActivity mActivity;
private Button mButton;
private TextView mTextView;
private ImageView mImageView;
private String resourceString;
private Activity nextActivity;

public TroubleShooterActivityTest() {      
    super("com.integral.troubleshooter.TroubleShooterActivity",        TroubleShooterActivity.class);    
}

 /*
 * Sets up the test environment before each test.
 * @see android.test.ActivityInstrumentationTestCase2#setUp()
 */
@Override
protected void setUp() throws Exception {

    super.setUp();

    setActivityInitialTouchMode(false);


    mActivity = getActivity();

    mButton = (Button)mActivity.findViewById(R.id.troubleShooter);

    mTextView =  (TextView)mActivity.findViewById(R.id.title);

    mImageView = (ImageView)mActivity.findViewById(R.id.IntegralLogo);

    resourceString = mActivity.getString(R.string.CustomerSupport); 
}

public void testPreconditions() {
    assertTrue(mTextView != null);
    assertTrue(mImageView != null);
}

public void testText(){
    assertEquals(resourceString,(String)mTextView.getText());
}

public void testButton(){
     mActivity.runOnUiThread(
                new Runnable() {
                    public void run() {
                       mButton.performClick();
                       nextActivity =  getActivity();
                       assertEquals(nextActivity, Question.class);
                    }
                }
            );



}
}

解决方案

Try to check if instrumentation is not present. Running this command will give a list of present instrumentation in your project environment:

$ adb shell pm list instrumentation

I hope this help.

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