Getting started with Android: unit test

I. JUnit test for Android

We have used JUnit in general, and JUnit for Android is similar. The results are green and red.

The overall unit test framework is as follows:

 

Here we will only introduce one of the classes: androidtestcase;

2. androidtestcase

 

Program Description: Create an android project: Activity, add an edittext, and do nothing else;

import android.app.Activity;import android.os.Bundle;import android.widget.EditText;public class MainActivity extends Activity {private EditText et1;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        et1 = (EditText)this.findViewById(R.id.et1);        if(savedInstanceState!=null){        et1.setText(savedInstanceState.getString("name"));        }    }    public int add(int a,int b){    return a+b;    }}

 

There are usually two methods for unit testing:

(1) directly create a unit test under the project

(2) create an android test project

 

1. directly create a unit test class

Step 1: Add the following in androidmanifest. xml:

<Application Android: icon = "@ drawable/ic_launcher" Android: Label = "@ string/app_name"> <uses-library Android: Name = "android. test. runner "/> // Add this line of code </Application>

 

 

<Application/> <instrumentation Android: Name = "android. Test. instrumentationtestrunner" Android: targetpackage = "org. xiazdong"/> // package of the activity to be tested

Step 2: Add a unit test class

Import Org. xiazdong. mainactivity; import android. content. context; import android. test. androidtestcase; import android. widget. edittext; public class mainactivitytest extends androidtestcase {private mainactivity; private context; @ overrideprotected void setup () throws exception {super. setup (); mainactivity = new mainactivity (); // directly create the activity instance context = This. getcontext (); // obtain the context} // test the add method public void testadd () {mainactivity MA = new mainactivity (); int A = ma. add (2, 3); assertequals (5, );}}

 

Test;

 

2. Create a unit test project

The advantage is that you can directly create a test class without configuring androidmanifest. xml;

 

 

Note: This type of unit test only involves business logic, so you cannot use View-related functions such as findviewbyid. Here, we only test a business function: Add;