Android JUnit test

Android单元测试步骤

1.修改AndroidManifest.xml文件.

添加instrumentation节点.其中name是固定值,targetPackage为需要测试的类所在的包.如:
        android:name="android.test.InstrumentationTestRunner"
        android:targetPackage="com.ahai.sqlitedemo"

　　  在application节点下添加 <uses-library android:name="android.test.runner" />

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.ahai.sqlitedemo"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

    <instrumentation
        android:name="android.test.InstrumentationTestRunner"
        android:targetPackage="com.ahai.sqlitedemo" >
    </instrumentation>

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.ahai.sqlitedemo.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <uses-library android:name="android.test.runner" />
    </application>

</manifest>

2.编写测试类,继承自AndroidTestCase. 此类可以引用getContext等方法,非常方便. 如:

package com.ahai.sqlitedemo;

import android.test.AndroidTestCase;

import com.ahai.sqlitedemo.dao.PersonDao;

public class SqlTestCase extends AndroidTestCase {

    public void insert() {
        Person person = new Person("xiaojiang");
        PersonDao personDao = new PersonDao(getContext());
        personDao.Insert(person);
    }
}

3.测试代码,如测试insert方法,在Package Explorer中,右击-Run As-Android JUnit Test.

4.常见错误

(1)Test run failed: Unable to find instrumentation target package:

出现这个错误是由于manifest中指定的package值,与android:targetPackage不一致导致.需要将两个修改为一致,并将测试类移到其中再测试.