android 单元测试， 以sqlite测试为例

Android测试，测试activity，使用InstrumentationTestCase类
测试后台逻辑，使用 AndroidTestCase 类
Android单元测试，主要目的是为了保证复杂逻辑是否正常正确，以及依据TDD的原则，测试先于编码，理清代码编写的思路。
主要以AndroidTestCase类测试复杂逻辑来讲解：
以android sqlite数据库逻辑代码的测试为例。
数据库逻辑代码:

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Random;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.DatabaseUtils;
import android.database.sqlite.SQLiteDatabase;

import com.android.hanhan.R;

public class DatabaseService {
	private DatabaseHelper dbOpenHelper;
	protected static final String TBL_NAME = "article";
	protected static final String FIELD_ID = "id";
	protected static final String FIELD_TITLE = "title";
	protected static final String FIELD_CONTENT = "content";
	protected static final String FIELD_DELETE = "deleted";
	protected static final String FIELD_PUBLISHDATE = "publishdate";
	protected static final String FIELD_FAVORITE = "favorite";
	protected static final String FIELD_CLICKCOUNT = "clickcount";
	protected static final String FIELD_FAVORITEDATE = "favoritedate";

//构造器，初始数据库服务
	public DatabaseService(Context context) {
		dbOpenHelper = new DatabaseHelper(context);
	}

// 删除表
	public void dropTable(String taleName) {
		dbOpenHelper.getWritableDatabase().execSQL(
				"DROP TABLE IF EXISTS " + taleName);
	}
// 关闭数据库
	public void closeDB() {
		dbOpenHelper.getWritableDatabase().close();
	}
// 取得数据库TBL_NAME 表的所有数据
	public List<Map<String, Object>> fetchALLArticle() {
		SQLiteDatabase db = dbOpenHelper.getReadableDatabase();
		List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
		Cursor cur = db.query(TBL_NAME, new String[] {FIELD_ID, FIELD_TITLE, FIELD_CONTENT,
						FIELD_PUBLISHDATE,FIELD_FAVORITE ,FIELD_DELETE }, null, null, null,
						null, null);
		list = getListFromDb(list, cur);
		return list;
	}
// 取得数据库TBL_NAME表的数据个数
	public long getPageCount(){
		SQLiteDatabase db = dbOpenHelper.getReadableDatabase();
		return DatabaseUtils.queryNumEntries(db, TBL_NAME);
	}
// 根据分页尺寸和页数，取得数据列表	
	public  List<Map<String, Object>> fetchCustomArticle(long pageSize, long pageID) {
		SQLiteDatabase db = dbOpenHelper.getReadableDatabase();
		List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
		String sql = "select * from " + TBL_NAME +     
         " Limit "+String.valueOf((pageID-1)*pageSize)+" ,"+String.valueOf((pageID)*pageSize);
		Cursor cur = db.rawQuery(sql, null);
		list = getListFromDb(list, cur);
		return list;
	}
//取得数据列表方法
	private List<Map<String, Object>>  getListFromDb(List<Map<String, Object>> list, Cursor cur) {
		if(cur.moveToFirst()){
			do{
			Map<String, Object> map = new HashMap<String, Object>();
			map = addValueToMap(cur);
			list.add(map);
			}while(cur.moveToNext());
		}
		return list;
	}
// 将数据映射到map
	private Map<String, Object> addValueToMap(Cursor cur) {
		Map<String, Object> map = new HashMap<String, Object>();
		map.put("id", cur.getString(cur.getColumnIndex(FIELD_ID)));
		map.put("title", cur.getString(cur.getColumnIndex(FIELD_TITLE)));
		map.put("info", cur.getString(cur.getColumnIndex(FIELD_PUBLISHDATE)));
		map.put("content", cur.getString(cur.getColumnIndex(FIELD_CONTENT)));
		map.put("publishdate", cur.getString(cur.getColumnIndex(FIELD_PUBLISHDATE)));
		map.put("favorite", cur.getString(cur.getColumnIndex(FIELD_FAVORITE)));
		map.put("delete", cur.getString(cur.getColumnIndex(FIELD_DELETE)));
		map.put("img", R.drawable.stop);
		return map;
	}
	
}

数据库单元测试代码，测试数据取得所有数据方法和 getPageCount()方法

import android.test.AndroidTestCase;
import com.android.hanhan.util.DatabaseService;

public class DatabaseServiceTest extends AndroidTestCase{
	private DatabaseService dbs;
	
	@Override
	protected void setUp() throws Exception {
		dbs = new DatabaseService(getContext());
	}

	@Override
	protected void tearDown() throws Exception {
		dbs.closeDB();
	}
	
	public void testPageCount() throws Exception{
		assertEquals(12, dbs.getPageCount());
	}
	
	public void testFetchALLArticle() throws Exception{
		assertEquals(12, dbs.fetchALLArticle().size());
	}
	
}

如果为绿色，则通过；红色，表示不通过
如出错，android junit test会有详细的错误信息，方便更正，更能确保程序的健壮

当然需要配置AndroidManifest.xml 文件

<!-- android 单元测试需要添加的内容  -->
<uses-library android:name="android.test.runner" />
<instrumentation android:targetPackage="com.android.abc"  
   android:label="Test Sqlite" android:name="android.test.InstrumentationTestRunner">
</instrumentation>