android - 单元测试小结（包括异步）

• 配置AndroidManifest: 

<!-- 测试相关 -->
<uses-permission android:name="android.permission.RUN_INSTRUMENTATION" />
<instrumentation android:name="android.test.InstrumentationTestRunner" 
        android:targetPackage="com.platomix.helloworld" 
        />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        
　　　　　<!-- 测试相关 -->　
        <uses-library android:name="android.test.runner" />
        
        <activity
            android:name="com.platomix.helloworld.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>
        
    </application>

这里要注意一点，android:targetPackage="com.platomix.helloworld"这个包名，用顶级包名，这样能测试所有包的内容。

• 创建一个继承于InstrumentationTestCase（AndroidTestCase也行，不过它没有runTestOnUiThread()这个用天异步的方法）的类。

  package com.platomix.test;
  
  import java.util.concurrent.CountDownLatch;
  
  import android.os.AsyncTask;
  import android.test.InstrumentationTestCase;
  
  public class SecordTest extends InstrumentationTestCase {
      private static final String TAG = "SecordTest.java";
  
      protected void setUp() throws Exception {
          super.setUp();
      }
  
      protected void tearDown() throws Exception {
          super.tearDown();
      }
      
      public void testFun() throws Exception {
          assertEquals(2, 2);
      }
      
      // 普通test
      public void testOfun() throws Exception {
          assertEquals(0, 10);
      }
      
      // 异步test
      public void testMyAsyncTask() throws Throwable{  
          // create  a signal to let us know when our task is done.
          final CountDownLatch signal = new CountDownLatch(1);
          
          // Execute the async task on the UI thread! THIS IS KEY!
          runTestOnUiThread(new Runnable() {
  
              @Override
              public void run() {
                  final AsyncTask<String, Void, String> myTask = new AsyncTask<String, Void, String>() {
  
                      @Override
                      protected String doInBackground(String... arg0) {
                          //Do something meaningful.
                          try {
                              Thread.sleep(2000);
                          } catch (InterruptedException e) {
                              // TODO Auto-generated catch block
                              e.printStackTrace();
                          }
                          return "something happened!";
                      }
  
                      @Override
                      protected void onPostExecute(String result) {
                          super.onPostExecute(result);
  
                          signal.countDown();
                      }
                  };
                  
                  myTask.execute("Do something");  
              }
          });  
          
          try {
              signal.await();
          } catch (InterruptedException e) {
              // TODO Auto-generated catch block
              fail();
              e.printStackTrace();
          }
      }
  }
  

• 到此就OK了。