java - GAE 测试环境中的数据存储在 JUnit 测试之间泄漏数据

Question

我想使用 Junit 在本地对 Google App Engine 进行一些自动化数据存储测试。

我编写了一个类“Agent.java”，其中包含三个字符串“name”、“owner”和“url”。类“Player”是抽象的，但不提供附加属性。

public class Agent extends Player implements Serializable {

/** to serialize Agent */
private static final long serialVersionUID = -6859912740484191335L;

/** The name of the Agent is the key-element of the agent-class*/
@Id String name;
/** Url to the Agent */
String url;

@Index String owner;
...

其次是 Setter 和 Getter。

我已将 4 个所需的库从 sdk 1.6.0 复制到项目“war/WEB-INF/lib”文件夹中，并包含 Junit4 容器。

我的测试类如下所示:

import static org.junit.Assert.*;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.logging.Logger;

import org.junit.BeforeClass;
import org.junit.AfterClass;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import com.google.appengine.api.datastore.DatastoreService;
import com.google.appengine.api.datastore.DatastoreServiceFactory;
import com.google.appengine.api.datastore.Entity;
import com.google.appengine.api.datastore.Query;
import com.google.appengine.api.datastore.Query.FilterOperator;
import com.google.appengine.tools.development.testing.LocalDatastoreServiceTestConfig;
import com.google.appengine.tools.development.testing.LocalServiceTestHelper;
import com.google.code.twig.annotation.AnnotationObjectDatastore;

public class AgentContrTest {

private static final Logger log = Logger.getLogger("AgentContrTest.class");

private static UserController uc;   
private static GameController gc;
private static AgentController ac;

private static final LocalServiceTestHelper helper =
        new LocalServiceTestHelper(new LocalDatastoreServiceTestConfig());

private  AnnotationObjectDatastore datastore = new AnnotationObjectDatastore(false);    


@BeforeClass 
public static void setUpOnce()  {

    gc = GameController.getInstance();
    uc = UserController.getInstance();
    ac = AgentController.getInstance();

}

@Before
public void setUp()  {
    helper.setUp();
    try {
        uc.register("userForTest", "test", "test@gmail.de", false);

    }
     catch (NameExistsException ne) {
     }
    catch (EmailFormatException ee) {
     }
}

 @After
 public void tearDown() {
  helper.tearDown();
}

 // Testing the raising of NameExistsException in createAgent(String name, String url, String owner)
 @Test(expected=NameExistsException.class)
 public void testCreateAgentExc1() throws NameExistsException {

     Agent ag1 = ac.createAgent("Agent1", "www.agent1.com", "Owner1");
     Agent ag2 = ac.createAgent("Agent1", "www.agent2.com", "Owner2"); 
 }

// Testing getAgents()
@Test
public void testGetAgents1() throws NameExistsException {
    datastore.disassociateAll();
    ArrayList<Agent> agents1 = ac.getAgents();

    ac.createAgent("Agent1", "www.agent1.com", "Owner1");
    ac.createAgent("Agent2", "www.agent2.com", "Owner2"); 
    ac.createAgent("Agent3", "www.agent3.com", "userForTest"); 

    ArrayList<Agent> agents2 = ac.getAgents();

    assertTrue(agents1.size()==0);
    assertTrue(agents2.size()==3);
    datastore.disassociateAll();
 }

 // Testing getAgents(String user)
 @Test
 public void testGetAgents2() throws NameExistsException {
   ArrayList<Agent> agents = ac.getAgents();
   assertTrue(agents.size()==0);
   datastore.disassociateAll(); 

   ac.createAgent("Agent1", "www.agent1.com", "Owner1");
   ac.createAgent("Agent2", "www.agent2.com", "Owner2"); 
   ac.createAgent("Agent3", "www.agent3.com", "userForTest"); 


   ArrayList<Agent> agents2 = ac.getAgents("userForTest");

   assertTrue(agents2.size()==1);
 }

这些是我正在测试的 AgentController 中的函数:

public ArrayList<Agent> getAgents(String user) {

    ArrayList<Agent> agents = new ArrayList<Agent>();

    Iterator<Agent> agentIterator = datastore.find().type(Agent.class)
            .addFilter("owner", FilterOperator.EQUAL, user)
            .now();

    while (agentIterator.hasNext()) {
        agents.add(agentIterator.next());
    }

    return agents;

}

public Agent createAgent(String name, String url, String owner) throws NameExistsException {

    Agent agent = datastore.load(Agent.class, name);
    if (agent != null)
        throw new NameExistsException();

    agent = new Agent();
    agent.setName(name);
    agent.setUrl(url);
    agent.setOwner(owner);

    datastore.store(agent);

    return agent;

}

testCreateAgentExc1 工作正常。但是 testGetAgents2() 抛出了 NameExistsException，这是它不应该做的。如果我将此测试中的代理重命名为“Agent4”到“Agent6”，它就可以正常工作。

由于 'http://code.google.com/intl/de-DE/appengine/docs/java/tools/localunittesting.html '数据存储区应删除测试之间的所有数据，因此不应引发 NameExistsException。

Answer 1

您没有在测试之间重置datastore对象。我不确定 twig 是如何工作的，但它(或其配置)是泄漏的原因。