JUnit Mockito在另一個類中模擬一種方法錯誤

Question

我使用Netbeans 8.1，Junit和Mockito爲我的項目編寫單元測試。 下面是我的一些代碼片段

要測試功能：

public Map<String, String> getAllUsers() { 

    if (allUsers == null) { 
     if (session.checkACL2("DonateBookPrivilegeLevel") || session.checkACL2("ManageUserPrivilegeLevel")) { 
      Iterator<User> it = userFc.findAll().iterator(); 
      System.out.println("PC::enum()"); 
      allUsers = new HashMap<String, String>(); 
      while (it.hasNext()) { 
       User item = it.next(); 
       allUsers.put(item.getName(), item.getUserId().toString()); 
      } 
     } 
    } 
    return allUsers; 
} 

我的測試類：

package com.controller; 

import com.entities.User; 
import com.jsfc.util.JsfUtil; 
import java.util.ArrayList; 
import java.util.List; 
import java.util.Map; 
import javax.faces.event.ActionEvent; 
import org.junit.After; 
import org.junit.AfterClass; 
import org.junit.Before; 
import org.junit.BeforeClass; 
import org.junit.Test; 
import static org.junit.Assert.*; 
import org.junit.runner.RunWith; 
import static org.mockito.Matchers.any; 
import static org.mockito.Matchers.anyInt; 
import static org.mockito.Matchers.anyObject; 
import static org.mockito.Matchers.anyString; 
import org.mockito.Mock; 
import org.mockito.Mockito; 
import static org.mockito.Mockito.doReturn; 
import static org.mockito.Mockito.mock; 
import static org.mockito.Mockito.spy; 
import static org.mockito.Mockito.when; 
import org.mockito.MockitoAnnotations; 
import org.mockito.runners.MockitoJUnitRunner; 


@RunWith(MockitoJUnitRunner.class) 
public class PersonalCenterControllerTest { 

    public PersonalCenterControllerTest() { 
    } 

    @BeforeClass 
    public static void setUpClass() { 

    } 

    @AfterClass 
    public static void tearDownClass() { 
    } 

    @Before 
    public void setUp() { 
     MockitoAnnotations.initMocks(this); 
    } 

    @After 
    public void tearDown() { 
    } 

    /** 
    * Test of getAllUsers method, of class PersonalCenterController. 
    */ 
    @Test 
    public void testGetAllUsers() { 
     System.out.println("getAllUsers"); 

     PersonalCenterController pcController = new PersonalCenterController(); 

     SessionController session = Mockito.mock(SessionController.class); 

     when(session.checkACL2(anyString())).thenReturn(true).thenReturn(true); 

     Map<String,String> userMap = null; 
     userMap = pcController.getAllUsers(); 

    } 
} 

正如你所看到的，我叫session.checkACL2（），這是定義在另一類中，我使用Using Mockito to mock a class method inside another class來修復

SessionController session = Mockito.mock(SessionController.class); 
doReturn(true).when(session).checkACL2((String) anyObject()); 

但是它ca如果在線，則爲。

Answer 1

你實際上傳遞嘲笑SessionController比如你PersonalCenterController實例？ 如果您嘗試在模擬後立即調用SessionController方法，它會返回您的預期結果嗎？

SessionController session = Mockito.mock(SessionController.class); 
when(session.checkACL2(anyString())).thenReturn(true).thenReturn(true); 
assertTrue(session.checkACL2("DonateBookPrivilegeLevel")); 
assertTrue(session.checkACL2("ManageUserPrivilegeLevel"); 

當我看到這裏NullPointerException可以從session實例將會是null或返回null，即再被轉換爲boolean。我的第一步是弄清楚它是哪一個。

Answer 2

確保您使用'MockitoJUnitRunner.class'運行您的JUnit。

@RunWith(MockitoJUnitRunner.class) 
public class MyClassTest{ 

public void myMethodTest(){ 
    SessionController session = Mockito.mock(SessionController.class); 
Mockito.when(session).checkACL2(Mockito.anyString()).thenReturn(true).thenReturn(true); 
    //Write logic to test your businesss logic inside class and assert the result. 
} 

}