如何使用Whitebox模拟私有方法（org.powermock.reflect）

我想模拟一个在另一个方法中调用的私有方法。

以下是我写的示例代码。

Java代码：

package org.mockprivatemethods; public class AccountDeposit { // Instantiation of AccountDetails using some DI AccountDetails accountDetails; public long deposit(long accountNum, long amountDeposited){ long amount = 0; try{ amount = accountDetails.getAmount(accountNum); updateAccount(accountNum, amountDeposited); amount= amount + amountDeposited; } catch(Exception e){ // log exception } return amount; } private void updateAccount(long accountNum, long amountDeposited) throws Exception { // some database operation to update amount in the account } // for testing private methods private int sum(int num1, int num2){ return num1+num2; } } class AccountDetails{ public long getAmount(long accountNum) throws Exception{ // some database operation returning amount in the account long amount = 10000L; return amount; } } 

识别TestClass：

 package org.mockprivatemethods; import static org.junit.Assert.assertTrue; import static org.mockito.Mockito.when; import org.junit.Assert; import org.junit.Test; import org.junit.runner.RunWith; import org.mockito.InjectMocks; import org.mockito.Mock; import org.mockito.Mockito; import org.powermock.modules.junit4.PowerMockRunner; import org.powermock.reflect.Whitebox; @RunWith(PowerMockRunner.class) public class TestAccountDeposit { @InjectMocks AccountDeposit accountDeposit; @Mock AccountDetails accountDetailsMocks; @Test public void testDposit() throws Exception{ long amount = 200; when(accountDetailsMocks.getAmount(Mockito.anyLong())) .thenReturn(amount); // need to mock private method updateAccount // just like we tested the private method "sum()" using Whitebox // How to mock this private method updateAccount long totalAmount = accountDeposit.deposit(12345678L, 50); assertTrue("Amount in Account(200+50): "+totalAmount , 250==totalAmount); } @Test public void testSum(){ try { int amount = Whitebox.invokeMethod(accountDeposit, "sum", 20, 30); assertTrue("Sum of (20,30): "+amount, 50==amount); } catch (Exception e) { Assert.fail("testSum() failed with following error: "+e); } } } 

我们可以使用Whitebox.invokeMethod()测试私有方法。 我的问题是：有没有办法使用Whitebox模拟私有方法。 我们可以编写类似于下面代码的东西来模拟updateAccount（），因为我不想在测试Deposit（）方法时执行任何数据库操作吗？

 when(accountDetailsMocks.getAmount(Mockito.anyLong())) .thenReturn(amount); 

任何帮助表示赞赏！ 谢谢！