如何使用mockito实现虚拟？

Question

我的代码很简单：

public interface AccountService {
    public boolean verifyBalance(AccountInfo account);
}


public class MoneyTransferServiceBean implements MoneyTransferService {
    private AccountService accountService;

    class MoneyTransfer {
        private TransferRequest request;
        public MoneyTransfer(TransferRequest request) {
            this.request = request;
        }

        private void verifySrcBalance() throws TransferException {
            if (!accountService.verifyBalance("request")
                throw new TransferException("LOW_BALANCE_ERROR_MESSAGE");
        }

    }
}

我如何为accountService.verifyBalance（）

制作工具虚拟

我试着这个：

private MoneyTransferServiceBean moneyTransferService;
AccountService mockedAccountService = mock(AccountService.class);
doReturn(true).when(mockedAccountService).verifyBalance("request");
MoneyTransfer moneyTransfer = moneyTransferService.new MoneyTransfer(transferRequest);
moneyTransfer.verifySrcBalance();

但这没有生效。

Answer 1

通常doX（）方法用于模拟异常抛出和void方法。 其他用法由when（[method_call]）。thenX（）; 首先创建模拟并将模拟器放入带有setter或Whitebox的测试服务中：

MoneyTransferServiceBean moneyTransferService = new MoneyTransferServiceBean();
AccountService mockedAccountService = mock(AccountService.class);
Whitebox.setInternalState(moneyTransferService , "accountService", mockedAccountService);

你应该像这样模拟与模拟的互动：

when(mockedAccountService.verifyBalance(eq(accInfo)).thenReturn(true);
verify(mockedAccountService).verifyBalance(accInfo);
verifyNoMoreInteractions(mockedAccountService);

Mockito网站上有很好的例子可以解释这一切。