通达信更换交易接口-如何mock接口类_ 股票程序化软件自动交易接口

如何模拟实现多个接口的对象

当一个java类实现多个接口时，模拟和设置其接口类型的期望并不困难。Mockito提供了一些有用的方法Mockito.withSettings().extraInterfaces来克服这个困难。让我们看看下面的例子。

Java类实现多个接口的示例

package com.wsq;

public class UserImpl implements User, Customer {

    @Override
    public String getCustomerName(String Id) {
        return 'MyCustomer';
    }

    @Override
    public String getUserName(String Id) {
        return 'MyUser';
    }

}

JunitTest类来模拟和测试UserImpl类

package com.wsq;

import junit.framework.Assert;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Matchers;
import org.mockito.Mockito;
import org.powermock.api.mockito.PowerMockito;
import org.powermock.modules.junit4.PowerMockRunner;

@RunWith(PowerMockRunner.class)
public class UserTest {
    
    private User mockWithTestData() {
        
        User user = PowerMockito.mock(UserImpl.class , 
             Mockito.withSettings().extraInterfaces(Customer.class));
                
        PowerMockito.when(
             user.getUserName(Matchers.eq('test'))).thenReturn('TestUser');
        
        Customer customer = (Customer) user;
        
        PowerMockito.when(
             customer.getCustomerName(Matchers.eq('test'))).thenReturn('TestCustomer');
        
        return user;
    }
    
        
    @Test
    public void testNames() throws Exception {
        
        // Test 1 : with test data
        
        UserImpl userImplMock = (UserImpl) mockWithTestData();
        
        String userName = userImplMock.getUserName('test');
        String customerName = userImplMock.getCustomerName('test');
        
        Assert.assertEquals('TestUser', userName);
        Assert.assertEquals('TestCustomer', customerName);
        
        logOutput('1 : With Mock Data', userName, customerName);
        
        // Test 2 : with implementation data
        UserImpl user = new UserImpl();
        
        userName = user.getUserName('12345');
        customerName = user.getCustomerName('12345');
        
        Assert.assertEquals('MyUser', userName);
        Assert.assertEquals('MyCustomer', customerName);
        
        logOutput('2 : With Real Data', userName, customerName);
        
    }
        

    private void logOutput(String testCase, String userName, String customerName) {
        
        System.out.println('***** Test '+testCase +' ***** :');
        System.out.println('userName :' +userName);
        System.out.println('customerName :' +customerName);
        System.out.println('
');
    }

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