Junit单元测试数据生成工具类

在Junit单元测试中，经常需要对一些领域模型的属性赋值，以便传递给业务类测试，常见的场景如下：

 com.enation.javashop.Goods goods = new  com.enation.javashop.Goods();
        goods.setBrandId(1);
        goods.setCategoryId(1);
        goods.setGoodsName("测试商品");
        goods.setPrice(1.01);
        goods.setSn("100001");
        goods.setWeight(1.01);

如果领域模型的属性特别多，手工去写set方法令人发指，写了一个生成的工具类，用法如下：

String mockCode = MockDataGenerator.create(Goods.class);

生成结果：

com.enation.javashop.Goods goods = new com.enation.javashop.Goods();
goods.setBrandId(819);
goods.setCategoryId(109);
goods.setCost(1.01);
goods.setGoodsId(970);
goods.setGoodsName("random_str748");
goods.setGoodsTransfeeCharge(164);
goods.setHaveSpec(506);
goods.setIntro("random_str344");
goods.setMarketEnable(878);
goods.setMktprice(1.01);
goods.setPrice(1.01);
goods.setSn("random_str316");
goods.setWeight(1.01);

工具类代码：

package com.enation.app.javashop.saas;

import com.enation.app.javashop.framework.util.StringUtil;
import org.springframework.beans.BeanUtils;

import java.beans.PropertyDescriptor;

/**
 * 模拟数据生成器
 * @author kingapex
 * @version 1.0
 * @since 7.1.0
 * 2019-08-06
 */

public class MockDataGenerator {

    public static String create(Class clz) {

        StringBuffer mockStr = new StringBuffer();

        PropertyDescriptor[] propertyDescriptors = BeanUtils.getPropertyDescriptors(clz);
        String objName = clz.getSimpleName();
        char[] chars =objName.toCharArray();
        chars[0]+=32;
        objName = String.valueOf(chars);
        mockStr.append(clz.getName() + " "+ objName+" = new "+ clz.getName()  +"();\n");
        for (PropertyDescriptor descriptor : propertyDescriptors) {
            if (descriptor.getWriteMethod() != null) {

                String name = descriptor.getWriteMethod().getName();
                String value = createValue( descriptor.getPropertyType());
                mockStr.append(objName + "." + name + "(" + value + ");\n");

            }

        }

         return mockStr.toString();
    }

    private static String createValue( Class clz) {

        if (clz.equals(java.lang.Integer.class)) {
            return StringUtil.getRandStr(3);
        }

        if (clz.equals(java.lang.Double.class)) {
            return "1.01";
        }

        if (clz.equals(java.lang.String.class)) {
            return "\"random_str"+ StringUtil.getRandStr(3)+"\"";
        }

        return "";
    }

}

原文地址：https://www.cnblogs.com/javashop-docs/p/11526652.html