Feed4Junit的简单使用（四）数据来自定义数据源

Feed4Junit官方地址：

http://databene.org/feed4junit.html

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Feed4Junit自动生成测试数据：

Feed4JUnit 1.1.1 发布了，该版本支持从 CSV 文件中导入完整的 JavaBean 图表。

利用Feed4JUnit能够很方便用随机但校验过的数据执行冒烟测试来提高代码 代码覆盖率和发现由非常特殊的数据结构产生的Bug。此外还可以利用Feed4JUnit轻松定义等价类测试。

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官方文档

Defining custom data sources

If you wish to retrieve data from other data source or file types, you can program a connector component, that inherits from the class Feed4JUnitGenerator and provides data:

public static class MyGenerator extends UnsafeMethodParamsGenerator {

??????? public Object[] generate() {
??????????? return new Object[] { 1, 2, 3 };
??????? }

}@RunWith(Feeder.class)
@Bean(id??? }
???@Bean(id@Bean(id

@Bean(idpackage com.easyway.feed4junit;import org.databene.benerator.util.UnsafeMethodParamsGenerator;import org.databene.benerator.wrapper.ProductWrapper;/** * * @author longgangbai * */public class MyGenerator extends UnsafeMethodParamsGenerator {@Overridepublic ProductWrapper<Object[]> generate(ProductWrapper<Object[]> paramProductWrapper) {return paramProductWrapper.wrap(generate());} public Object[] generate() { return new Object[] { 1, 2, 3 }; }}

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测试代码：

package com.easyway.feed4junit;import org.databene.benerator.anno.Bean;import org.databene.benerator.anno.InvocationCount;import org.databene.benerator.anno.Source;import org.databene.feed4junit.Feeder;import org.junit.Test;import org.junit.runner.RunWith;@RunWith(Feeder.class)@Bean(id = "mygen", type = MyGenerator.class)public class BeanSourceTest {        @Test    @Source("mygen")    @InvocationCount(5)    public void testArrayIterable(int n1, int n2, int n3) {        System.out.println(n1 + ", " + n2 + ", " + n3);    }    } 

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需要参数的数据源生成器：

package com.easyway.feed4junit;import org.databene.benerator.util.UnsafeMethodParamsGenerator;import org.databene.benerator.wrapper.ProductWrapper;/**?* 构造函数传参可以不需要get/set方法?* @author longgangbai?*?*/public class MyOtherGenerator extends UnsafeMethodParamsGenerator  {private int num;private String test;public MyOtherGenerator(int num,String test){this.num=num;this.test=test;}@Overridepublic ProductWrapper<Object[]> generate(ProductWrapper<Object[]> paramProductWrapper) {return paramProductWrapper.wrap(generate());} public Object[] generate() {         return new Object[] { 1, 2, 3 };     }} 

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测试代码如下：

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package com.easyway.feed4junit;import org.databene.benerator.anno.Bean;import org.databene.benerator.anno.InvocationCount;import org.databene.benerator.anno.Source;import org.databene.feed4junit.Feeder;import org.junit.Test;import org.junit.runner.RunWith;@RunWith(Feeder.class)@Bean(id = "mygen", spec = "new com.easyway.feed4junit.MyOtherGenerator(1, 'test')") public class BeanSourceConstructTest1 {        @Test    @Source("mygen")    @InvocationCount(5)    public void testArrayIterable(int n1, int n2, int n3) {        System.out.println(n1 + ", " + n2 + ", " + n3);    }    } 

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不带构造函数的且带属性的

package com.easyway.feed4junit;import org.databene.benerator.util.UnsafeMethodParamsGenerator;import org.databene.benerator.wrapper.ProductWrapper;/** * 非构造函数传参可以必须需要get/set方法 * UnsafeMethodParamsGenerator * @author longgangbai * */public class MyOtherGenerator2 extends UnsafeMethodParamsGenerator  {private int num;private String test;public MyOtherGenerator2(){}public int getNum() {return num;}public void setNum(int num) {this.num = num;}public String getTest() {return test;}public void setTest(String test) {this.test = test;}@Overridepublic ProductWrapper<Object[]> generate(ProductWrapper<Object[]> paramProductWrapper) {return paramProductWrapper.wrap(generate());} public Object[] generate() {         return new Object[] { 1, 2, 3 };     }} 

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测试类：

package com.easyway.feed4junit;import org.databene.benerator.anno.Bean;import org.databene.benerator.anno.InvocationCount;import org.databene.benerator.anno.Property;import org.databene.benerator.anno.Source;import org.databene.feed4junit.Feeder;import org.junit.Test;import org.junit.runner.RunWith;@RunWith(Feeder.class)@Bean(id = "mygen", type = MyOtherGenerator2.class, properties = {    @Property(name = "num", value = "1"),    @Property(name = "test", value="test")})public class BeanSourceConstructTest3 {        @Test    @Source("mygen")    @InvocationCount(5)    public void testArrayIterable(int n1, int n2, int n3) {        System.out.println(n1 + ", " + n2 + ", " + n3);    }    } 

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