篡改Junit的@Test注释

最新推荐文章于 2024-10-12 01:32:10 发布

刘利新西安

最新推荐文章于 2024-10-12 01:32:10 发布

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本文探讨了如何创建自定义注解，并展示了如何在Java中使用它们来增强代码的可读性和功能性。

注释是关于代码的代码，即关于程序本身的元数据。

package coupdetat;

import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.lang.annotation.Target;
import java.lang.annotation.ElementType;

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface Test {
    Class expected();
}

package coupdetat;

public class MyTest {
	
	@Test(expected=MyTest.class)
	public void LvDengXing(){
		System.out.println("Keep the bar green to keep the code clean");
	}

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub

	}

}

package coupdetat;

import java.lang.reflect.Method;

public class TestAnnotationParser {
    public void parse(Class<?> clazz) throws Exception {
        Method[] methods = clazz.getMethods();
        int pass = 0;
        int fail = 0;


    for (Method method : methods) {
        if (method.isAnnotationPresent(Test.class)) {
            // this is how you access to the attributes
            Test test = method.getAnnotation(Test.class);
            Class expected = test.expected();
            System.out.println(expected.getName());
            try {
                method.invoke(MyTest.class.newInstance(),null);
                method.invoke(expected.newInstance(),null);
                pass++;
            } catch (Exception e) {
                if (Exception.class != expected) {
                    fail++;
                } else {
                    pass++;
                }
            }
        }
    }
    }
}

package coupdetat;
public class Demo {
    public static void main(String [] args) throws Exception {
        TestAnnotationParser parser = new TestAnnotationParser();
        parser.parse(MyTest.class);
        // you can use also Class.forName 
        // to load from file system directly!
    }
}

运行结果：

coupdetat.MyTest
Keep the bar green to keep the code clean
Keep the bar green to keep the code clean

原文：http://isagoksu.com/2009/development/java/creating-custom-annotations-and-making-use-of-them/