junit 4学习

JUNIT 4中,有几个地方要注意一下的,归纳之
1

@Test(expected=ArithmeticException.class) 

public void

3,Math.divide(9,3));   
   Math.divide(10,0); //除数不能为0，会抛出异常   
   }   
  junit4中不用try catach了,用这样声明​​“@Test(expected=ArithmeticException.class)”Junit4​​就会检查此方法是否抛出ArithmeticException异常，
2)
   套件方面
  

import
import
import
@RunWith(Suite.class)   
@SuiteClasses({a.class,   
class})   
   public class
}

则a,b两个类都要运行测试

3) 参数化测试

import static org.junit.Assert.assertEquals;

import org.junit.Test;

import org.junit.runner.RunWith;

import org.junit.runners.Parameterized;

import org.junit.runners.Parameterized.Parameters;

 

import java.util.Arrays;

import java.util.Collection;

 

@RunWith(Parameterized.class)

public class SquareTest ...{

 

    private static Calculator calculator = new Calculator();

    private int param;

    private int result;

 

    @Parameters

    public static Collection data() ...{

        return Arrays.asList(new Object[][]...{

                ...{2, 4},

                ...{0, 0},

                ...{－3, 9},

        });

    }

 

 

//构造函数，对变量进行初始化

    public SquareTest(int param, int result) ...{

        this.param = param;

        this.result = result;

    }

 

    @Test

    public void square() ...{

        calculator.square(param);

        assertEquals(result, calculator.getResult());

    }

 

}