测试 | 单元测试工具 | JUnit | 参数化

被测试类：

package project;

public class MyCalendar2 {
     public int getNumberOfDaysInMonth(int year, int month) {
            if (month == 1 || month == 3 || month == 6 || month == 7 ||
              month == 8 || month == 10 )
              return 31;
            if (month == 4 || month == 5 || month == 9 || month == 11)
              return 30;
            if (month == 2) return  28;
            return 0; // If month is incorrect
          }
}

设计测试数据：

输入	预计输出
2018  1	31
2018  2	28
2018  3	31
2018  4	30
2018  5	31
2018  6	30
2018  7	31
2018  8	31
2018  9	30
2018  10	31
2018  11	30
2018  12	31
2018  13	0
2008  2	29

　　

一般测试：

package project;

import static org.junit.Assert.*;

import org.junit.Test;

/**
 *
 * @author weiTangzhao
 * @Time
 *
 */
public class MyCalendar2Test {

    MyCalendar2 m = new MyCalendar2();
    @Test
    public void testGetNumberOfDaysInMonth1(){
        int days = m.getNumberOfDaysInMonth(2018, 1);
        assertEquals(31, days);
    }

    @Test
    public void testGetNumberOfDaysInMonth2(){
        int days = m.getNumberOfDaysInMonth(2008, 2);
        assertEquals(29, days);
    }

    @Test
    public void testGetNumberOfDaysInMonth21(){
        int days = m.getNumberOfDaysInMonth(2018, 2);
        assertEquals(28, days);
    }
    @Test
    public void testGetNumberOfDaysInMonth3(){
        int days = m.getNumberOfDaysInMonth(2018, 3);
        assertEquals(31, days);
    }

    @Test
    public void testGetNumberOfDaysInMonth4(){
        int days = m.getNumberOfDaysInMonth(2008, 4);
        assertEquals(30, days);
    }

    @Test
    public void testGetNumberOfDaysInMonth5(){
        int days = m.getNumberOfDaysInMonth(2018, 5);
        assertEquals(31, days);
    }

    @Test
    public void testGetNumberOfDaysInMonth6(){
        int days = m.getNumberOfDaysInMonth(2018, 6);
        assertEquals(30, days);
    }

    @Test
    public void testGetNumberOfDaysInMonth7(){
        int days = m.getNumberOfDaysInMonth(2018, 7);
        assertEquals(31, days);
    }

    @Test
    public void testGetNumberOfDaysInMonth8(){
        int days = m.getNumberOfDaysInMonth(2018,8);
        assertEquals(31, days);
    }
    @Test
    public void testGetNumberOfDaysInMonth10(){
        int days = m.getNumberOfDaysInMonth(2018, 10);
        assertEquals(31, days);
    }

    @Test
    public void testGetNumberOfDaysInMonth9(){
        int days = m.getNumberOfDaysInMonth(2018, 9);
        assertEquals(30, days);
    }

    @Test
    public void testGetNumberOfDaysInMonth11(){
        int days = m.getNumberOfDaysInMonth(2018, 11);
        assertEquals(30, days);
    }
    @Test
    public void testGetNumberOfDaysInMonth12(){
        int days = m.getNumberOfDaysInMonth(2018, 12);
        assertEquals(31, days);
    }

    @Test
    public void testGetNumberOfDaysInMonth13(){
        int days = m.getNumberOfDaysInMonth(2018, 13);
        assertEquals(0, days);
    }

}

参数化测试：

package project;

import static org.junit.Assert.*;

import java.util.Arrays;
import java.util.Collection;

import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;

@RunWith(Parameterized.class)
public class MyCalendar2Test2 {  

    private int input1;
    private int input2;
    private int expected;  

    /**
     * 准备数据。数据的准备需要在一个方法中进行，该方法需要满足一定的要求： 

         1）该方法必须由Parameters注解修饰
         2）该方法必须为public static的
         3）该方法必须返回Collection类型
         4）该方法的名字不做要求
         5）该方法没有参数
     * @return
     */
    @Parameters
    @SuppressWarnings("unchecked")
    public static Collection prepareData(){
        Object[][] object = {{2018,1,31},{2018,2,28},{2018,3,31},{2018,4,30},{2018,5,31},{2018,6,30},
                {2018,7,31},{2018,8,31},{2018,9,30},{2018,10,31},{2018,11,30},{2018,12,31},{2018,13,0},{2008,2,29}};  

        return Arrays.asList(object);
    }  

    public MyCalendar2Test2(int input1,int input2,int expected){
        this.input1 = input1;
        this.input2 = input2;
        this.expected = expected;
    }  

    @Test
    public void testGetNumberOfDaysInMonth(){
        MyCalendar2 m = new MyCalendar2();
        int result = m.getNumberOfDaysInMonth(input1,input2);
        Assert.assertEquals(expected,result);
    }  

}

参考博客：

https://www.cnblogs.com/byron0918/p/4801152.html