单元测试

端到端测试(非单元测试)
将系统作为一个整体来测试
运行速度慢
无法隔离与定位问题
 
 
 
什么不是单元测试: 网络 文件IO 数据库
 
临时单元测试: 打印语句 日志 调试器
 
 
格式
//Given
...
//When
...
//Then
 
单元测试DEMO
main.FizzBuzz.java 
 1 package main;
 2 
 3 /**
 4 * Created by SHINE on 7/20/2017.
 5 */
 6 public class FizzBuzz {
 7   public static String fizzBuzz(int number) {
 8     return "Fizz";
 9   }
10 }

test.FizzBuzzTest.java 

 1 package test;
 2 
 3 import main.FizzBuzz;
 4 import org.hamcrest.core.IsEqual;
 5 import org.junit.Test;
 6 
 7 import static org.hamcrest.MatcherAssert.assertThat;
 8 import static org.hamcrest.core.IsEqual.equalTo;
 9 
10 
11 /**
12 * Created by SHINE on 7/20/2017.
13 */
14 public class FizzBuzzTest {
15   @Test
16   public void should_return_Fizz_when_number_is_divisible_by_3() throws Exception{
17     //Given
18     int number = 3;
19     //When
20     String result = FizzBuzz.fizzBuzz(number);
21     //Then
22     assertThat(result, equalTo("Fizz"));
23   }
24 
25   @Test
26   public void should_return_Buzz_when_number_is_divisible_by_5() throws Exception {
27     //Given
28     int number = 5;
29     //When
30     String result = FizzBuzz.fizzBuzz(number);
31     //Then
32     assertThat(result, equalTo("Buzz"));
33
34   }
35 
36   @Test
37   public void should_return_FizzBuzz_when_number_is_divisible_by_15() throws Exception {
38     //Given
39     int number = 15;
40     //When
41     String result = FizzBuzz.fizzBuzz(number);
42     //Then
43     assertThat(result, equalTo("FizzBuzz"));
44   }
45 
46   @Test
47   public void should_return_itself_when_number_is_undivisible_by_3_5() throws Exception {
48     //Given
49     int number = 1;
50     //When
51     String result = FizzBuzz.fizzBuzz(number);
52     //Then
53     assertThat(result, equalTo("1"));
54   }
55 }

 

posted @ 2017-11-08 11:11  南瓜1996  阅读(222)  评论(0编辑  收藏  举报