error, fault, failure 的不同

case1:

1. Identify the fault.

for循环中的条件判断应为:(int i=x.length-1; i > =0;i–);

2. If possible, identify a test case that does not execute the fault. (Reachability)

test: x=[];

(抛出空指针异常,没有执行下面的程序,则没有执行fault)

3. If possible, identify a test case that executes the fault, but does not result in an error state.

test: x=[3, 2, 5]; y = 2

Expected= 1

(执行了含有fault的程序,但是并没有产生错误,即执行了fault,没有执行error)

4. If possible identify a test case that results in an error, but not a failure.

test: x=[3, 2, 5]; y = 1 Expected = -1

(没有遍历x=1,直接返回了-1,因此执行了error,没有执行failure。)

case2:

1、 Identify the fault.

for循环中的条件判断应为:(int i=x.length-1; i > =0; i–);

2、 If possible, identify a test case that does not execute the fault. (Reachability)

test: x=[];

(抛出空指针异常,没有执行下面的程序,则没有执行fault)

3、 If possible, identify a test case that executes the fault, but does not result in an error state.

test: x=[1, 2, 0]

Expected = 2

(执行了含有fault的程序,但是并没有产生错误,即执行了fault,没有执行error)

4、 If possible identify a test case that results in an error, but not a failure.

test: x=[3, 2, 5];

Expected = -1

(遍历到i=3时,返回了-1,不符合设计目的,因此执行了error,没有执行failure。)

posted @ 2018-03-15 22:19  齐某人qg  阅读(300)  评论(0编辑  收藏  举报