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健壮性最强，考虑情况最全面

### Decision Tables 决策表法，又称判定表法 ###

* 前言

* 一、认识决策表

* 二、例题

* * * 例题一

* 例题二

* 例题三

* 例题四

* 例题五

* 例题六

* 总结

--------------------

# 前言 #

# 一、认识决策表 #

> * 决策表就是判定表，决策表法也称判定表驱动法；是分析和表达多逻辑条件下执行不同操作的情况的工具。

> * 决策表能够将各种复杂情况都列举出来，不会产生遗漏，因此，使用决策表设计出的测试用例是完整的测试用例集合。

> * 在所有的功能测试方法中，基于决策表的测试方法是最严格的，因为决策表本身加强了逻辑的严密性

> * 它们非常适合描述在不同条件集下采取许多行动组合的情况。

* 判定表的组成：

* 通常由四部分组成：条件桩，动作桩，条件项，动作项

* ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzY0OTk5Nw_size_16_color_FFFFFF_t_70_pic_center]

* 条件桩：列出问题的所有条件

* 动作桩：列出问题规定所采取的操作

* 条件项：针对条件桩给出的条件，列出所有可能情况下的真假值

* 动作项：列出在条件项的各种取值情况下应该采取的动作

* 规则：任何一个条件组合的特定取值即相应要执行的操作成为一条规则，决策表中一列就是一条规则

决策表阅读指南：

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzY0OTk5Nw_size_16_color_FFFFFF_t_70_pic_center 1]`创建判定表的步骤`

1. 列出条件桩和动作桩的内容

2. 确定规则的个数；如果有n个条件，判定表有2^n规则

3. 填入条件项

4. 填入动作项

5. 合并

6. 例：

![在这里插入图片描述][2020111219531465.png_pic_center]

`解答`

> ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzY0OTk5Nw_size_16_color_FFFFFF_t_70_pic_center 2]

> ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzY0OTk5Nw_size_16_color_FFFFFF_t_70_pic_center 3]

# 二、例题 #

### 例题一 ###

学生一共考三门课程：语数英，如果有一门或以上课程不及格，就将这三门课程打印出来，否则输出信息W；使用决策表法设计测试用例。

`答案：`

> ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzY0OTk5Nw_size_16_color_FFFFFF_t_70_pic_center 4]

> ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzY0OTk5Nw_size_16_color_FFFFFF_t_70_pic_center 5]

### 例题二 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzY0OTk5Nw_size_16_color_FFFFFF_t_70_pic_center 6]

`答案`

> ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzY0OTk5Nw_size_16_color_FFFFFF_t_70_pic_center 7]

> ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzY0OTk5Nw_size_16_color_FFFFFF_t_70_pic_center 8]

### 例题三 ###

三角形问题：

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzY0OTk5Nw_size_16_color_FFFFFF_t_70_pic_center 9]

### 例题四 ###

Consider a method fp, brief for findPrice, that takes two inputs code and qty. The item code is represented by the integer code and the quantity purchased by another integer variable qty. fp accesses a database to find and display the unit price, the description, and the total price of the item corresponding to code. fp is required to display an error message, and return, if either of the two inputs is incorrect. Assuming that an item code must be in the range 99…999 and quantity in the range 1…100.

Please give your test cases using boundary-value analysis.

`答案`

> ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzY0OTk5Nw_size_16_color_FFFFFF_t_70_pic_center 10]

### 例题五 ###

Develop a decision table for the YesterDate function.

`解答`

> ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzY0OTk5Nw_size_16_color_FFFFFF_t_70_pic_center 11]

> ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzY0OTk5Nw_size_16_color_FFFFFF_t_70_pic_center 12]

> ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzY0OTk5Nw_size_16_color_FFFFFF_t_70_pic_center 13]

> ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzY0OTk5Nw_size_16_color_FFFFFF_t_70_pic_center 14]

### 例题六 ###

下一天函数

![在这里插入图片描述][20201112200306590.png_pic_center]![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzY0OTk5Nw_size_16_color_FFFFFF_t_70_pic_center 15]

# 总结 #

![20201112195511521.png_pic_center][]

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[2020111219531465.png_pic_center]: /images/1611502738397.png

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[20201112200306590.png_pic_center]: /images/1611502387069.png

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[20201112195511521.png_pic_center]: /images/1611502349278.png