Detailed explanation of the decision table method of common test case design methods

Theoretical part

Decision table is a tool to analyze and express different actions of the system under various input conditions , It can combine complex logical relationships with various The condition combination is expressed concretely and clearly .

Condition stake (Condition Stub)

Action post (Action Stub）

Condition item (Condition Entry）

Action items (Action Entry）

Steps to design use cases

1、 List all condition piles and action piles .

2、 Determine the number of rules . If there is one here 3 Conditions , Each condition has two values , So there should be 2×2×2=8 Rules .

3、 Fill in the conditions .

4、 Fill in the action pile and action item , Simplification , Merge similar rules .

5、 Turn each rule into a use case .

Related examples

Purchase movie tickets .

Condition stake

1、 Swipe Huaxia Credit Card ;

2、 Wednesday afternoon ;

3、 couples .

Action post

1、 Cinema ticket 8 fold ;

2、 Cinema ticket 7 fold ;

3、 Cinema ticket 5.6 fold ;

4、 Free tickets for girls .

Test case examples

1、 Non lovers don't swipe Huaxia information card on Wednesday afternoon , Conduct ticket purchase test ;

2、 Couples don't swipe Huaxia Credit Card on Wednesday afternoon , Conduct ticket purchase test .

Scope of application

1、 Multiple check boxes , At the same time choose , Do not select at the same time , Choose a part ;

2、 There are many kinds of logic in the function 、 Multiple relationships , When different conditions are combined , The corresponding results are different ;

3、 The logic processing process is complex . for example ： Control system 、 Game testing .

Advantages and disadvantages of the decision table

advantage

It can list complex problems one by one according to various possible situations .

Concise and easy to understand , It can also avoid missing , Quickly list all possible situations , Including nonexistent combinations , You can combine according to the advantages .

shortcoming

There is a risk of missing measurement in the merger .

Because I made a full combination , So the number of use cases is especially large when there are many inputs （ Condition stake ）, The portfolio grows exponentially .

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