Software testing (III) p51-p104 software test case methods and defects

Boundary value analysis

The boundary value is just a specific data . For example, the text box needs to enter 6-18 Characters , The boundary value has ：6 Characters ;18 Characters
Sub boundary ： Value near boundary ; According to the unit specified in the system , Differ by one data value .
1）6<=x<=12 test ： Inside 12 Outside 13
2）6<x<12 test ： Inside 11 Outside 12

• Selection principle of boundary value
• 

Practical cases （ triangle ）

Cause and effect diagram

Example of cause and effect diagram method

Case study ： A vending machine
reason ： Coin-operated （5 horn , One yuan ）、 Choose a drink （ Orange Juice , beer ）
result ： Make orange juice 、 Make beer 、 Change fifty cents
5 horn + Choose orange juice ------ Make orange juice
5 horn + Choose a beer ------ Make beer
limitations ： There are many reasons and results , More connections , Cause and effect readability becomes poor , Therefore, it is suitable for local small function analysis
The test case ：

Decision table method

It is suitable for multi conditional content combination and result analysis
Conditions of use ： The position and order of all conditional piles in the table do not affect each other , The sequence of all action piles will not be different due to the change of condition sequence .
step
1、 Identify the condition , And the corresponding action （ result ）.
2、 Number of combinations of analysis conditions ：n Conditions , There are two cases for each condition , be 2 Of n Power result .
3、 Simplify the optimization results , Eliminate some impossible situations

example

1、 Analyze conditions and actions

2、 Write conditional stake 、 Action post

3、 Optimize
Regardless of the amount , As long as it is not expired, the approval and bill of lading will be sent （ You can choose one of two tests ） After optimization, the condition item is reduced to 3 individual .

4、 Take each column in the decision table as the operation and expected result

The judgment table is suitable for use conditions ：

Design method of test case , Not used alone ：
1、 All the software , It's all because of some kind of operation that leads to certain results .– Cause and effect diagram
2、 All software has text boxes – Consider using equivalence classes 、 The boundary value .

Merge 1234 For a project , Rest if you are tired
Merge 78, Not tired , Not interested, just the next chapter

Scene method

Basic flow ： The process of correctly realizing the basic functions of the software
Alternative streams ： Beyond the basic functions

testing procedure

Orthogonal experiment

Case study

Function diagram method

Applicable occasions ： The software status will be based on some content 、 The operation changes .

With QQ Log in as a case ：
1） Identify what can be done ：
IP1 Enter account
IP2 Input password ‘
IP3 Click login
IP4 Click the close button
2） Definition QQ The login interface is idle
3） Add operation to idle state （ The first round of analysis ）

Created a new state , The second round of analysis for the new state .
4） List the state change process

Other use case design methods

Comprehensive selection of use case design methods

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defects

• Definition of defect
  

• Attributes of defects
  

• The type of defect
  Demand analysis 、 design phase , There are many defects in document types ; Integration testing phase , There are many interface class defects ; System test phase , function 、 There are many interface defects ; Acceptance test phase , Focus on performance defects ; Implementation process , You may encounter software package defects

• Severity of defect
  

• Defect repair priority
  
  What is the relationship between defect severity and priority ？
  Not directly related , Don't think of serious defects , The priority is higher
  Can you exaggerate or reduce the severity of defects when submitting defects ？
  You can't

• The state of the defect
  

• Origin of defects
  

• The source of the defect
  
  

• The life cycle of defects
  

Identification of defects

• Defect report