Fundamentals of software testing

One ： Software development process model

Definition of software ：
IEEE The definition of : A computer program 、 Method 、 Rules and related documentation, as well as data necessary for running on the computer .
Accepted definition : Program 、 A complete collection of data supporting program operation and documentation related to the program .

software development ：
Practice has proved : It is effective to organize and manage software development according to engineering principles and methods , Is a major way to get rid of the software crisis .

It is from the definition of software requirements to the scrapping of software after delivery , System development throughout the life cycle 、 The whole process of operation and maintenance 、 The structural framework of activities and tasks .

Software life cycle model
It is from the definition of software requirements to the scrapping of software after delivery , System development throughout the life cycle 、 The whole process of operation and maintenance 、 The structural framework of activities and tasks .
There are mainly :
The linear sequential model is the waterfall model
Prototypes
Spiral model
Spiral model

Two ：

Definition of software testing ：
1983 year IEEE ( Institute of Electrical andElectronics Engineers) The definition of software testing in the standard terminology of software engineering proposed by the International Association of electronic and electrical engineers is : The process of running or measuring a system by manual or automatic means , Its purpose is to test whether it meets the specified requirements or to find out the difference between the expected result and the actual result .
We define software testing as the process of finding faults in a program , Make testing an achievable task , Thus overcoming the psychological problems . therefore , For software testers , The best definition of testing is : Software testing is the process of executing a program to find errors .

3、 ... and

Definition of software defect ：
From the inside of the product , Software defects are errors in the development or maintenance of software products 、 Problems and so on ;
Looking from the outside , A software defect is a failure or violation of a function that a system needs to implement .