Definition of software testing

One 、 Definition of software defect

1. The software does not realize the functions required by the product specification

2. The software has the functions specified in the product manual that should not appear

3. The software realizes the functions not mentioned in the product specification

4. The software does not achieve the goal that the product specification does not explicitly mention but should achieve .

5. Software is hard to understand 、 Not easy to use 、 Run slowly or ( From a testing point of view ) End users will think it's bad

All in all ： All that do not meet or exceed the requirements are defects

There is no software without defects , Only defects that have not been found so far .

Two 、 Definition of software testing

1. Positive thinking

starting point ： I am convinced that the product can work normally , Evaluate the characteristics or capabilities of a program and system , And determine whether it achieves the desired results , Software testing is any behavior for the purpose of one time .

2. Reverse thinking

starting point ： Side 4 is the process of executing a program or system in order to find errors

The test is to prove that the program is wrong , Not to prove that the program is wrong

A good test case is that it can find errors that have not been found before

A successful test is a test to find errors that have not been found before

3. Generalized software testing definition

Software testing is to test all work products in the process of software formation （ Including procedures and related documents ） Test carried out , Not just testing the operation of the program .

3.1 confirm （Validation）

Verify whether the function or application for a specific purpose has been realized by checking and providing objective evidence .

3.2 verification

Verify whether the specified requirements are met by checking and providing objective evidence .

Four 、 The purpose of software testing

1. With the least amount of manpower 、 Material resources and time to find out all kinds of potential errors and defects in the software , Ensure that all errors and defects are repaired , Avoid the commercial risks caused by hidden dangers caused by potential software errors and defects after software release .

2. At the same time, the test results and test information obtained in the test process are used , As an important input for subsequent project development and test process improvement , Avoid repeating the same mistakes in future project development and testing .

3. Adopt more efficient test management means , Improve the efficiency of software testing and the quality of software products .

5、 ... and 、 The difference between testing and debugging

	test	debugging
The main body	Testers	Development
The goal is	look for bug	Correct the error
Method	Equivalence class 、 The boundary value ......	Program and logic method
Ideas	Reverse thinking	Positive thinking

• In the subject 、 The goal is 、 Different methods and ideas
• The test starts with known conditions , Use a predefined process , And have predictable results ; Debugging starts with unknown conditions , The ending process may be unpredictable .
• Testing can be planned , Test cases and processes can be developed in advance , Work progress can be measured ; It is relatively difficult to describe the process or duration of debugging .
• The test objects include the documents in the software development process 、 Data and code , The object of debugging is generally just code