What is a test case? How to design?

It is often mentioned in learning or actual testing work “ The test case ” The word , you 're right , Test case is the core of test work , No matter what kind of test to do , Before you actually do the test , We all need to design test cases according to software requirements , Then according to the designed test cases , Start testing . So here comes the question , What is a test case ? What's the use of it ? Now let's enter the study of test cases !

1、 Recognize test cases

Before software testing ?, Testers tend to design test cases first , Test item by item according to the compiled test cases . Why do you do this ? such as , Test the login function of the website page , If you get the function without thinking, go to a little bit , How many test methods can you think of ?

Even a very simple little function test , Find and list the test points in advance , Not to mention a huge system with complex functions . If there are no test cases , It is difficult to describe the possible situation clearly , Ensure the quality of the software .

So far , You may already know what test case design is . It is a set of test inputs designed for a specific purpose 、 Execution conditions and expected results , So as to verify whether the test meets the requirements , It is an important basis for guiding the testing work .

In layman's terms , The process of analyzing the test points of a function and listing different test cases is the process of designing test cases , And each listed situation is a test case . When the design is completed, it can be executed according to these test cases , In this way, it is not easy to miss measurement 、 Wrong measurement .

2、 Design test cases

Before designing test cases , We need to understand the basic elements of software test cases , That is, the basic content that a complete test case must contain . Only the content is sufficient to guide the tester to conduct the test , Otherwise, the written test cases will not be tested , That is, the failed test case .

Test cases are the most basic 8 Elements , Test case numbers 、 Function module name 、 Test case title 、 Importance level 、 precondition 、 input data 、 Operation steps and expected results . Of course , Different companies may have different test cases , In practice, we can supplement according to the situation , For example, add testers 、 Test time 、 Notes and other information .

In order to ensure the coverage of test cases , There is also a corresponding process for writing test cases in enterprises . The first is demand analysis , Then extract the test points , Then there is test case design , Finally, the test case review .

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