[advanced software testing step 1] basic knowledge of automated testing

Catalog

One 、 The concept of automated testing

1. Automated test execution technology

2. Automatic test design technology

Two 、 Advantages and disadvantages of automated testing

1. The advantages of automated testing

2. The disadvantages of automated testing

3、 ... and 、 Model based testing （MBT）

1. Model based testing technology

2. The main advantages of model-based testing technology

3. Disadvantages of model-based testing technology

4. Common tools based on Model Testing Technology

Four 、 Selection of test tools

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One 、 The concept of automated testing

2010 It began to mature automation centered on test design around the year , There are two main concepts ： Automatic test execution technology and automatic test design technology .

1. Automated test execution technology

It refers to the execution of test cases or scripts , Automatically operate the tested object and peripheral equipment in the test environment to complete the test steps and result inspection , The related technology of automatically judging the execution results of test cases .

2. Automatic test design technology

Means by some information （ Such as the model of the system , The design model , Source code, etc ） Generate test cases and / Or test script related technology .

Two 、 Advantages and disadvantages of automated testing

1. The advantages of automated testing

• Improve test quality
• Improve test efficiency , Reduce testing time
• Improve test coverage
• Perform test tasks that are not easy to complete by manual testing
• The ability to better value software defects
• Better use of resources
• Enhance the partnership between testers and developers
• It takes longer to perform test steps , More comprehensive test cases
• Faster feedback on software quality
• Improve the stability and reliability of the system

2. The disadvantages of automated testing

• Generate development costs
• Need to test the technical team
• Script maintenance costs are high
• Non creative
• Introduce more complexity
• It is easy to deviate from the original test goal
• Additional errors may be introduced

3、 ... and 、 Model based testing （MBT）

It belongs to one of the current directions of automated test design , Another direction is search based testing technology .

1. Model based testing technology

Model based testing technology describes the requirements and expected behavior of software through models , Automatically generate test cases and scripts . Model-based testing technology builds the model of the system , Use the model to describe the requirements of the system 、 Behavior 、 Data and other aspects of information , Automatically generate test cases and test scripts from the model through computer algorithms . Then execute the generated tests through a mature automated test execution system . So as to further improve the efficiency of automated testing . It divides the process of test case design originally implemented manually into two parts: test modeling and test generation . Test modeling still needs to be implemented manually , The test generation is automatically completed by the generation algorithm .

2. The main advantages of model-based testing technology

• The automation of test design can improve work efficiency and reduce human errors
• Establishing a test model early can improve communication , Find defects in requirements in advance
• It enables business analysts who do not understand test design technology to implement test design
• Improve test coverage , So as to improve the quality of software products
• Shorten the cycle of test design , Accelerate testing activities

3. Disadvantages of model-based testing technology

• There may be too many test cases generated from the model （ Test case explosion ）. Therefore, test generation should be carefully controlled and appropriate algorithms should be selected to avoid
• Modeling requires some input
• The model may also describe errors . Models are built by people , Therefore, it may contain errors . The resulting test cases will also contain errors
• The abstraction of the model may cause difficulties in understanding . All models have a certain degree of abstraction , When there is no consensus on abstract logical principles , It may cause the reviewer to fail to understand the test model

4. Common tools based on Model Testing Technology

Microsoft Spec Explorer
GraphWalker
Stoat
MBT On Cloud

Four 、 Selection of test tools

There are many commonly used automated testing tools in the market , Common are UFT（ Alias abbreviation ：QTP）、Robot Framework、Selenium、Appium

Learning resource sharing

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