How many tips do you know about using mock technology to help improve test efficiency?

Mock What is it? ？

Let me describe these scenes for you , See if you are familiar ？

Test a business module , Several interfaces in this business module are connected to the third party , Because the third party delayed delivery , Lead to project delay , I'm carrying the pot again  

I want to test whether the front-end page fonts are compatible , Need to change the database of related fields , But I have no permission to modify the database , I'm so worried

The leader asked me to test the software deployed on a certain machine , But ... The machines are not deployed , There is no way to test  

The module I tested is seriously coupled with other modules , Other modules have not been developed yet , I can only wait , The final test was delayed … Performance hit again C 了  

These are in our usual testing process , Often encountered problems blocking the progress of testing , What are the technical means , Can solve these problems , Improve our testing efficiency ？

Don't worry about knowing the answer , You can take a look at the above four processes , In fact, it is our tested module that is moving to a certain dependent environment （ Third party service 、 Back end interface 、 Hardware device 、 Other services ） In the process of sending the request , There is a problem with the dependent environment , This will affect our testing efficiency .

So if we put this “ dragging ” Directly replace the dependent environment of , Change to our own service interface , We can return whatever we want it to return , Test it , Is it much easier ？

The scene above , Actually used , That's what we're going to teach you next Mock technology .

How to use Mock technology ？

Mock There are many ways to achieve this , Can pass mitmproxy+python Realize deep customization Mock, It can also be done through fiddler or Charles This relatively simple tool implements some basic Mock.

First , Let's first see how to pass Charles Realization Mock. Before implementation , Just a quick introduction Charles This tool .Charles Itself is a very powerful agent tool , Charles The main functions include ：

• Support SSL agent . Can grab analysis https Request .

• Support flow control . Can simulate slow network and waiting time （latency） Longer request .

• Support retransmission of network requests , Convenient for backend debugging .

• Support modifying network request parameters .

• Support network request interception and dynamic modification .

• Can automatically put json or xml Formatting Data , Convenient view .

Yes, of course , The focus of this article is on Mock technology , Then let's take a look ,Charles How to achieve Mock . .

adopt Mock The effect of technology modifying Baidu page

1. Save the data returned by the interface first , Right click an interface -> Click on SaveResponse -> Write the file suffix .html

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2. To the local html Make changes , take “ use Baidu Search ” Change it to “ Hogwarts ”

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3. Set up Charles Conduct map local, Right click on the Map Local-> Get into Edit Mapping -> Click on choose -> Select the modified html-> Click on OK

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4. At this time, ask Baidu again , You can see “ use Baidu Search ” Change into “ Hogwarts ”

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adopt Mock Technology modifies the display effect of stocks

The above case is Mock An application scenario with relatively simple technology , that Mock Whether technology can be used in App The same effect is achieved in application ？ For example, below , We are going to test whether the list display color of the snowball stock interface will change with the rise and fall limit of the stock price .

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Maybe here , Many students said , You can change the database , But there may be two problems in changing the database ：

1、 Not all tests have the right to modify the database .

2、 Some data information is obtained directly from the third-party interface , The test cannot have the permission to change the third-party service database .

In fact, it is very simple to realize the above test requirements , Just make good use of Mock Tools , understand Mock Implementation and configuration principle of , You can easily complete the list display of the snowball stock interface, and whether the color will change with the rise and fall limit of the stock price , So as to improve the test efficiency .

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summary

Of course , The above small exercises are only realized Mock A simple application scenario in technology , As for how to solve the dependence of third-party services and other more Mock Use scenarios of Technology , And more advanced how to combine Mock Technology realizes a data factory , You can come to our 《3 Training camp for automated test of sky interface 》 Try to understand ~