Interface test mock practice (II) | complete batch manual mock in combination with JQ

Because the content of this chapter is to use jq Complete with tools , Therefore, I will spend some space on the introduction at the beginning jq Machine use , If the reader is already familiar with it jq, You can just skip this part .
Let's look at the application scenario first ,App There are often some list pages for information display , For example, the merchant's dishes 、 Stock companies 、 List display of articles, etc , Like the following ：
If the food is not enough ~ No , The number of dishes is small, not enough to test , If we want to test hundreds of dishes , Will it affect the performance when brushing , Whether the display is normal , Boundary value test shown in the list, etc ;
And to measure, there must be data display , At this time, it is a little troublesome to find or create so much data through the back end , In fact, the test point of our test is to test the display and performance of the front-end page , As long as this part of the data is available , It doesn't matter whether the data is actually obtained from the database .
This time you can use mock The means of , Generate equivalence classes for this kind of big data , So that the front end can get this kind of data , and Charles It is we who realize manual mock One of the sharp tools for testing ！
The customary , Look at the official website first jq The explanation of ：
jq Official website address ：https://stedolan.github.io/jq/
Lightweight and flexible Json Processing the command line .
purpose
Speaking of this, some people have a feeling that it can be used for something , Why handmade mock To use jq 了 ？ you 're right ！ It is used to handle the returned by the interface json Data to achieve mock The effect of .
- Mac：Mac It's as simple as ever ( sweet ~), installed Homebrew If so, an order brew install jq that will do
- Other systems ：jq Our official website is very considerate , The download methods of each system and the links of relevant download tools are given , Please check the official website for details , Links are as follows
- Basic filtration .
Simply put, it is output as is ：

- Object filtering .key、.key1.key2、.["key"]

- Index filtering .key[index]、.key[ startIndex: endIndex]
.key[index]
.key[ startIndex: endIndex]

- Object building {} 、[]
If one of the expressions has more than one result , Then the output will also produce multiple results
If key It doesn't exist ,value Will be assigned as null
If you put parentheses around the key, it means that it will be evaluated as an expression .

- Other common uses ：
Calculation
To obtain the length of the

- Array operations
jq For arrays, there can be Union (’+’) And subtraction (’-’) The operation of ：
Combine ('+')： There are arrays a,b; a+b You'll get one that contains all a,b New array of array elements ：
Difference set ('-')： There are arrays a,b; a-b You'll get one that contains only a Medium element , It doesn't contain b New array of elements in ：

- More usage
For more usage, please refer to the official website ：
https://stedolan.github.io/jq/manual/#Basicfilters
As shown in the following figure, the popular science recommendation column has 2 A popular science article , Now I want to mock Dozens or even hundreds of articles or advertisements .
- Grab the response of the interface json The message is as follows ：

- We store the data in json In file , And then assign it to a variable

- And then we use jq Yes pageList The list in += operation , Complete a double growth , Pass the result to the variable mockData.
According to the above method , Each time the number of elements in the list doubles , Operation n The next time it becomes 2 Of n Times the power , The speed of exponential growth needless to say ~
In this way, after getting the data according to their own needs, the new data will be stored in json file , The most important data preparation process is completed ：
Said so much “ crap ”, Finally, it's the protagonist , In fact, the data is ready , The use of tools is still very simple ,Charles There's one called Map Local The function of , When you want to mock Right click on your request to find ：
Map Local You can replace the specified interface return with a local file , For example, replace here with the data file generated in the above nonsense for half a day MockTest.json：
Then refresh the page again , Look at the effect , The list of pages doubles as desired , You don't have to add data to the database , Keep a journal of json Files can be tested and used immediately ：
above , Look forward to your communication , A lot of correct .
【 Related articles 】
- be based on Charles Interface test of agent technology Mock actual combat ( One )
- Interface test strategy and problem analysis model

Link to the original text