Past and present lives of QR code and sorting out six test points

1 The past and present of QR code

The predecessor of two-dimensional code is one-dimensional code , It's the bar code behind the commodity packaging bag . Last century 70 It began to spread in the 1970s , But one-dimensional bar codes can only be recognized horizontally , The storage capacity of information is limited . therefore 80 s , Countries have successively developed QR codes with greater information storage .

QR code originated in the United States and Japan , Now it is very popular in China , The most commonly used is the payment QR code 、 Business card QR code 、 Trip code 、 Green code … With the rapid development of mobile Internet in recent years , QR code has already become an indispensable part of our life …

2 Two dimensional code principle

At present, the most used in the market is QR code (Quick Response Rapid response ), It is a kind of QR code ,QR Code can store more information than ordinary barcode , It doesn't need to align the scanner with a straight line when scanning like a normal barcode .QR The size is square , Only black and white . stay 4 One of the corners 3 individual , Printed smaller , image “ return ” The square pattern of a word . this 3 One is a pattern that helps decode software positioning , The user does not need to aim , Scan at any angle , Data can still be read correctly .

QR code itself is a URL, Only by QR In the form of code URL And user identity information into binary 0 and 1, The black pigment block in the QR code represents 1, The white pigment block represents 0, We scan the code , Get the information in the QR code .

3 QR code generation

Students can try to generate a QR code by themselves , Generate with forage QR code , The address is as follows

https://cli.im/

4 How to test QR code ？

Understand the history of QR code 、 After the principle , We need to know how to test QR code ？

Let's start with the six tests ： A functional test 、 Interface tests 、 Ease of use test 、 Compatibility test 、 Performance testing 、 Security testing

01 A functional test

（1） Whether the scan is successful and whether the correct response is made
（2） Whether there is a prompt when the scan fails
（3） Whether the code scanning entry page is displayed correctly , Whether the jump link is correct
（4） Save scan image , Whether it supports long press image recognition to enter
（5） When scanning only part , Whether the scan was successful
（6） Scan fuzzy QR code , Whether the scan is successful
（7） Scan failure / Expired QR code , Whether the scan is successful
（8） Scan the altered QR code , Whether the scan is successful
（9） A little distance / Long distance scanning QR code , Can I scan
（10） dark / normal / Highlight the environment , Whether the QR code can be scanned successfully
（11） Modify the content related to QR code / After jumping to the website , Do not regenerate QR code , Scan the code to see if the information is updated
（12） Code scanning jump process interrupt test （ Call when scanning code / Incoming information / Mail, etc. ）
（13） Scan multiple QR codes at the same time , Whether the scan is successful
（14） Scan the same code multiple times , Whether the scan is successful
（15） Scan the same QR code multiple times , Whether the content after jump is the same
（16） After scanning , Front and rear station switching , Whether the contents before and after switching are consistent
（17） During the scan , Can I cancel exiting the scan
（18） Whether the scan is successful in the case of weak network

02 Interface tests

（19） QR code interface design meets the requirements , Beautiful atmosphere

（20）3 The positioning black boxes are on the upper left 、 The upper right and lower left display

03 Ease of use test

（21） Scan QR code pictures with your mobile phone , Easy to operate , Scan to get the required information

（22） Long press the picture , Identify the QR code picture of the mobile phone , Scan successful

（23） Scan when QR code image is tilted or reversed , Can be scanned successfully

（24） In a dark environment , Automatically adjust the screen brightness when scanning code

04 Compatibility test

（25） Different phone models 、 System compatibility test

（26） QR code pictures of different materials , Scanning test

05 Performance testing

（27） Response time of user scanning operation

（28） Multiple users scan the same QR code at the same time , system performance

06 Security testing

（29） QR code information disclosure

（30） QR code information tampering

（31） QR code carries virus

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