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Things a QA engineer must know about JSON

JSON : JavaScript Object Notation

JSON highly used in web services and rest applications. When a tester testing API he/she should have some knowledge to pass JSON objects and to understand received Jason response.  JSON is not a replacement of XML but it is very much useful in mobile applications. XML file size much larger than JSON and mobile applications prefer lightweight ways to communicate. In that case JSON is the most suitable one.



Why JSON

  • Easy for anyone to read and write.
  • Language independent
  • Some syntaxes are JavaScript objects. 
  • Can be used to store application data. 

JSON Values

  • String 
  • Numbers
  • True/false
  • Null
  • Objects
  • Arrays 

JSON Objects

It is a name values pair using a colon. 

Syntax
Sample

{
   name : value,
   name : value
}

{
   “name” : “Isuri”,
   “age” : 25
}

JSON Arrays

Values enclosed by brackets and separated by commas. 

Syntax
Sample

[value, value, value, value]

[1,2,3,4,5,6]


JSON file is a collection of values, objects and arrays






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