[WS] Validate JSON string against a schema

Requirements

• Katalon Studio version 8.4.0 onwards.

Description

Validate a JSON response body, request body, or string against a JSON schema. The JSON schema input can be a JSON string, URL, or file path.

Keyword name: WS.validateJsonAgainstSchema

Parameters

Validate a JSON Object against a JSON Schema

Parameter	Parameter Type	Mandatory	Description
jsonObject	String	Required	Specify the JSON object that needs to be validated
jsonSchema	String	Required	Specify the JSON schema used to validate the JSON object.
flowControl	FailureHandling	Optional	Specify failure handling schema to determine whether the execution should be allowed to continue or stop.

Validate the Response against a JSON Schema

Parameter	Parameter Type	Mandatory	Description
response	ResponseObject	Required	Specify the response object that needs to be validated
jsonSchema	String	Required	Specify the JSON schema used to validate the response object.
flowControl	FailureHandling	Optional	Specify failure handling schema to determine whether the execution should be allowed to continue or stop.

Returns

Parameter Type	Description
boolean	true: the response passes the validation. false: the response doesn't pass the validation.

Note:

• If Katalon Studio cannot find the schema file or the response doesn't pass the validation, throw: StepFailedException.

Example

Validate a JSON Object against a schema

import com.kms.katalon.core.webservice.keyword.WSBuiltInKeywords as WS

String jsonPass =
"""
{
  "\$id": "https://example.com/person.schema.json",
  "\$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "Person",
  "type": "object",
  "properties": {
    "firstName": {
      "type": "string",
      "description": "The person's first name."
    },
    "lastName": {
      "type": "string",
      "description": "The person's last name."
    },
    "age": {
      "description": "Age in years which must be equal to or greater than zero.",
      "type": "integer",
      "minimum": 0
    }
  }
}
"""

String jsonObject = 
"""
{
  "firstName": "White",
  "lastName": "Walter",
  "age": 52
}

"""

boolean successful = WS.validateJsonAgainstSchema(jsonObject,jsonPass)

Validate a Response against a schema

import com.kms.katalon.core.testobject.ResponseObject
import com.kms.katalon.core.webservice.keyword.WSBuiltInKeywords as WS
import com.kms.katalon.core.webservice.verification.WSResponseManager

ResponseObject response = WSResponseManager.getInstance().getCurrentResponse()

String jsonPass =
"""
{
  "\$id": "https://example.com/person.schema.json",
  "\$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "Person",
  "type": "object",
  "properties": {
    "firstName": {
      "type": "string",
      "description": "The person's first name."
    },
    "lastName": {
      "type": "string",
      "description": "The person's last name."
    },
    "age": {
      "description": "Age in years which must be equal to or greater than zero.",
      "type": "integer",
      "minimum": 0
    }
  }
}
"""

boolean successful = WS.validateJsonAgainstSchema(response,jsonPass)