Validate a JSON response

Validating a response in JSON format is almost identical to the standard procedure. For more information about validating a HTTP request, see Global validation.

You may define validations on the JSON response using JSONPath. To recap, JSONPath is a syntax that points to a portion of a JSON document.

For a JSON request, response validators may be created:

• For the entire response: These are standard validators that validate the response content.
• For a particular JSON node: These are validators that are specific to the JSON modules. A JSON node can then be specified by selecting it in the dialog box that is displayed by clicking on the magnifying glass next to the field.

  This will create a JSONPath expression based on the selected JSON node. You may edit the expression manually, but you must make sure the JSONPath expression remains valid. The JSONPath expression may be variabilized.

  You will then return to the normal procedure, except that instead of carrying out the validation on the entire server response, it will be done only on the part specified by the JSONPath expression.

• To create a response validator using JSONPath

1. Create a validator.
2. Select the On a particular node by option and select JSONPath in the list box.
3. Click on the magnifying glass next to the text field below and select the JSON node to be validated.
4. Click OK.

   The JSONPath expression for the selected node is displayed in the text field.

5. Select the text to be validated by clicking on the magnifying glass next to the text field below.

• Warning: Response validations on JSON nodes are resource-consuming operations. Only use this type of validation if absolutely necessary.