Correlation

Correlation allows you to link steps together. For instance, you can design a test scenario to evaluate your authentication process by taking the following steps: First, obtain the authentication token from the response of a login request. Then, insert the extracted token into subsequent requests. This short example demonstrates how correlation works in practice.

Capture Value from the Response​

1. Click the More button located to the right of the step and open the "Step Details" section.

2. To capture a value from the response of a step, go to the "Capture" tab in the "Step Detail" section and follow these steps:

   • Give a unique name to a variable that you will use to access the captured value in subsequent requests.
   • Select whether to extract the value from the response body or response headers.
   • Choose the appropriate extraction type based on where you extract the value.
   • If you're extracting from the response body, you can use JSON path, XML path, or regular expressions to extract the value.
   • If you're extracting from response headers, you can extract the entire header value or a part of the header value by using regular expressions.

Use Captured Value in Requests​

You can use the format {{captured_variable_name}} to insert a value that was previously captured into various parts of subsequent requests. This includes the URL, the request body, query parameters, headers, and authentication information.