Ok, the value you looking for is not in the response body, but it is in the response headers.
Here is how you can extract it:
- that can be achieved using a separate step like groovy as you mentioned
- also can be achieved without using additional step, by using script assertion, personally prefer this as one step less.
Script Assertion for first REST request step:
/**the below script extracts PlanID http response header value
* and set it a test case level property called
* PLANID_VALUE_FROM_PREVIOUS_RESPONSE, of course, you may free to choose
* any name. Before that it asserts that there is a header exists in
* response called PlanID and not null
**/
def key = 'PlanID'
assert messageExchange.responseHeaders.containsKey(key)==true, "${key} HTTP Header does not present in the response headers"
assert null != messageExchange.responseHeaders[key][0], "Header ${key} does not have any value or null"
context.testCase.setPropertyValue('PLANID_VALUE_FROM_PREVIOUS_RESPONSE', (messageExchange.responseHeaders[key][0]).toString())
In the next rest request step, you might have a query parameter for PlanID where you define value as ${#TestCase#PLANID_VALUE_FROM_PREVIOUS_RESPONSE}. For more details on this can be found in the documentation, you should be able to define something like either query '1.3. Query Parameters', but value should be property expansion like above.
It may look something like:
EndPoint: yourhostandport
Resource/Method [POST] updatePlan [updatePlan?PlanId=${#TestCase#PLANID_VALUE_FROM_PREVIOUS_RESPONSE}]
