I am trying to understand how to correctly create my BDD REST testing scenarios.
From what I have read online, we should have only one WHEN-THEN pair and the assertions should be done in the THEN step.
What if we had a situation such as
Given user searches for flight
And user picks seat
And user adds bags to flight
When user purchases flight
Then flight is successfully booked
What happens if we get a 500 Status error when we try to add the bag to flight. Should we at the very least do basic assertions in all steps?
You can add assertion at all steps.
From what I have read online, we should have only one WHEN-THEN pair and the assertions should be done in the THEN step
The main assertion of scenario can be done at Then step. Below example is from my current project and you can see how I am writing steps,
@TC_CUE_Search_for_all_templates_and_validate_particular_template_response
Scenario: Validate json details for given template
Given Get template key and Application key from db
And Load Datasheet for Iteration
And Execute the request to fetch all the templates of an application
Then Get and verify the response of given template from template result list
Given Get template key and Application key from db
I validate whether DB is returning valid response or not. If I receive valid response then I fetch the required details from DB and write it in excel.
And Load Datasheet for Iteration
Reads the excel sheet.
And Execute the request to fetch all the templates of an application
GET request will be executed and I validate the response code and store the result.
Then Get and verify the response of given template from template result list
Here I do the main validation. In earlier step, it returns huge response and I fetch the particular response based on the parameter and verify all the required fields.
Purpose of this example is to clarify how you can automate REST scenarios.