It looks like you're inquiring about using Cucumber for testing, particularly about the "When" step, which is a part of the Behavior-Driven Development (BDD) format.
In Cucumber, the typical structure of a feature file looks like this:
```gherkin
Feature: Title of the feature
In order to achieve something
As a role
I want some feature
Scenario: Title of the scenario
Given some precondition
When some action is performed


