Gherkin is a plain-text language used to write tests for Cucumber. It is designed to be easy to read and understand and can be written in any language. Gherkin test files are typically named with a ".feature" extension.
A Gherkin test consists of a series of "steps" each of which has a "keyword" and an associated "argument". Keywords are used to describe the action that should be taken in each step and arguments are used to provide more details about the step (e.g. the name of the object that should be clicked on or the text that should be entered into a field).
Here is an example of a simple Gherkin test:
Feature: Search for articles on the Wikipedia homepage
Scenario: Search for an article about cats
Given I am on the Wikipedia homepage
When I search for "cats"