Feature files are written in a “behavior-driven” style
When everyone understands our user stories, we waste less time in the production process and have fewer instances where we redo the work we’ve done.
Feature: Update credit card
Description: As a customer care advocate, I want to update a customer’s credit card on file, so that the customer’s new credit card will be charged during the next billing cycle.
Scenario: Change credit card with a valid credit card
Given: I have a customer with an existing credit card.
When: I enter a new valid credit card number.
Then: The service request is processed successfully.
And: I can see that the customer’s new card is on file.
Scenario: Change credit card with an invalid credit card number
Given: I have a customer with an existing credit card.
When: I enter a new credit card number that is not valid.
Then: An error shows that the credit card number is not valid.The test runner parses the feature file, figures out which JavaScript functions to run and reports back.
document是最关键的