# BDD

## 📚 BDD

BDD stands for <mark style="background-color:green;">**Behavior Driven Development.**</mark>

### 💬 Gherkin Language

* Tests are written in simple English-like language called Gherkin.
* Uses keywords like Given, When, Then to structure test scenarios.
* Creates living documentation of system behavior.

### 🥒 Cucumber Framework

* Cucumber implements BDD principles.
* Tests written in Gherkin are executed by Cucumber.
* Step definitions map Gherkin steps to code.

### 👍 Benefits

* ✅ Improved collaboration between teams
* 📖 Documentation integrated with tests
* ⚙️ Ties code to business behavior

### 🥒 BDD Example for CNBC

```gherkin
//CNBC Login Feature
Feature: CNBC Login

  Scenario: Valid Login
    Given I am on the CNBC login page
    When I enter username as "john123"
    And I enter password as "pass123"
    And I click on login button
    Then I should see homepage

```

```java
//Step Definitions  

@Given("I am on the CNBC login page")
public void launchLoginPage(){
  //Code to launch login page
}

@When("I enter username as {string}")
public void enterUsername(String username){
  //Code to enter username 
}

//Other steps defined similarly
```