Explanation of Cucumber Framework Setup & TestNGRunner without stepDefinition

 We are setting up a Cucumber-TestNG automation framework using Maven. This involves creating feature files, step definitions, and a TestNG Runner class to execute our tests.

1.Folder Structure

• create feature file : /AutomationCucumber/src/test/java/Features/firstProgram.feature
• create TestNG Runner File : /AutomationCucumber/src/test/java/cucumberOptions/TestNGRunner.java
• create stepDefiniations file : /AutomationCucumber/src/test/java/stepDefinitions

2. Creating the Feature File

📌 Path: /AutomationCucumber/src/test/java/Features/firstProgram.feature

A feature file contains test scenarios written in Gherkin language (Given-When-Then syntax).

Feature: Application Login

Scenario: Admin Page default Login
Given user is on NetBanking Landing Page
When user login into application
Then homepage is displayed
And cards are displayed

3. Creating the TestNG Runner File
📌 Path: /AutomationCucumber/src/test/java/cucumberOptions/TestNGRunner.java
The TestNG Runner file integrates Cucumber with TestNG.

package cucumberOptions;

import io.cucumber.testng.AbstractTestNGCucumberTests;
import io.cucumber.testng.CucumberOptions;

@CucumberOptions(features="src/test/java/features", glue ="stepDefinitions", monochrome=true)
public class TestNGRunner extends AbstractTestNGCucumberTests {

}

Explanation:
@CucumberOptions:
features = "src/test/java/Features" → Specifies the location of feature files.
glue = "stepDefinitions" → Specifies the package where step definitions are implemented.
monochrome = true → Makes console output readable by removing ANSI colors.
extends AbstractTestNGCucumberTests:
Enables running Cucumber Scenarios using TestNG.

4. Execute TestNGRunner without stepDefinition



If you run above TestNGRunner.java file you will get below error

FAILED: io.cucumber.testng.AbstractTestNGCucumberTests.runScenario("Admin Page default Login", "Application Login")
        Runs Cucumber Scenarios
io.cucumber.testng.UndefinedStepException: The step 'user is on NetBanking Landing Page' and 3 other step(s) are undefined.
You can implement these steps using the snippet(s) below:

What this means:
You have defined a scenario in your .feature file:

Given user is on NetBanking Landing Page
When user enters username and password
Then home page is displayed

But Cucumber could not find Java methods that match these steps in your stepDefinitions package.

package stepDefinitions;
import io.cucumber.java.en.Given;
import io.cucumber.java.en.Then;
import io.cucumber.java.en.When;
public class MainSteps {
	@Given("user is on NetBanking Landing Page")
	public void user_is_on_net_banking_landing_page() {
	    // Write code here that turns the phrase above into concrete actions
		    System.out.println("User landed on netbanking page");
	}
	@When("user login into application")
	public void user_login_into_application() {
	    // Write code here that turns the phrase above into concrete actions
		System.out.println("User login into the application");
	}
	@Then("homepage is displayed")
	public void homepage_is_displayed() {
	    // Write code here that turns the phrase above into concrete actions
		System.out.println("Home page is displayed");
	}
	@Then("cards are displayed")
	public void cards_are_displayed() {
	    // Write code here that turns the phrase above into concrete actions
		System.out.println("Cards are displayed");
	}
}


Again run the TestNGRunner.java file 

User landed on netbanking page
User login into the application
Home page is displayed
Cards are displayed
PASSED: io.cucumber.testng.AbstractTestNGCucumberTests.runScenario("Admin Page default Login", "Application Login")
        Runs Cucumber Scenarios

===============================================
    Default test
    Tests run: 1, Failures: 0, Skips: 0
===============================================