Data-driven test design

 Why Not Write All 10 Fields in One Step?

When user fills form with "Hari", "Taraka", "samplemail@gmail.com", "2985725983", "Hyderabad", "Male", "01/01/1990", "Engineer", "Single", "Yes"

Problems:

• Hard to read
• Hard to maintain
• No clarity on which value belongs to which field
• Error-prone if field order changes
• 
  

=======================================================

#Data Driven:

@facebooklogin

Scenario: Facebook login page

Given user signing into facebook login page

When user login into facebook application

| Hari                                 |

| Taraka                             |

| samplemail@gmail.com |

| 2985725983         |

Then facebook homepage is displayed

If you run this you will get error, because we are not defined in StepDefiniation file

FAILED: io.cucumber.testng.AbstractTestNGCucumberTests.runScenario("Facebook login page", "Application Login")

Runs Cucumber Scenarios

io.cucumber.testng.UndefinedStepException: The step 'user signing into facebook login page' and 2 other step(s) are undefined.

You can implement these steps using the snippet(s) below:

@When("user login into facebook application")

public void user_login_into_facebook_application(io.cucumber.datatable.DataTable dataTable) {

// Write code here that turns the phrase above into concrete actions

// For automatic transformation, change DataTable to one of

// E, List<E>, List<List<E>>, List<Map<K,V>>, Map<K,V> or

// Map<K, List<V>>. E,K,V must be a String, Integer, Float,

// Double, Byte, Short, Long, BigInteger or BigDecimal.

//

// For other transformations you can register a DataTableType.

throw new io.cucumber.java.PendingException();

}

1. Convert to Map<K, V>

Best for key-value pairs (used for form-like data):

Map<String, String> data = dataTable.asMap();

System.out.println("First Name: " + data.get("FirstName"));

2. Convert to List<Map<String, String>>
Best when you have multiple sets of key-value data (like multiple users):

When user logs into facebook with multiple accounts
| FirstName     | LastName     | Email                               |
| Hari                | Taraka           | hari@gmail.com           |
| John               | Doe               | john.doe@gmail.com  |


List<Map<String, String>> rows = dataTable.asMaps();
for (Map<String, String> row : rows) {
    System.out.println("Email: " + row.get("Email"));
}
 3. Convert to List<List<String>>
Use when no headers:
When user enters following fields
  | Hari   | Taraka   | hari@gmail.com |

List<List<String>> data = dataTable.asLists();
System.out.println(data.get(0).get(0)); // Hari

================================COMPLETE CODE=========================================

Feature file:

Feature: Application Login

#Data Driven:

@facebooklogin

Scenario: Facebook login page

Given user signing into facebook login page

When user login into facebook application

| Hari |

| Taraka |

| samplemail@gmail.com |

| 2985725983 |

Then facebook homepage is displayed

StepDefiniation file:

@Given("user signing into facebook login page")

public void user_signing_into_facebook_login_page() {

// Write code here that turns the phrase above into concrete actions

System.out.println("User logging in facebook page");

}

@When("user login into facebook application")

public void user_login_into_facebook_application(List<String> data) {

System.out.println(data.get(0));

System.out.println(data.get(1));

System.out.println(data.get(2));

System.out.println(data.get(3));

}

//Note: It takes a list of strings (data) and prints out user details such as the name and email address.

@Then("facebook homepage is displayed")

public void facebook_homepage_is_displayed() {

System.out.println("facebook homepage is displayed");

System.out.println("=================================================");

}

TestNGRunner file:

package cucumberOptions;

import io.cucumber.testng.AbstractTestNGCucumberTests;

import io.cucumber.testng.CucumberOptions;

@CucumberOptions(features="src/test/java/features", glue ="stepDefinitions", tags= "@facebooklogin", monochrome=true)

public class TestNGRunner extends AbstractTestNGCucumberTests {

}

Output:

User logging in facebook page

Hari

Taraka

samplemail@gmail.com

2985725983

facebook homepage is displayed