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API Testing with Karate

Karate Test

For a quickstart, use the Karate Maven archetype to create a skeleton project with one command.

mvn archetype:generate \
-DarchetypeGroupId=com.intuit.karate \
-DarchetypeArtifactId=karate-archetype \
-DarchetypeVersion=0.9.6 \
-DgroupId=<your_group_id> \
-DartifactId=<your_project_name>

Sample feature files :

Scenario:  Fetch User
    Given url 'https://reqres.in/''
    And path 'api/users/2'
    When method get
    Then status 200

But its best to define base URL in the Background section, like this :

Background:
    * url 'https://reqres.in/'

It is important to note that Karate exposes the status and response to be used for various purposes. Assertions can be added in this way :

  And match response.data.first_name == 'Janet'
  And match response.data.id == 2
  And match response.data.avatar == "#string"

For Data driven scenarios, one can use Scenario Outline instead of Scenario in this way :

Scenario Outline:  Successful Registration
    * def randomPwd = dataGenerator.getRandomPwd()
    * def payload =
    """
		 {
        "email": "<email>",
        "password": "<password>"
			}
    """ 
    Given path 'api/register'
    And request payload
    When method post
    Then status 200
    And match response.token == '#string'
    
    * def id = response.id
    * print 'Created ID is ',id
    * def token = response.token
    * print 'Created token is ',token
    
    Examples:
        | email                  | password     |
        | eve.holt@reqres.in     | #(randomPwd) |
        | tracey.ramos@reqres.in | #(randomPwd) |

For Parallel execution using Junit 5, the Runner class should be like this :

import com.intuit.karate.Results;
import com.intuit.karate.Runner;
import static org.junit.jupiter.api.Assertions.*;
import org.junit.jupiter.api.Test;

class TestParallel {

    @Test
    void testParallel() {
        Results results = Runner.parallel(getClass(),5);
        assertEquals(0, results.getFailCount(), results.getErrorMessages());
    }

}

To run the full test set :

mvn test

To run specific scenarios : Tag the scenarios with tag of your choice, like so :

@Smoke  
  Scenario:  Fetch User  
    Given path 'api/users/2'
    When method get
    Then status 200

Then run these scenarios using :

mvn test -Dkarate.options="--tags @Smoke"

To run scenarios other than the tagged ones :

mvn test -Dkarate.options="--tags ~@Smoke"

For more information on Karate please refer here.