Introduction to Artillery

Artillery is a modern, powerful, and easy-to-use load testing toolkit. It is often used to assess the performance and scalability of backend services, applications, and APIs. With Artillery, developers can ensure their applications can handle a high number of users or requests.

Getting Started with Artillery

  
    # To install Artillery globally, use the following command:
    npm install -g artillery

    # Creating your first Artillery test script:
    artillery quick --count 10 -n 20 https://your-api-endpoint.com
  

Artillery Configuration Basics

An Artillery test script is defined in a YAML or JSON file. Below is an example YAML file setup for a simple HTTP test:

  
    config:
      target: 'https://your-api-endpoint.com'
      phases:
        - duration: 60
          arrivalRate: 10
    scenarios:
      - flow:
        - get:
            url: "/"
  

Advanced Artillery Scenarios and API Explanations

Artillery supports more comprehensive scenarios with multiple requests and custom data. Below are several examples:

Sending POST Requests

  
    scenarios:
      - flow:
        - post:
            url: "/create"
            json:
              name: "John Doe"
              age: 30
  

Working with Variables

  
    variables:
      users:
        - userName: "user1"
          password: "password1"
        - userName: "user2"
          password: "password2"

    scenarios:
      - flow:
        - post:
            url: "/login"
            json:
              userName: "{{ userName }}"
              password: "{{ password }}"
  

Custom Headers and Cookies

  
    scenarios:
      - flow:
        - get:
            url: "/profile"
            headers:
              Authorization: "Bearer your_token"
            cookies:
              session_id: "abc123"
  

Creating a Load Testing App with Artillery

In this example, we will create a simple app that tests the performance of an online store API:

Step 1: Define Configuration

  
    config:
      target: 'https://api.online-store.com'
      phases:
        - duration: 300
          arrivalRate: 50
  

Step 2: Set Up Scenarios

  
    scenarios:
      - flow:
        - get:
            url: "/products"
        - get:
            url: "/products/{{ productId }}"
            capture:
              - json: "$.id"
                as: "productId"
        - post:
            url: "/cart"
            json:
              productId: "{{ productId }}"
              quantity: 1
        - get:
            url: "/cart"
  

Conclusion

Artillery offers a flexible and powerful way to perform load testing on your applications. By using different scenarios, variables, and configurations, you can simulate various user behaviors and identify potential bottlenecks in your system.

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