Load testing is highly similar to the performance testing that determines the performance of a system under serious real-life load conditions. This testing explains how an application behaves when it is accessed by multiple users simultaneously. Load testing usually identifies the following conditions given below.
It is a type of non-function testing that is commonly used for web-based apps, client-server apps both locally and globally. An environment needs to set up before you start with Load Testing.
Why choose Load Testing?
Mostly sites suffer from serious downtime when accessed by multiple users together. E-commerce sites usually spend heavily in advertising campaigns but not in load testing when the site gets the heavy traffic during its peak hours.
Here are a few examples to understand the concept little better.
For a few sites, load time was delayed as they encounter the heavy traffic. Here are the few facts for your information:
Here are the most convincing reasons why should you adopt Load testing for your next project.
The load testing mainly works on the response time of a web page. Before you start with the load testing, you should check the following:
If you are planning for load testing your API, then you should design a load testing strategy first. To create a load testing strategy, you should first understand the load requirements, scenarios, and use cases for APIs.
For a retail-based API, you should check for the peak season when product is highly in demand. For example, holidays or Cyber Monday may attract more users than weekdays. During peak time, people visit your website and perform a lot of transactions on your API.
You might decide to build baseline support for 500 users per second. You also want to check the capacity of hardware to determine the total number of servers during the peak loads. You also want to check the traffic loads at different times, and the best idea is using Google Analytics here.
Once requirements are established well, the next step is converting traffic patterns into load profiles that you will configure or build through load testing tools. Let us discuss four common load profiles that are encountered when working with load testing tools. These are:
There are several ways to perform Load Testing. Following are a few strategies for your reference.
Here is the step by step process for making the Load testing easier for you.
|Load Testing||Stress Testing|
|Load testing checks for the system bottlenecks under different load conditions and how it will react once the load on a system increases gradually.||Stress testing checks for the breaking point where the system will break once the load increases.|
Load Testing vs. Functional Testing
|Functional Testing||Load Testing|
|1). The output of functional tests is easy to determine as preconditions are defined carefully. 2). The output of functional tests varies slightly. 3). The frequency of executing load test cases is very high. 4). The output for functional test cases depends on the test data.||1). The output of load test cases is not predictable. 2). The output of load tests varies drastically. 3). The frequency of executing load test cases is low. 4). The output of load test cases depends on the number of users.|
It is revolutionizing the way how we perform load testing. It is a cloud-based testing tool that empowers the team to record tests instantly and playback comprehensively without any complex dynamic correlation. Further, you may run these test cases in real browsers at scale. The team may optimize the test coverage and cut the load testing time by 60 percent or more.
It is an enterprise-grade load testing tool designed for agile and DevOps apps. It can be integrated with your continuous delivery pipeline to support the performance across the software testing life cycle from components to full system-wide load tests.
It is an HP tool used by testers to test apps under normal to peak loads as required. It creates loads by generating virtual users that emulate the network traffic. It stimulates the real-time usage in a production environment and assures graphical results too.
It is cloud-based tool offers testing techniques on-demand. A user can perform the real browser testing along with 40+ devices to support multiple browsers together. It allows the multi-location testing with the capacity to stimulate user behavior for web apps, web transactions, portal logins, etc. in a real browser.
It is another flexible load testing tool that supports multiple integrations and allows users to run complex test scenarios. It supports different technologies, protocols, enterprise apps, and operating systems when required.
Here are a few possible Load Testing use cases and examples for your reference:
When it comes to APIs, people usually take a straightforward approach and run basic functional tests through a browser. These are acceptable starting points in case of functional testing and don’t scale up on functionality. At the same time, performance focused testing tools require a lot of custom coding when it comes to APIs or endpoints.
Features like JSON path parsing, chaining API requests in a sophisticated scenario, and validating an API schema are not the native capabilities of tools. These script-based platforms are designed to record transactions, not APIs. In this way, a lot of functionalities is lost for APIs when translated to backend APIs.
When you are working with solutions which are open source load testing solutions, you are expected to create an API test backed by a script. Although there is no scripting experience required and this script creates the load using code just written by you. What are the possible considerations if writing code for the first time?
When you are using script-based load testing tools, most of your time goes in creating and maintaining test scripts. As your scripts grow in number, you are left with maintaining scripts all day. It is also true that each program has its own style for writing the same scripts. They add their own functions and procedures to those scripts.
It generally ends up in challenges when a new tester joins the team and evaluating scripts written by programmers. Here, team leader or managers should establish a process as per coding standards to avoid issues. There are requirements of more resources and overhead that gets into solutions and usually script-based.
Here comes the concept of scriptless load testing in trend. You may prefer tools that are not based on the script and makes it easy to create a load test as per API specifications. The best example here is LoadUI for scriptless load testing. If you have already generated functional test cases, they can be converted to load tests in just a few minutes and reuse the existing functional tests as load tests with the help of SoapUI tool.
These two tools SoapUI and LoadUI enables you to perform a lot of activities with APIs; these are:
Load testing is a critical part of the software testing process as it ensures that software performs to render the maximum user satisfaction. When load testing is performed successfully, it results in high-quality software as per the latest industry standards. It is not easy performing load testing, so the best idea is taking help from experts or learn using load testing tools to make the API testing easier and more flexible for you. To know more on Load testing and similar quality concepts, join QA certification program at JanBask Training and learn using different testing tools practically.
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