![]() Non-scriptable tools generate requests to one or multiple endpoints without any correlation between the requests providing the option to define a constant request rate to hit an endpoint. Historically, there are two types of categories of load testing tools: scriptable and non-scriptable. This is the point that distinguishes k6 from most of the currently available load testing tools, in that it can be used to test realistic user flows, instead of just relying on hammering a set of endpoints.Ĭopy Virtual Users vs. This way you can test the flow of your users' navigation in your application or platform. For the sake of simplicity, only four requests has been shown, but you can easily add additional requests to have a more realistic user experience. So from iterations and vus you deduct that you'll likely run each VU around 10 iterations, depending on your API response time and network roundtrip.Īs you can see, this is a fairly normal, yet simple, user flow that tries to mimic the user behavior while using our mobile App or website. vus is a number specifying the number of concurrent sessions (virtual users) to your API. Iterations is a number that specifies how many iterations (executions) of the script per VU should happen, which is divided by the number of virtual users. In the beginning of the script, we've also added a set of options used to control your script. We also pause after each request and response, for the API to keep up and not be flooded. Each request has unique characteristics, accepts some parameters and finally returns a response, which is checked against a set of rules. In the following example, you see four consecutive HTTP requests to your API to log in, fetch user profile, update user profile and finally log out. if you want to test endpoints in isolation, it is recommended that you take into account other endpoints and write a scenario-based load test script. While hammering is good in some cases, e.g. It is really easy to use by providing a easy-to-use command line interface: ![]() K6 binaries are available for various platforms, so you don't need to install a language runtime anymore. automating your load testing in your CI tool.having the option to set thresholds on your requests to achieve your SLOs.(For example, you can log in to your API, extract the API key from the response, and use it to make other requests, with a unique API key dedicated to that specific session.) using correlation to easily connect various requests together.writing your tests in this well-known scripting language, ES5.1(+).Using this tool will help you achieve more by giving you the possibility of: This is different from other tools, which are focused more on simple testing by hammering one or multiple endpoints via predefined requests, in that, you can write a user-flow scenarios in JavaScript to do all sorts of load testing. You can write JavaScript code to load test your API. Our developer-friendly tool for load testing is k6. You'll also learn about our tools, which helps you generate or convert your existing API documentation or tests into k6 scripts. In this guide, you'll learn how to do API load testing and what the best practices are. One type of testing the API is to put load on it to see how it performs, hence the load-testing. From unit- to performance-testing, you need to have plans and execute them with great care. ![]() It is crucial to test your API with various testing methods and tools. ![]()
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