k6 extensions overcome these limitations. Function Description open( filePath, [mode] ) Opens a file and reads all the contents into memory. To authenticate requests to AWS APIs using AWS Signature Version 4, k6 offers the k6-jslib-aws JavaScript library, which provides a dedicated SignatureV4 class. js. Understand API Performance Testing. What is k6 browser module? The browser module brings browser automation and end-to-end web testing to k6 while supporting core k6 features. modules/k6/grpc Package grpc is the root module of the k6-grpc extension. K6 uses JavaScript as its scripting Dec 1, 2020 · Prerequisites: Install the k6 tool. --http-debug logs the HTTP requests and responses, skipping the body. Parameter Type Jun 25, 2024 · Package tracing implements a k6 JS module for instrumenting k6 scripts with tracing context information. And you cannot use node. k6. As your test suite grows and more people are involved in performance testing, your modularization strategy becomes essential to building and maintaining an efficient testing suite. 27. js , then k6 reports the scenarios as follows: The cron job should run on a schedule and run a delete and then apply of a k6 object. OAuth authentication. js 提供的 os、fs 等本機模組是不存在於 k6 JS 的世界的,另外 k6 也不是瀏覽器,因此瀏覽器的 window 等物件也是不存在於 k6 JS 的。 另外一個特性是 k6 的 JavaScript 是 有 IO blocking 的,因此在發出 HTTP 請求時,不需要用 await 控制流程,它會乖乖地在收到 k6 Open Source. For example, declaring the field as ComparisonResult string `js:"result" ` or hiding from JS using `js:"-" `. js con K6 Introducción a Performance Testing en Node. For additional context, see this article on dev. js, for instance the os and fs modules, won’t work in k6. js Note The report only includes graphs if the test duration is greater than three times the aggregation period value, set by the K6_WEB_DASHBOARD_PERIOD variable. Running K6 with 100S of virtual users. k6 has a few additional ways to use lifecycle functions: handleSummary(). Grafana Cloud is the easiest way to get started with Grafana k6 and performance Aug 10, 2023 · K6_DURATION=20s K6_VUS=5 k6 run path_to_your_file. js: imports the common scenario and set 1 iteration. Design and execute Sample Test Script. js to generate realistic data for the test. – Download the k6 binary. js as the default filename. 0 release includes a new execution engine and lots of new executors that cater to your specific needs. js and open a new PR to jslib. If you want to make a custom summary, k6 calls one more lifecycle function at the very end of the test. Integrations & Tools Test authoring Codeless tools to speed up the test creation. In the example above we use the http. connecting: float: Containing time (ms) spent setting up TCP connection to host. 3. io. By restricting it to the init context, we can easily determine what local files are needed to run the test and thus what we need to bundle up when distributing the test to multiple nodes in a clustered/distributed test. Run a test. 4 export const options = Product developments and news from the k6 community Jun 25, 2024 · Package tracing implements a k6 JS module for instrumenting k6 scripts with tracing context information. cookieJar() Get active HTTP Cookie jar. Ramp-up and Ramp-down Users JavaScript Extensions. min. Response Issue an HTTP POST request. Guides. Jan 11, 2024 · O código é realmente bem simples, pois não é o foco principal deste texto e sim os testes de carga com o k6. Guides Generating realistic data using faker. import http from 'k6/http'; export const options = { discardResponseBodies: true }; export default function {} export function setup() { // Get 10 random bytes as an ArrayBuffer. js --vus 2 --iterations 5 will produce output similar to the following: INFO[0000] Active VUs: 2, Iteration: 0, VU ID: 2, VU ID from runtime: 2 source=console In this webinar, learn how Grafana Cloud k6 offers you the best developer experience for performance testing. Package grpc is the root module of the k6-grpc extension. js to ensure that the added lib is importable and runnable by k6. /k6 run test-state. js You may be wondering how can you have the plots that I referenced in the previous article regarding the evolution of VUs or RPS over the time The name argument is required. /build/index. These modules are accessed over HTTP(S), from a source like the k6 JSLib or from any publicly accessible web server. Aug 17, 2022 · Besides helping me learn k6 and JS, the challenge was also a great way for me to experience the k6 documentation through the eyes of a developer. The tooling around REST APIs is vast, but there's not much focus on performance testing. User-centered observability: load testing, real user monitoring, and synthetics Learn how to use load testing, synthetic monitoring, and real user monitoring (RUM) to understand end users' experience of your apps. Since this example simulates a human user rather than an API call, it has a sleep between each request. Jun 25, 2024 · Package tracing implements a k6 JS module for instrumenting k6 scripts with tracing context information. 0 AWS Signature v4 authentication with the k6-jslib-aws. 0 and analyze your performance results with Grafana or other tools. body) left: string: The string immediately before the value to be extracted: right Remote HTTP(S) modules. Learn k6(JS) with me! Jun 2, 2022 · k6 run test. Inclusive K6 is used by Amazon, Microsoft, Grafana, Gitlab, Citrix, etc. docs. js 這麼一來就可以模擬同時 10 個使用者,在 30 秒內持續呼叫得到的結果,如果都能在合理的時間內回應,那就代表伺服器的處理能力是足夠的。 Jan 30, 2024 · If k6 doesn’t support a protocol you need, you can use (or create) extensions. js"; export const options = { "duration": "10s Parses the response body data as JSON and returns a JS object or array. Add test cases in /tests/basic. Improved performance. After downloading and extracting the archive for your platform, place the k6 or k6. k6chaijs. An extensible load testing tool built for developer happiness. k6/grpc Package grpc is the root module of the k6-grpc extension. You can read in your script the execution state during the test execution and change your script logic based on the current state. exe binary in your PATH to run k6 from any location. Write Your Performance Test Script: Scripts must contain, at the very least, a default function — this defines the entry point for your VUs, similar to the main() function in many other languages. The --summary-time-unit option forces k6 to use a fixed-time unit for all time values in the summary. Copy. import papaparse from '. 9k. Jan 11, 2023 · Here at k6, we want to start expanding our performance testing use case and also test beyond the protocol level. If no filename is provided, k6 uses script. BDD style to construct k6 assertions. Order of precedence You can set options in multiple places. Get a review from maintainers of the repository. JavaScript. httpx. js configuration. grpc Package grpc is the root module of the k6-grpc extension. After, k6 uses the environment variable (if set). The dashboard is updated continuously during the test run using server-sent events (SSE). browsers tend to do). For those cases, enabling the --http-debug option will log HTTP requests and responses to help you debugging the script. This call caches the deserialized JSON data, additional calls will return the cached data. Caution. Sep 24, 2020 · 8. js? What about k6 run main. Counter is an object for representing a custom cumulative counter metric. How to generate a constant request rate in k6; How to utilize the `scenarios` api to configure executors; Overview. Vamos começar a criar nossos testes, de acordo com os tipos descritos no post anterior. Jan 1, 2024 · figura 3— exemplo de progressão de carga no k6 … voltando ao script iremos ver também o essencial thresholds, que são as famosas verificações para garantirmos que os critérios definidos randomString(length, [charset]) - k6 Random string Field names may be explicit using js struct tags. js in the current directory. Example: Modify default output. Oct 15, 2023 · K6 is a developer-centric, open-source performance testing tool designed to be simple, efficient, and scriptable. Dec 3, 2020 · performance penalties due to the JS runtime. External JavaScript libraries for k6. This is where the k6 browser module comes in. The JavaScript runtime transparently converts Go types like int64 to their JS equivalent. Decide the testing frequency for each environment This project uses Babel and Webpack to bundle the different files into ES modules (ESM), using its webpack. k6 The k6 With these example snippets, you'll run the test locally with your machine's resources. If there are This would go against a core k6 goal: the same script should be executable in multiple modes. k6. It reads the HAR file (myfile. They benefit from having excellent performance and the flexibility of using any Go libraries. For details, refer to Custom summary. truncateVariableThreshold: 100: Variables interpolated into check message are truncated to this length. In this webinar, we'll give an overview of our two products, k6 OSS and k6 Cloud, to help you understand which solution is right for your needs. json script. Empower your development workflow with IDE extensions. For example, ChartJS is a popular JavaScript library for visualizations. Besides the common configuration options, this executor has the following options: smoke-get-api. utils. js] will use a single virtual user to execute a single iteration of your test script. ถ้าอยากอ่านง่ายขึ้นในลักษณะของกราฟบน local เราแนะนำ kx6 dashboard ถ้ากดไปตรง tab report คือมี option download ออกมาเป็น pdf ไฟล์ได้เลย See full list on github. Dec 14, 2023 · Introducción a Performance Testing en Node. g. Then, k6 uses the script value (if set). To learn more about configuring workloads in k6, check out Scenarios. Our GitHub Releases page has a standalone binary for all platforms. Using the InfluxDB extension, you can store k6 metrics in InfluxDB v2. Post-run, you will see the result summary in your terminal window, as you can see below the script was run using 1VU (virtual user) also under http_req_duration you will see k6 isn’t Node. Inclusive: max: int: Upper-end bound. Unfortunately, the v2 has introduced some breaking changes in the core parts of the API. To build a k6 binary with the extension, first, ensure you have installed Go and Git; the following steps are: Don’t confuse k6 run --out cloud script. However, if you want to keep the default output, you could import textSummary from the K6 JS utilities library. The k6/execution module provides the test execution information with the following properties Scripting examples on how to use OAuth authentication in your load test. Using k6 extensions. 38. load-get-api. js En segundo lugar, también se pueden guardar en tiempo real, en este caso no entraré en detalles porque este punto podría dar para otro artículo, pero es interesante saber que podemos integrar la herramienta Grafana k6 con Amazon CloudWatch o Grafana Cloud, entre otros. For modern engineering fail() is a simple convenience wrapper on top of JavaScript's throw(), because the latter cannot be used as [expr] || throw, which is a convenient way to write k6 test code. ; Copy the generated . k6 provides a few converters to help you incorporate the wider API tooling ecosystem into your load tests: Postman-to-k6 converter: to create a k6 test from a Postman collection. Feb 21, 2019 · You can launch a k6 process from inside of a node. k6chaijs is a library to provide BDD assertions in k6 based on ChaiJS. For example, if you run the preceding script, k6 run scenario-example. Function Description batch( requests ) Issue multiple HTTP requests in parallel (like e. Advanced Examples using the k6 Scenario API - Using multiple scenarios, different environment variables and tags per scenario. The next command transforms each TypeScript test in . js” Conclusão Por hoje é isso, turma. Update the homepage by running yarn run generate-homepage. js -e WORKLOAD=breaking? This was a simple example to showcase how you can modularize a test. Build a new minified version using the webpack command npm run webpack. Promotion Video Walkthrough. k6 cannot run TS directly, k6 can only execute JS (it uses a JS runtime k6 provides some options to filter or silence summary output: The --summary-trend-stats option defines which Trend metric statistics to calculate and show. Build the k6 version. Modify the auto-generated k6 script. Understand the Basics of K6. Jul 30, 2023 · k6 support output format json กับ csv. grpc. 4. Packages that rely on APIs provided by Node. Fundamentally the difference is the machine that the test runs on: k6 run --out cloud runs k6 locally and streams the results to the cloud. May 24, 2021 · Após a instalação do pacote “postman-to-k6”, para converter um script . k6 will generate a summary report display in the output of the test. file() API to wrap the file contents in a FileData object. For details about the runtime, refer to the Test lifecycle. html k6 run script. You can use k6chaijs as an alternative to check and group. What happens when you run k6 run main. Type conversion and native constructors. The encoding module provides base64 encoding/decoding as defined by RFC4648. A few functions are available only in init context. Lines consist of three items: type - can have the values Metric or Point where Metric means the line is declaring a metric, and Point is an actual data point (sample) for a metric. URL A module with a better and standard API exists. k6 report and results. The same goes for browser Jan 19, 2023 · K6 is an open-source load-testing tool that allows you to test the performance of web applications and APIs by simulating a large number of virtual users. Follow along to learn how to run a browser test, interact with elements on the page, wait for page navigation, write assertions and run both browser-level and protocol-level tests in a single script. post(), or any of the other HTTP request functions, where one of the property values is a FileData a multipart request will be constructed and sent. jslib. We would like to show you a description here but the site won’t allow us. json para . Explore the endless possibilities of k6 and xk6. Random item from an array Apr 11, 2023 · k6 run --out json=file. io to construct URLs with/without query parameters. Contribute to grafana/k6-action development by creating an account on GitHub. You can also specify if you want to generate a JSON file Each line either has information about a metric, or logs a data point (sample) for a metric. The name is snake_cased, with respect for certain common initialisms (URL, ID, HTTP, etc). If you use one or more k6 extensions, you need a k6 Sep 17, 2022 · k6 run --vus 10 --duration 30s scripts. Where to set Don't confuse k6 run --out cloud script. js con K6 El performance testing es una parte crucial del desarrollo de software, especialmente en aplicaciones web y APIs. The Browser recorder uses the HAR converter under the hood. Options. k6 คือเครื่องมือที่ช่วยให้เราสามารถทำ load testing ได้อย่างสนุกสนาน โดยสิ่งที่น่าสนใจของมันก็คือเราสามารถเขียน script ด้วย JavaScript ES2015/ES6 แถมยังใช้ local/remote modules In this webinar, learn how Grafana Cloud k6 offers you the best developer experience for performance testing. k6 cloud, on the other hand, uploads your script to the cloud solution and runs the test on the cloud Things don't always work as expected. Jun 25, 2024 · FieldName Returns the JS name for an exported struct field. 29. js basta digitar o comando: “postman-to-k6 nomeScript. A k6 extension that that makes k6 metrics available on a web-based dashboard. Download > _ GitHub Stars. stress-get-api. Verify that the new homepage /lib/index. timings. k6 cloud, on the other hand, uploads your script to the cloud solution and runs the test on the cloud This example utilizes faker. io/k6-utils/1. 📖 What you will learn. Then we'll go over your options for integration with Grafana and Prometheus, so your load test Field names may be explicit using js struct tags. The k6 Examples & Tutorials is a directory with common k6 examples and the most popular tutorials using k6. har) and converts it into a k6 test (loadtest. This function can only be called from the init context (aka init code), code in the global context that is, outside of the main export default function { … }. For other options to analyze test results such as storage and time-series visualizations in real-time, refer to: k6/execution provides the capability to get information about the current test execution state inside the test script. For more about running k6, refer to the Running k6 guide. /dist folder as ES modules. The imported modules are downloaded and executed at runtime, making it extremely important to make sure you trust the code before including it in a test script. With this library, you get the following: BDD style of assertions for more expressive language May 13, 2020 · By default, when the options variable is not present, k6 run [perfscript. com smoke-get-api. Running these tests requires a little more setup, the basic steps are: Create a configmap of js test files (Covered above) Create a configmap of the yaml for the k6 job; Create a service account that lets k6 objects be created and deleted The k6 core already supports the InfluxDB v1 so the natural feeling would be to do the same for the v2. html (the same as what we passed in browserTest. Suspends VU execution for the specified duration. Next steps Aug 10, 2023 · It looks like you are not transpiling your TS to JS and trying to execute the TS directly. The browser module is not available within k6 cloud as of yet. You'll get a live demo of how to create a load testing script in minutes that is realistic enough to make your test environments more production-like. xk6 and k6 extensions provide the foundation for unlocking a lot of functionality for the k6 ecosystem. Enhances Visual Studio Code with the ability to run k6 tests both on your local machine and in the k6 cloud. When passing a JS object as the body parameter to http. Supported operations on a SharedArray include: Parses the response body data as JSON and returns a JS object or array. js, then k6 reports the scenarios as follows: [Archived] Legacy k6 GitHub Action. js). (new in k6 v0. Easy to use APIs and CLI. Add a k6/experimental/fs module #3165 First, k6 uses the option's default value. js script, yes. js'; import { SharedArray } from 'k6/data'; // not using SharedArray here will mean that the code in the function call (that is what loads and // parses the csv) will be executed per each VU which also means that there will be a complete copy // per each VU const csvData = new SharedArray('another data name', function { // Load CSV file and parse it using This command creates a new script file named script. aws. constant-vus. /papaparse. func FreezeObject ¶ added in v0. Config option Default Description; truncateMsgThreshold: 300: Check message length is truncated to this value. An optional selector can be specified to extract a specific part of the data, see here for selector syntax . By implementing k6 interfaces, you can close various gaps in your testing setup: New network protocols. Executing the script as . k6 run -o experimental-prometheus-rw script. Running your test in Azure Pipelines To be able to use the marketplace extension in our pipeline, we first need to install it in our Azure DevOps organization. Subscribe to our newsletter! Product developments and news from the k6 community. blocked: float: Containing time (ms) spent blocked before initiating request. 0/index. Before the k6 starts the test logic, code in the init context prepares the script. This type of execution is useful when initially writing and debugging a performance test script. But that import http from "k6/http"; in your example is still impossible. Oct 22, 2022 · k6 run script. js, the output at the end of the Dummy package for autocompleting k6 scripts. This class can produce authenticated requests to send to AWS APIs using the http k6 module. . Visual Studio Code Extension - Run k6 How to use options k6 provides multiple places to set options: In CLI flags In environment variables In the script options object In a configuration file Most likely, your use case will determine where you want to set the particular options for a particular test. js: imports the common scenario and set 1500 reqs/s during 3m. This command creates a new script file named script. 23. ; Follow the jslib. You can have multiple SharedArrays and even load only some of them for given VUs, though this is unlikely to have any performance benefit. How to use URL and URLSearchParams imported from jslib. Response. This v0. Browser Recorder - Record a user journey to create your k6 test. k6/http The k6/http module contains functionality for performing HTTP transactions. js and /tests/testSuite. This executor is a good fit if you need VUs to ramp up or down during specific periods of time. The new k6/experimental/webcrypto API partially implements the WebCryptoAPI, supporting more features than k6/crypto. Parameter Type Description; min: int: Lower-end bound. del( url, [body], [params] ) Issue an HTTP DELETE request. For example, declaring the field as ComparisonResult string `js:“result”` or hiding from JS using `js:"-"`. 3. That is, command-line flags have the highest order of precedence. file( data, [filename], [contentType] ) Create a file object that is used for building multi-part import { check } from "k6"; import { randomIntBetween, randomItem } from "https://jslib. Test Builder - Inspired by the Postman API Builder. Parameter Type Description; content: string: The string to search through (e. Backed by 20 years of experience. The following examples take a set of arguments, shown in the function documentation, and returns the response body as JSON so that you can extract the token from. Codeless UI tool to generate a k6 test quickly. Run k6 with the following command: The k6 extension ecosystem enables developers and testers to extend k6 to cover use cases not supported natively in the core. The fourth step would run the k6 loginTest. Example. Init context Before the k6 starts the test logic, code in the init context prepares the script. It is one of the four custom metric types. Latest version: 0. This function can only be called from the init context (aka init code), code in the global context that is, outside of the main export default function { . js or a browser. timings: object: Performance timing information for the HTTP request. You can also specify a different file name as an argument to the k6 new command, for example k6 new my-test. js es un entorno de ejecución de JavaScript que es muy popular para construir aplicaciones del lado del servidor. js (what this page is about) with k6 cloud script. If you run a script with scenarios, k6 output includes high-level information about each one. There are 24 other projects in the npm registry using k6. Decide the testing frequency for each environment For simplicity to learn about k6 metric results, this tutorial uses the JSON output and jq to filter results. Finally, k6 takes the value from the CLI flag (if set). Init context. For more information. Now, you should evaluate whether you have to change any part of the k6 script. Make sure to open() the file as binary In this webinar, learn how Grafana Cloud k6 offers you the best developer experience for performance testing. Create a PR. js scripts. This command auto-generates a k6 script for you. io - Documentation Feb 12, 2022 · 承上,Node. The total number of completed iterations equals vus * iterations. Features not supported by k6 core. When to use. JavaScript API The list of k6 modules natively supported in your k6 scripts. Before you start. js Copy Optionally, you can set the testid tag as a wide test tag to segment metrics into discrete test runs and filter specific test results on the pre-built Grafana dashboards or in PromQL queries. /src to the . In the final section, I spend a little time discussing what I learned about learning. Course Curriculum Summary. js in the expected folder as index. . io procedure for creating a new version. If handleSummary() is exported, k6 does not print the default summary. Start using k6 in your project by running `npm i k6`. js system modules inside of k6 for the same reason you cannot use k6/* modules in node. The list of k6 extensions is long and includes the following: Avro; ZeroMQ; Ethereum; STOMP; MLLP; NATS; You can see the complete list of k6 extensions available in our documentation. 0, last published: 7 years ago. js: Mar 27, 2023 · k6 run --out json=metrics. The k6/crypto module provides common hashing functionality available in the GoLang crypto package. Troubleshooting. k6 ecosystem. 1 import http from 'k6/http'; 2 import {sleep } from 'k6'; 3. IDE extensions Code k6 scripts in your IDE of choice. Jul 3, 2023 · The report folder is named k6-browser-report-summary, and its path is specified as TestSummaryReport. The subcommand will create a new file with the provided name in the current directory, and populate it with a basic test script that can be run with k6 run. js: imports the common scenario and set 100 reqs/s during 3m. This example schedules a two-stage test, ramping up from 0 to 10 VUs over 20 seconds, then down to 0 VUs over 10 seconds. Take advantage of Go’s speed, power, and efficiency while providing the flexibility of using JavaScript APIs within your test scripts. If you have k6 installed on your local machine, you could run your test locally in your terminal using the command: k6 run loadtest. 5K. With the per-vu-iterations executor, each VU executes an exact number of iterations. Try the HAR converter. io; k6. // Using a binary array as body. Or alternatively, Load Testing Made Easy with K6: Using Faker Library and CSV Files by Farhan Labib in Medium. If you experience problems recording a request, try the HAR converter. Run with k6 run multiple-flows. K6_WEB_DASHBOARD=true K6_WEB_DASHBOARD_EXPORT=html-report. Next, k6 uses the options set in a configuration file via the --config flag. To run a simple local script: Copy the following code, paste it into your favorite editor, and save it as script. json smoke_test. k6 has official GitHub Actions for performing k6 testing, which is grafana/k6-action@v0. Node. Like the Browser Recorder, the HAR converter creates a k6 script from the HTTP requests included in a HAR file. VUs are completely separate JS VMs, and k6 needs some way to identify the SharedArray that it needs to return. json –o nomeDoArquivo. to . In the previous step, the converter created a k6 script for testing. js As with CSV, you have many options to visualize results from a JSON file. You can also access option values as your test runs. Run k6 with the following command: Scripting examples using URL and URLSearchParams modules. config. html is legit (Quickly done by running yarn run verify-homepage). 0) HTTP status text returned by the server. Additional lifecycle functions. It allows you to write test scripts in JavaScript, making it accessible to In the example above we use the http. When you run this test with k6 run script. The test run report can be exported to a responsive self-contained HTML file, which can be displayed even without an Internet connection. 0. bjmossjaavvwtjzmmtbi