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The end-of-test summary reports details and aggregated statistics for the primary aspects of the test: Summary statistics about each built-in and custom metric (e. See Params. Browser context limit. g. For details about the runtime, refer to the Test lifecycle. Imagine that you are a developer or tester who is responsible for performance in your development team. launch({ headless: false }); const page = browser. import { chromium } from 'k6/experimental/browser'; export default function () { const browser = chromium. file( data, [filename], [contentType] ) Create a file object that is used for building multi-part Options Options configure test-run behavior. vu. However, if you want to keep the default output, you could import textSummary from the K6 JS utilities library. If you stream your metrics, you can either write them to a file, like JSON, or Threshold examples to copy and paste. The Browser module introduces browser-level APIs that enable seamless interaction with browsers and facilitate the collection of frontend performance metrics as an integral part of your k6 tests. For example, the http client Then, you can use check from the k6 API to assert the text content of a specific element. cookieJar() Get active HTTP Cookie jar. For more specific threshold examples, refer to the Counter, Gauge, Trend and Rate pages. k6 The k6 Oct 19, 2023 · Check out the full list in the k6 release notes. To run a test from the k6 Cloud UI, select Run to start the test. For a top-level test overview, use the end-of-test summary. Based upon our test scenario inputs and results: The number of VUs is fixed at 10, and are initialized before the test begins; Note that arguments should not start with --(see the example). Native integration with Grafana cloud. Concepts. Observations. with a window. Let's take an example of a website with a booking form added to the homepage. k6 comes with built-in metrics about the test load and the system response. 10k series Prometheus metrics; 500 VUh k6 testing; 50 GB logs, traces, and profiles Using k6 browser The metrics module provides functionality to create custom metrics of various types. Run local tests . A 1-to-1 mapping between Browser and BrowserContext means you cannot run BrowserContexts concurrently. Think about the goal of each particular test, and make sure you track the metrics that depend on your test goals. For example, -e K6 In this webinar, learn how Grafana Cloud k6 offers you the best developer experience for performance testing. Through k6 browser, you can run browser-based performance testing and catch issues related to browsers only which can be skipped entirely from the protocol level. You can run this with or without a New Relic agent. And many people have already shared their extensions with the community! Flexible metrics storage and visualization. Set up Grafana Cloud Prometheus. If you want to make a custom summary, k6 calls one more lifecycle function at the very end of the test. 🌐 k6 browser updates. Visual Studio Code Extension - Run k6 10k series Prometheus metrics; 500 VUh k6 testing; 50 GB logs, traces, and profiles Using k6 browser Results output k6 run scenario-example. Recommended practices. The following graph depicts the performance of the example script:. If you experience problems recording a request, try the HAR converter. k6 browser updates. The quickest way to start with thresholds is to use the built-in metrics. The real power of the browser module shines when it’s combined with the existing features of k6. k6 has many output formats, which can serve as inputs for many visualization tools, both open source and commercial. io would apply the override for all subdomains of k6. Jun 12, 2023 · Smoke Test Graph 2. In k6, you can import three different kinds of modules: Built-in modules; Local filesystem modules; Remote HTTP(S) modules; Built-in modules. You can use ping messages to verify that the remote endpoint is responsive. Here are a few copy-paste examples that you can start using right away. 0 release, apart from a few bug fixes and internal improvements, the team introduced a feature to improve and stabilize the browser module’s Cookie API. When a test finishes, k6 prints a summary of results, with aggregated metrics and meta-data about the test. k6 run –address 1. Test Builder - Inspired by the Postman API Builder. The Browser recorder uses the HAR converter under the hood. k6 provides the Tags and Groups APIs to help you during the analysis and easily visualize, sort and filter your test results. Jun 20, 2023 · Now, K6 already gives many fancy metrics like http_reqs, req_duration, etc. 48. Currently, the browser module supports the standard CSS and XPath selectors. Subscribe now k6 also supports ways to narrow or widen the scope of your redirects: You can redirect only from or to certain ports. Using xk6-output-kafka extension, you can send k6 metrics in real-time to Kafka, and, optionally, ingest them from InfluxDB. To use client certificates, specify global configuration options that tell k6 how to map a public certificate and private key to the domains they are valid for Create custom metrics; Configure new summary statistics and print them to any text format. Summary statistics or granular metrics, exported to the service of your choice. It is useful when a request takes more than the expected time (more than flush interval). Based upon our test scenario inputs and results: The number of VUs is fixed at 10, and are initialized before the test begins; WebSocket. To format and send metrics to the output of your choice. For example, options are how you define test tags, thresholds, user agents, and the number of virtual users and iterations. Scale the load of your test beyond what a single machine can handle. k6 browser — and the Grafana k6 reliability testing tool, as a whole — supports proactive monitoring because it can prevent performance issues from slipping into production. 4:5678 –paused myscript. 29. If a test has a set duration or ramp down, its possible that k6 could interrupt iterations in progress. Overview. k6 provides many built-in modules for core functionalities. Get the stage index. A percentile of requests finishes in a specified duration It's also in these forums where you'll be able to get help from members of the k6 development team. For example, the following code accesses Jan 11, 2023 · You can copy one of our example scripts to get started as part of our k6 browser module documentation. k6 provides multiple options to do this. Integrations & Tools Test authoring Codeless tools to speed up the test creation. Empower your development workflow with IDE extensions. . Read more. These interruptions can lead to skewed metrics and unexpected test results. To learn more about all the types of k6 metrics, read the k6 Metrics guide Cookies with k6. This approach is also cost-effective, as a defect becomes exponentially more expensive to address when detected The Browser module brings browser automation and end-to-end web testing to k6 while supporting core k6 features. browsers tend to do). These tasks are all reproducible, so open up your favorite editor and follow along. Using k6 browser. data_sent: Browser metrics. The default summary. k6 provides built-in metrics that aggregate all the interactions against the SUT. See the browser metrics for more details. To use client certificates, specify global configuration options that tell k6 how to map a public certificate and private key to the domains they are valid for. This is an example of a four-stage test. Trend is an object for representing a custom metric that allows for calculating different statistics on the added values (min, max, average or percentiles) Oct 25, 2023 · How Grafana Faro and k6 browser complement each other. Dec 10, 2021 · By default, k6 scale and the other commands will assume you want to talk to a k6 process that is running its API server on localhost:6565, but you can use the -a/–address command line option to specify both the bind address/port for the API server (e. The following outputs include pre-built Grafana dashboards for their storage: Trend is an object for representing a custom metric that allows for calculating different statistics on the added values (min, max, average or percentiles) In this webinar, learn how Grafana Cloud k6 offers you the best developer experience for performance testing. The default is p Scenario executors. For example, -e K6 Oct 10, 2023 · Hi @nikhilgujarati, welcome to the forum!. js, then k6 While running the test, k6 sends metrics periodically to Datadog. responseType and options. Webpack setup example Setting up a Babel and Webpack project from scratch might sound like a big undertaking, but is usually accomplished within minutes. SSL/TLS client certificates Discussion about TLS certificates is usually about how clients authenticate servers. 10k series Prometheus metrics; 500 VUh k6 testing; 50 GB logs, traces, and profiles Using k6 HTTP Requests Metrics Checks Thresholds Options Test lifecycle Modules Tags and Groups Cookies Protocols Environment variables Execution context variables It's common to import modules, or parts of modules, to use in your test scripts. 3. This tutorial provides some procedures for common real-life uses of k6. Function Description batch( requests ) Issue multiple HTTP requests in parallel (like e. Example A k6 script that initiates a WebSocket connection, sends a ping, and closes it using the onopen handler. K6_BROWSER_IGNORE Scripting examples on how to use OAuth authentication in your load test. Page object model pattern Jun 27, 2023 · k6 browser updates. examples; No results for “ ” Product developments and news from the k6 community. K6_INFLUXDB_CONCURRENT_WRITES: 4: Number of concurrent requests for flushing data. By default, that server listens on localhost:6565 , but that can be modified by the --address CLI flag. Large extension ecosystem. The flexibility and interoperability of Grafana and k6 let you visualize test and observability data in one dashboard, regardless of where the data is stored. For granular output of all metrics (with timestamps), you stream metrics in real time. You can optionally tag all values added to a custom metric, which can be useful when analysing the test results. 2. A directory full of 10k series Prometheus metrics; 500 VUh k6 testing; 50 GB logs, traces, and profiles Using k6 browser Results output For example: value < 200; value > 1; Examples. You can extend k6 to support your needs. How to use the timeout and interval functions to stop the connections after some period. Use xk6-output-prometheus-remote to publish your k6 test metrics to Prometheus as well! To improve script performance and efficiency Oct 16, 2023 · In this blog post you will learn how to get started with browser performance testing using k6. 0, we support unary gRPC requests. Dec 14, 2023 · Check out the full list in the k6 release notes. k6 takes specific measurements for Websockets. It returns a zero-based number equal to the position in the shortcut stages array or in the executor's stages array. gRPC is a lightweight open-source RPC framework. Codeless UI tool to generate a k6 test quickly. The default is p Example: Modify default output. Build the k6 version To build a k6 binary with the extension, first, ensure you have installed Go and Git ; the following steps are: Using k6 browser. Rate is an object for representing a custom metric keeping track of the percentage of added values that are non-zero. The new browser implementation limits the usage to a single active BrowserContext per iteration. It adds browser-level APIs to interact with browsers and collect frontend performance metrics as part of your k6 tests. To deal with this, k6 scenarios have a gracefulStop. Key metrics include: Aug 10, 2023 · Source: Comparing k6 and JMeter for load testing From this plot, you can see that k6 provides an high rate of maximum RPS and a low memory consumption. Subscribe now Jan 8, 2023 · This post explains how to get started with k6 browser, a k6 experimental module that adds browser-level APIs to interact with browsers and collect web performance metrics as part of your Grafana k6 tests. Try the HAR converter. Metrics. Advanced Examples using the k6 Scenario API Using k6 browser. You can customize this, or configure the test to write granular metrics to a file. 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. k6 is optimized for minimal resource consumption and designed for running high load tests (spike, stress, soak tests) . Init context Before the k6 starts the test logic, code in the init context prepares the script. k6 browser lets you automate browser actions and collect web performance metrics. protocol load e. You can: Discussion about TLS certificates is usually about how clients authenticate servers. Finally, you close the page and the browser. The example performed ~300 iterations over the course of the test. Client-side performance is paramount to validate the performance of your application along with the network load i. 42. Running browser tests Running browser tests. Find blind spots and errors Browser-based performance testing can catch issues related to browsers that won't be detected on the protocol-level. io. 47. Path: K6_INFLUXDB_PUSH_INTERVAL: 1s: The flush's frequency of the k6 metrics. The dashboard is updated continuously during the test run using server-sent events (SSE). A common use case is to collect metrics of a particular scope of your test. APIs. By default, these metrics have k6. Get started with k6-operator This example covers how to track data for an individual URL. In k6, you can split the load of a test across multiple k6 instances using the execution-segment option. For details, refer to Custom summary. In this webinar, learn how Grafana Cloud k6 offers you the best developer experience for performance testing. Browser performance testing. In the example above we use the http. Browser testing. An overview of the k6 resources beyond the k6 docs: Browser metrics. When passing a JS object as the body parameter to http. file() API to wrap the file contents in a FileData object. To run a simple local script: Create and initialize a new script by running the following command: Therefore, this option is the default of this output and converts all the k6 Trend metrics to Counter and Gauges Prometheus metrics. discardResponseBodies for how to discard the body when it is not needed (and to save memory) or when handling bodies with binary data. Testing of your cookie-based web site or app will just work without requiring any special action of you. For most purposes, k6 transparently manages the reception, storage, and transmission of cookies as described. To get k6 metrics into New Relic, k6 sends metrics to the New Relic StatsD integration which will take care of collecting, aggregate, format and send the telemetry to the New Relic Telemetry Data Platform. If you wish to create a new BrowserContext while one already exists, you will need to close the current one, and create a new one with either newContext or newPage . We consider browser automation an important part of web application testing, and we have big goals for k6 browser. 10k series Prometheus metrics; 500 VUh k6 testing; 50 GB logs, traces, and profiles Using k6 browser Results output In the preceding example, the timeout will Using k6, you can stream your local test results to any backend. tags object's properties can indeed be directly assigned new key/value pairs to define new tags dynamically. For long-running scripts, custom metrics might appear only after the test runs a while. 45. Example. Common k6 use cases are: Load testing. The browser module API is used to create a new BrowserContext. With k6 metrics in Grafana, you can correlate k6 metrics with other metrics of your observability stack. Get insights to your user experience by also capturing browser performance metrics alongside existing protocol metrics. To use the k6 CLI to run a local or cloud test, copy the generated script to your local text editor and execute the k6 run or k6 cloud command to start the test. : devices: Returns predefined emulation settings for many end-user devices that can be used to simulate browser behavior on a mobile device. Property Description; browser: The browser module API is the entry point for all your tests. You can also utilize tags and custom metrics to categorize and filter results for one interaction or particular types. Executors configure how long the test runs, whether traffic stays constant or changes, and whether the workload is modeled by VUs or by arrival rate (that is, open or closed models). You can configure how to convert all the k6 trend metrics with the K6_PROMETHEUS_RW_TREND_STATS option that accepts a comma-separated list of stats functions: count, sum, min, max, avg, med, p(x). Create a k6 extension. Troubleshooting. k6. k6 browser module aims to provide k6/http The k6/http module contains functionality for performing HTTP transactions. In the case of browser tests, you can see here the metrics reported by the browser module. Examples. K6_INFLUXDB_TAGS_AS_FIELDS: vu:int,iter:int,url: A comma-separated string to set k6 metrics as non Since k6 browser aims to provide rough compatibility with the Playwright API, you can leverage any existing page objects you have and easily re-use them with your k6 browser tests. These topics explain the essential concepts of how scenarios and their executors work. k6 also supports ways to narrow or widen the scope of your redirects: You can redirect only from or to certain ports. When writing browser-level tests, it's recommended to use selectors that are robust to avoid test flakiness when the DOM structure changes. 0, you can use an asterisk (*) as a wild card at the start of the host name to avoid repetition. The only HTTP related metrics that are reported are browser_http_req_duration and browser_http_req_failed. As an example, create a metric that collects latency results for each group: Import Trend from the k6 metrics module. Starting from v0. Using k6 browser Results output; Testing guides which could bring a large number of unique URLs into the metrics stream. However, if the built-in metrics aren’t enough, you can create custom metrics. Our roadmap details essential status updates and our short, mid, and long-term goals. Sure, you can go through each of the metrics one-by-one, to understand what they represent and what the values are. Involves testing an application’s performance under expected loads. Custom metrics are collected from VU threads only at the end of a VU iteration. mean, median, p95, etc). Therefore, this option is the default of this output and converts all the k6 Trend metrics to Counter and Gauges Prometheus metrics. These core metrics will evolve over time when technology changes, but for now, k6 tracks the following core web vitals: Results output k6 emits metrics with timestamps at every point of the test. The k6 browser module emits its own metrics based on the Core Web Vitals. The Closing of the page is critical for the calculation of accurate Web Vital metrics. Hybrid approach to performance; Page object model pattern; Selecting elements k6/execution. Stream the results to one or multiple services of your choice (for example, InfluxDB or Prometheus). 0 release, the team has continued to add bug fixes and improvements, which include: Removing existing browser_* metrics in favor of Google Web Vital metrics. The gracefulStop is a period at the end of the test in which k6 lets iterations in progress finish. If any of the thresholds had failed, the little green checkmark next to the threshold name (http_req_failed, http_req_duration) would be a red cross and k6 would exit with a non-zero exit code. They assume no prior knowledge of k6 or of JavaScript. Browser Recorder - Record a user journey to create your k6 test. Suppose your company has consolidated its observability metrics into Prometheus. Before you start, you need the following: A Grafana Cloud account . Different ways k6 can schedule VUs, their affects on test results, and how k6 implements the open model in its arrival-rate executors: Graceful Stop: A configurable period for iterations to finish or ramp down after the test reaches its scheduled duration: Arrival-rate VU allocation: How k6 allocates VUs in arrival-rate executors: Dropped Dec 19, 2023 · The k6 Browser module brings browser automation and end-to-end web testing to k6 while supporting core k6 features. Through the k6 browser API, you can run browser-based performance tests and collect browser metrics to identify performance issues related to browsers. However, both TLS and k6 also support the reverse process, in which servers authenticate clients. e. Documentation: Using metrics. Additional lifecycle functions. k6-rollup-example: Example using Rollup to bundle k6 tests and release a shared library. For the complete list, refer to the Metrics reference. k6 considers this test a pass and exits with an exit code 0. k6 has a few additional ways to use lifecycle functions: handleSummary(). If a page opens another page, e. Create custom metrics; Configure new summary statistics and print them to any text format. K6_INFLUXDB_TAGS_AS_FIELDS: vu:int,iter:int,url: A comma-separated string to set k6 metrics as non Run the test locally or in k6 Cloud. true by default. With that said, we need your help! k6 is optimized for minimal resource consumption and designed for running high-load performance tests such as spike, stress, or soak tests. js) and where the k6 that you want to Get started with k6. In the k6 0. A few functions are available only in init context. JavaScript API The list of k6 modules natively supported in your k6 scripts. ping() Send a ping. 46. After one minute, the iteration rate ramps to 600 iterations started per minute over the next two minutes, and stays at this rate for four more minutes. K6_BROWSER_HEADLESS: Show browser GUI or not. For ideas, read Ways to visualize k6 results. These metrics are pretty useful, I agree, but they mean nothing, if the user is not able to make the head or tail of the metrics. A k6 extension that that makes k6 metrics available on a web-based dashboard. This can prove useful, as demonstrated in the following example, to track a container's group from nested groups, and aggregating nested group's sub-metrics. However, if the built-in metrics aren't enough, you can create custom metrics. The following is an example of a browser-based load testing script in k6 using the browser module on a dummy website. Load Testing. In some cases, though, you might want more control over cookies. This would go against a core k6 goal: the same script should be executable in multiple modes. Like the Browser Recorder, the HAR converter creates a k6 script from the HTTP requests included in a HAR file. k6 browser lets you automate browser actions and collect web performance metrics for your k6 tests. On this page Read about&mldr; How to use options How to set options in different places (with examples), how to override options, and how to access the value of an option as the test runs. Options reference Every option, with However, k6 now has an experimental module called k6 browser that allows the creation of browser-based test scripts alongside protocol-based ones. Run both browser-level and protocol-level tests in a single script. The test run report can be exported to a responsive self-contained HTML file, which can be displayed even without an Internet connection. You can output the metric results as either aggregated statistics or individual data points. A list of awesome stuff about k6. Scripting example on how to handle HTML forms in a k6 test. Implementation. For example: For more about running k6, refer to the Running k6 guide. . This example shows: How a single VU can run multiple WebSockets connections asynchronously. HTTP, WebSockets, gRPC, Browser, and more. Let’s take an example of a website with a booking form added to the homepage. If handleSummary() is exported, k6 does not print the default summary. k6 applies a scenario tag to all metrics in each scenario, whose value is the scenario Observations. Trouble? Try the HAR Selectors are strings that represents a specific DOM element on the page. Before version v0. The goal is to assess the behaviour of the system when subjected to typical usage patterns How to configure k6 to send HTTP traffic through a web proxy for debugging k6 tests. 43, k6 has added an experimental module for xk6-browser, which means you can write browser tests without using external extensions. See also. K6_BROWSER_DEBUG: All CDP messages and internal fine grained logs will be logged if set to true. With the k6 0. The console should log connection is alive, since the recipient should automatically emit the pong event. 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. Key metrics include: This section presents some examples and recommended practices when working with the k6 browser module to leverage browser automation as part of your k6 tests. When k6 starts, it spins up an HTTP server with a REST API that can be used to control some parameters of the test execution. import http from 'k6/http'; import { check } from 'k6'; const username = 'user'; const password = 'passwd'; export default function { // Passing username and password as part of URL plus the auth option will // authenticate using HTTP Digest authentication. Although a single k6 instance can generate enormous load, distributed execution is necessary to: Simulate load from multiple locations simultaneously. The k6/metrics has examples for defining each type of custom metric, and for defining a threshold on the metric. You can load the At this point, it’d be nice to have a graphical interface to visualize metrics as they occur. As you have seen in the output, all k6 tests emit metrics. K6_INFLUXDB_PUSH_INTERVAL: 1s: The flush’s frequency of the k6 metrics. For more about running k6, refer to the Running k6 guide. Run the New Relic integration as a Docker container with this command: Scripting example on how to use WebSocket API in k6. Additionally, you can mix Response body content, often used to extract dynamic data (see examples here) and when verifying the presence of content using checks. For example, *. You can visualize k6 metrics in real-time with the metrics explorer, monitors, or custom dashboards. Function Description open( filePath, [mode] ) Opens a file and reads all the contents into memory. 10k series Prometheus metrics; 500 VUh k6 testing; 50 GB logs, traces, and profiles Using k6 browser Results output Documentation Grafana k6 Examples Get A default BrowserContext is created when a browser is launched. Jun 28, 2023 · Check out the full list in the k6 release notes. To get the current running stage index, use the getCurrentStageIndex helper function from the k6-jslib-utils library. 0 release, the k6 browser now supports CPU and network throttling! 🥳 Websocket metrics. K6_BROWSER_EXECUTABLE_PATH: Override search for browser executable in favor of specified absolute path. This short tutorial will walk you through the steps to build a k6 extension for Redis and use it in your k6 test. Distributed k6 tests on K8s. Once a change is detected, the operator will react by modifying the cluster state, spinning up k6 test jobs as needed. With xk6-browser, you can interact with the browser to test your web applications end-to-end while accessing all of the k6 core features, including protocol-level APIs and other k6 extensions. Deploy the k6 operator in your Kubernetes cluster to run distributed k6 tests. Counter; Gauge; Rate; Trend Jan 11, 2023 · We also have further plans to integrate k6 browser in k6 cloud as part of a private beta. Jul 3, 2023 · Prerequisite: To use the k6 browser test, ensure you use version v0. as the name prefix. Starting with k6 v0. With these example snippets, you'll run the test with your machine's resources. IDE extensions Code k6 scripts in your IDE of choice. These characteristics aren’t observed in Since k6 browser aims to provide rough compatibility with the Playwright API, you can leverage any existing page objects you have and easily re-use them with your k6 browser tests. It starts at the defined startRate, 300 iterations per minute over a one minute period. open call, the popup will belong to the parent page’s BrowserContext. 10k series Prometheus metrics; 500 VUh k6 testing; 50 GB logs, traces, and profiles Using k6 browser Results output In the example script, k6 establishes a Nov 24, 2021 · Introducing k6 browser automation With the launch of the xk6-browser extension, the k6 team delivers the most requested feature within the community. But, if you have a k6 Cloud account, you can also use the k6 cloud command to outsource the test to k6 servers. Sample browser-based test script. Here are some additional resources to help on your learning journey: Distributed load testing using Kubernetes with k6 (k6 Office Hours #72) Demo for k6-operator; Blog: Running distributed k6 tests on Kubernetes Each TestRun object references a k6 test script, configures the environment, and specifies the number of instances, as parallelism, for a test run. For each k6 scenario, the VU workload is scheduled by an executor. 43 and above. While this topic uses Grafana Cloud as an example, this approach is compatible with any remote write capable Prometheus installation. In this case, the test met the criteria for both thresholds. del( url, [body], [params] ) Issue an HTTP DELETE request. 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. 43, there was a need to download the k6 extension for writing browser tests, but with the release of version 0. This section presents some examples and recommended practices when working with the k6 browser module to leverage browser automation as part of your k6 tests. Different scenario configurations can affect many different aspects of your system, including the generated load, utilized resources, and emitted metrics. Migrating to k6 v0. All metrics (both the built-in metrics and the custom ones) have a type. See the example and the API below. newPage(); } Let’s break down what’s happening with the preceding code. 10k series Prometheus metrics; 500 VUh k6 testing; 50 GB logs, traces, and profiles Using k6 browser Browser metrics . Browser metrics. or jf az he oo ui ah xa lz zi