Thanks to that it can automatically detect git commit hash, branch name, number of parallel CI nodes, etc. CI providers environment variables integration - Knapsack Pro Core library can read environment variables for popular CI providers.reading environment variables specific to Knapsack Pro client like API token, log level, API endpoint URL, etc.It can respond to, and handle common response types and errors coming from the API. Knapsack Pro client is built as 2 packages: You will see how to build a Knapsack Pro client from scratch based on the JavaScript example. You can get some ideas about code organization and technical requirements for building a Knapsack Pro client from scratch. Those are lightweight NPM packages and the source code is easy to understand. For the Jest testing framework we created another package for the Jest testing framework that uses The NPM package contains business logic responsible for integration with the Jest library so you can run Jest tests in parallel using Knapsack Pro API.īefore you start building your own Knapsack Pro client in your programming language I highly recommend reading the article where we covered how and work. In order to integrate with Knapsack Pro API in JavaScript, we created an NPM package called This package knows how to communicate with Knapsack Pro API and how to read environment variables for various CI providers.Īs you probably know, there are many testing frameworks written in JavaScript, e.g. Before we start learning how to build a Knapsack Pro client from scratch in your favorite programming language, let’s check how such a client looks like in JavaScript. Please read the article about the difference between Regular Mode and Queue Mode to learn about it in detail and see some graphs showing the difference. It’s repeated until all tests are executed and the Knapsack Pro API has no more test files in the Queue. Once completed, it asks for another set of tests. In this case, each parallel CI node asks Knapsack Pro API for a set of tests and runs it. Knapsack Pro Queue Mode - it’s a dynamic way of splitting tests between parallel CI nodes. Basically, before starting tests we know up front what set of test files should be run on each parallel CI node. Knapsack Pro Regular Mode - it’s a static split of tests between parallel CI nodes (performed deterministically). In JavaScript, you can find Jest, Puppeteer, Karma, Jasmine, Cypress, TestCafe, etc. For instance, in Ruby programming language there are test runners like RSpec, Cucumber, Minitest. Test runner (testing framework) - each programming language has its own testing framework. Here is a list of existing Knapsack Pro clients. Simply speaking, Knapsack Pro client is a wrapper around test runner (testing framework) in a given programing language. It knows how to run tests for test runners like RSpec, Cucumber, Minitest, etc. For instance, the Knapsack Pro client in Ruby programming language is a knapsack_pro ruby gem. Knapsack Pro client also knows how to integrate with a test runner in a given programming language. Knapsack Pro client connects with the Knapsack Pro API to fetch a list of test files to run a proper set of tests on a given parallel CI node. The client knows how to read environment variables for various CI providers to automatically detect git commit hash, branch name, number of total parallel CI nodes, and CI node index. It contains business logic responsible for connecting with Knapsack Pro API. Knapsack Pro client - is a library that you install in your project. Here is the documentation for all API endpoints. Knapsack Pro API will use the data to better predict how to split your test files in future CI build runs. Your API client is going to send recorded time execution of your test files to the API to see results in the Knapsack Pro user dashboard. Knapsack Pro API - it’s an API responsible for deciding how to split test files between parallel CI nodes. Please see below the dictionary of terms we will use in this article: Learn what Regular Mode and Queue Mode are in Knapsack Pro and how they work. Introduction - learn basicsįirst, you need to understand what Knapsack Pro does and how it splits test files in parallel CI nodes to run your CI build fast. Here you can find the list of existing Knapsack Pro clients to run your tests in parallel for programming languages like Ruby, JavaScript, and their testing frameworks. You will see what’s needed to build from scratch Knapsack Pro API client similar to our existing clients like knapsack_pro Ruby gem, for Jest in JavaScript, or for Cypress test runner (also in JavaScript). You will learn how to integrate with Knapsack Pro API to run parallel tests in any programming language for any testing framework.
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