An in-depth guide on integrating lint-staged with jest and utilizing --collectCoverageFrom

I have incorporated lint-staged along with Jest testing framework to solely test the files that have been altered since the last commit, following the instructions outlined in this blog.

Here is my current configuration:

"src/**/*.{ts}": [
  "prettier --write",
  "tslint --fix --project .",
  "jest --bail --findRelatedTests",
  "git add"
]

In addition to running tests on only changed files, I aim to generate a coverage report for these specific files. This requires listing the changed files in multiple places.

jest --bail --findRelatedTests <spaceSeparatedListOfSourceFiles> --collectCoverageFrom=<glob>

Can anyone guide me on how to restrict both testing and coverage reports to only modified files using lint-staged?

javascriptjsontypescriptjestjslint-staged

Answer №1

Just discovered a new tool called lint-staged. Excited to give it a whirl as I've been on the lookout for something like this for a while now.

Have you had a chance to test out:

"jest --bail --coverage --findRelatedTests",

The Jest documentation mentions that using findRelatedTests alongside --coverage can simplify test coverage inclusion without repeating --collectCoverageFrom arguments.

Seems promising, but I haven't given it a go yet.

Answer №2

To ensure proper functionality, make sure to specify the collectCoverageFrom parameter like this:

--collectCoverageFrom="<rootDir>/src/components/Home/index.js"

If you have multiple files, define each one individually:

--collectCoverageFrom="<rootDir>/src/components/Home/index.js" --collectCoverageFrom="<rootDir>/src/components/Home/utils.js"

Alternatively, you can use a glob pattern:

--collectCoverageFrom="<rootDir>/src/components/Home/*"

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

How can I loop through this MongoDB JSON data in a Pug template?

I am trying to display the data from my MongoDB JSON in a specific format shown below: index date 1 1/18/2019, 11:10:05 PM 2 1/18/2019, 11:10:19 PM 3 1/18/2019, 11:13:29 PM This is the MongoDB code snippet: { "_id" ...

node.jsjsonmongodbexpresspug

Combining element.scrollIntoView and scroll listener for smooth scrolling by using JavaScript

Can element.scrollIntoView and a "scroll" event listener be used simultaneously? I'm trying to create code that checks if the user has scrolled past a certain element, and if so, automatically scrolls smoothly to the next section. I attempted to achi ...

javascripthtmlcss

Regular expressions can be used to extract all attributes from a webpage that begin with a specified value

I have a simple question - how can I retrieve the values of all attributes that start with http://example.com/api/v3?? For instance, if a webpage includes: <iframe src="http://example.com/api/v3?download=example%2Forg"> <meta twitter="http://exam ...

javascripthtmlregexuserscripts

What is the process for removing a registered user from Realm Object Server with the use of the Javascript library?

I have been searching online for a solution, but I haven't been able to find an answer. I am attempting to remove a user from ROS, however, I cannot locate a designated API for this task. The version of my realm-js is 1.10.3. If this feature does not ...

javascriptnode.jsrealm

Executing a query with a `has many` relationship in MongoDB: Step-by-step guide

In my setup with Node, Express, and backbone, I am successfully retrieving records from MongoDB collections using simple queries. However, I am struggling to understand how to query more complex data, such as the one below: db.employees.aggregate( [ ...

javascriptnode.jsmongodbexpressbackbone.js

An unexpected issue occurred: Unable to invoke method on NPObject

I am new to JSON and having trouble accessing object data. Here is the code snippet: <!doctype html> <html> <head> <meta charset="utf-8"> <title>ajax </title> </head> <body> <p id="p"></p& ...

javascripthtmljson

Updating parameters in Node.js with mongoose

script.js var mongoose = require('mongoose'); var Schema = mongoose.Schema; var scriptSchema = new Schema({ status: {type: String, default: 'INCOMPLETE'}, code: String, createdDate: {type: Date, default: Date.now}, user: {t ...

javascriptnode.jsmongodb

Ways to address issues in my tree-building algorithm when the parent ID is missing

Currently, I'm in the process of creating a function to build a tree. Everything seems to be functioning correctly until I encounter a scenario where a document is added with a parentID that doesn't exist in the list. The root node is intended to ...

javascriptjson

What steps are involved in extracting post data from the javascript DOM using php?

Having an issue where my JavaScript sends data to PHP, but the parsing in PHP keeps failing. The data is received by PHP and displayed in a text area, however, it needs proper formatting before being parsed. Can anyone advise on how to correctly format the ...

javascriptphpjsonurldecode

The state update is triggering a soft refresh of the page within Next.js

In my Next.js project, I have integrated a modal component using Radix UI that includes two-way bound inputs with state management. The issue arises when any state is updated, triggering a page-wide re-render and refreshing all states. Here is a snippet of ...

javascriptreactjstypescriptnext.jsstate

Tips for ensuring that the code inside a subscribe block completes before moving on to the next iteration within a forEach loop in Angular

Within the code snippet below, there exists a for loop where an API call is made. The intention is to have the 1st API call complete and execute all the subscribed code before moving on to the next iteration of the loop, triggering another API call. Curre ...

angulartypescriptobservableangular-promiseangular-observable

Preserving scroll position during page navigation in Next.js

Currently, I am working on a website using the Next.js boilerplate. Here is the routing code that I am using: import Link from 'next/link' <Link href={{ pathname: '/some-url', query: { param: something } }}> <div> ...

javascriptnext.jsscroll-position

Why does the data continue to remain empty?

I am currently working with a JSON object: {"suggestions":["M.I.A.","M.","Mindless Self Indulgence","The Cure","Telefon Tel Aviv","M","J. Ralph","Jason Mraz","Carbon Based Lifeforms","Cycle of Pain","Chantal Kreviazuk","-M-","ayumi hamasaki","R.E.M.","Don ...

jqueryjson

Revamp intricate JSON array with Jolt for optimum transformation

When working with an external API, I am receiving a complex JSON structure that needs to be transformed into a simpler JSON format according to our requirements. Although Jolt has the capability to transform JSON, I'm struggling to devise the appropri ...

javajsonjolt

Tips for selecting specific types from a list using generic types in TypeScript

Can anyone assist me in creating a function that retrieves all instances of a specified type from a list of candidates, each of which is derived from a shared parent class? For example, I attempted the following code: class A { p ...

javascripttypescript

An Uncaught TypeError is thrown when using setTimeout()

Currently, I am configuring the .hover() function in the code below: $(".portfolio_overlay").hover(function(){ setTimeout(function(){ $(this).fadeTo(750, 0.72, "swing", function(){}); }); }); An error is being displayed on the console: U ...

javascriptjquerysettimeout

What are the steps for leveraging a proxy with NodeJS and Selenium?

While researching the topic on proxies in the documentation, I came across a method to set up a proxy while building a driver like this: var driver = new webdriver.Builder() .withCapabilities(webdriver.Capabilities.chrome()) .setProxy(proxy.manual ...

javascriptselenium

Encountering an issue while trying to pass hidden value data in array format to the server side

I am currently learning how to use Handlebars as my templating engine and encountering an issue with passing over data from an API (specifically the Edamam recipe search API). I am trying to send back the array of ingredients attached to each recipe card u ...

javascriptexpresshandlebars.js

Perform a child component function in Angular

I'm working on a project with a child component as a map and a parent component as a form. The parent component has a field for writing the address, and when an address is entered, an HTTP request is triggered to find the latitude and longitude coordi ...

angulartypescript

Error retrieving property in Internet Explorer when using AJAX

Encountering error message Unable to get property ‘replace’ of undefined or null reference on line var ajax_html = $(xml).find("#search-ajax-content").html(); while utilizing AJAX in IE (specifically testing with IE11). This code operates without any g ...

javascriptjqueryajax