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jest-util
Advanced tools
Package description
The jest-util package provides utility functions for Jest, a popular JavaScript testing framework. It includes a variety of helpers and tools that are used internally by Jest but can also be useful for developers working with or extending Jest tests.
Console Replacement
This feature allows for the creation of a custom console that buffers all logs. This is useful for controlling and testing console output during test runs.
const { BufferedConsole } = require('jest-util');
const customConsole = new BufferedConsole();
customConsole.log('Hello, this is a buffered log.');
Error Formatting
This function formats execution errors for display in Jest's output, providing a standardized view of test errors, including stack traces.
const { formatExecError } = require('jest-util');
const error = new Error('Test error');
const config = {rootDir: '/path/to/project', testMatch: []};
console.log(formatExecError(error, config, {noStackTrace: false}, undefined, true));
Test Path Normalization
This utility normalizes file paths for glob matching, which is particularly useful on Windows where path separators differ.
const { replacePathSepForGlob } = require('jest-util');
const path = 'path\to\test\file.js';
console.log(replacePathSepForGlob(path));
Chai is an assertion library similar to jest-util in that it is used to help with testing JavaScript applications. Unlike jest-util, Chai focuses more on providing a rich set of assertions rather than utilities for managing Jest environments or outputs.
Mocha is a test framework that, like Jest, can utilize utility packages for enhanced testing capabilities. While jest-util specifically supports Jest, Mocha has its own set of utilities and plugins that serve a similar purpose but are tailored to Mocha's ecosystem.
Sinon provides standalone test spies, stubs, and mocks for JavaScript. It complements jest-util by offering more focused functionalities for creating and managing test doubles, which can be used alongside or independently of Jest.
FAQs
This packages is a collection of utilities and helper functions
We found that jest-util demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 3 open source maintainers collaborating on the project.
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