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jest-util

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jest-util

This packages is a collection of utilities and helper functions

  • 29.7.0
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What is jest-util?

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.

What are jest-util's main functionalities?

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));

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Package last updated on 12 Sep 2023

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