jest-message-util

What is jest-message-util?

The jest-message-util package provides utilities for formatting and handling error messages in Jest, a popular JavaScript testing framework. It is particularly useful for creating custom error messages and enhancing the readability of test results.

What are jest-message-util's main functionalities?

formatStackTrace

The formatStackTrace function formats a stack trace to make it more readable. This is particularly useful for debugging and understanding where errors occur in your tests.

const { formatStackTrace } = require('jest-message-util');
const stack = new Error().stack;
const formattedStack = formatStackTrace(stack, { rootDir: process.cwd(), testMatch: [] });
console.log(formattedStack);

formatExecError

The formatExecError function formats execution errors to provide more context and readability. This helps in quickly identifying the cause of test failures.

const { formatExecError } = require('jest-message-util');
const error = new Error('Test error');
const formattedError = formatExecError(error, { rootDir: process.cwd(), testMatch: [] });
console.log(formattedError);

getTopFrame

The getTopFrame function extracts the top frame from a stack trace. This is useful for pinpointing the exact location of an error in your code.

const { getTopFrame } = require('jest-message-util');
const stack = new Error().stack;
const topFrame = getTopFrame(stack);
console.log(topFrame);

Other packages similar to jest-message-util

stack-utils

The stack-utils package provides utilities for working with stack traces. It offers similar functionality to jest-message-util, such as formatting and parsing stack traces, but is more general-purpose and not specifically tailored for Jest.

error-stack-parser

The error-stack-parser package is designed to parse and extract information from error stack traces. While it offers similar capabilities to jest-message-util in terms of stack trace manipulation, it does not provide the same level of integration with Jest.

pretty-error

The pretty-error package focuses on making error messages more readable by formatting them in a visually appealing way. It offers similar functionality to jest-message-util's formatting features but is more focused on aesthetics and less on integration with testing frameworks.

README

The README file is missing

Changelog

jest 22.1.0

Features

• [jest-cli] Make Jest exit without an error when no tests are found in the case of --lastCommit, --findRelatedTests, or --onlyChanged options having been passed to the CLI
• [jest-cli] Add interactive snapshot mode (#3831)

Fixes

• [jest-cli] Use import-local to support global Jest installations. (#5304)
• [jest-runner] Fix memory leak in coverage reporting (#5289)
• [docs] Update mention of the minimal version of node supported (#4947)
• [jest-cli] Fix missing newline in console message (#5308)
• [jest-cli] --lastCommit and --changedFilesWithAncestor now take effect even when --onlyChanged is not specified. (#5307)

Chore & Maintenance

• [filenames] Standardize folder names under integration-tests/ (#5298)