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The empower npm package is a tool designed to enhance assertion libraries by providing more detailed and readable assertion error messages. It works by instrumenting assertion functions to capture additional context and information about the assertions being made.
Enhanced Assertion Messages
This feature allows you to use enhanced assertion messages that provide more context and detail about the assertion failure, making it easier to debug.
const assert = require('assert');
const empower = require('empower');
const enhancedAssert = empower(assert);
try {
enhancedAssert.equal(1, 2);
} catch (e) {
console.log(e.message); // Outputs detailed assertion error message
}
Integration with Various Assertion Libraries
Empower can be integrated with various assertion libraries, allowing you to enhance the error messages of your existing assertions without changing your testing framework.
const assert = require('assert');
const empower = require('empower');
const enhancedAssert = empower(assert);
try {
enhancedAssert.deepEqual({ a: 1 }, { a: 2 });
} catch (e) {
console.log(e.message); // Outputs detailed assertion error message
}
Customizable Output
You can customize the output of the enhanced assertion messages by configuring empower with different patterns and options.
const assert = require('assert');
const empower = require('empower');
const enhancedAssert = empower(assert, { patterns: ['assert.*'] });
try {
enhancedAssert.equal(1, 2);
} catch (e) {
console.log(e.message); // Outputs detailed assertion error message
}
Chai is a BDD / TDD assertion library for node and the browser that can be delightfully paired with any javascript testing framework. Unlike empower, Chai provides a rich set of assertion styles and plugins, but it does not focus specifically on enhancing error messages.
Should is an expressive, readable, and powerful assertion library for node. It extends the Object prototype with a single non-enumerable getter that allows you to express assertions in a natural language style. While it provides readable assertions, it does not focus on enhancing error messages like empower.
Expect is a minimalistic assertion library that works well with Jest. It provides a set of assertion functions and is designed to work seamlessly with Jest's test runner. Unlike empower, it does not focus on enhancing error messages but provides a simple and straightforward API for assertions.
Power Assert feature enhancer for assert function/object.
empower
is a core module of power-assert family. empower
enhances standard assert
function or any assert-like object to work with power-assert feature added code instrumented by espower.
empower
works with standard assert
function (best fit with Mocha), and also supports assert-like objects/functions provided by various testing frameworks such as QUnit, buster.js, and nodeunit.
Please note that empower
is a beta version product. Pull-requests, issue reports and patches are always welcomed. See power-assert project for more documentation.
Licensed under the MIT license.
FAQs
Power Assert feature enhancer for assert function/object
The npm package empower receives a total of 97,740 weekly downloads. As such, empower popularity was classified as popular.
We found that empower demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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