WiTests

WiTests is a lightweight, simple, and extensible testing library for Node.js projects. It allows you to define and run tests with a focus on clear organization and easy debugging.

Features

• Group tests by files with automatic organization.
• Support for both single tests and test cases.
• Customizable color-coded output for better readability.
• Handles both success and error scenarios.
• Reports results per file and globally.

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Installation

Install WiTests as a dependency in your project:

npm install witests

Usage

1. Writing Tests

Create test files (e.g., example.test.js) in your designated tests folder. Use the define and defineTestCases functions to register your tests:

// example.test.js

define("Basic addition", () => 1 + 2, 3);

define(
  "Addition with nulls",
  () => {
    if (1 + null === null) throw new Error("Nulls cannot be summed");
  },
  { error: "Nulls cannot be summed" }
);

defineTestCases("Sum of numbers", (a, b) => a + b, {
  case1: { input: [1, 2], expected: 3 },
  case2: { input: [null, 2], expected: { error: "Nulls cannot be summed" } },
});

2. Running Tests

Run all tests in the specified folder (tests by default) or a single file using the CLI.

witests

Running a single test file

witests ./tests/example.test.js

3. Output Example

When you run the tests, WiTests will provide a detailed report:

Running WiTests...

Running tests from: example.test.js
Running test: Basic addition...
Test Basic addition passed! ✔️
Running test: Addition with nulls...
Test Addition with nulls passed! ✔️
Running test: Sum of numbers - case1...
Test Sum of numbers - case1 passed! ✔️
Running test: Sum of numbers - case2...
Test Sum of numbers - case2 passed! ✔️

All tests from example.test.js passed! 🎉
All tests passed globally! 🎉

API Reference

define(name, testFn, expected)

Define a single test.

• name (string): The name of the test.
• testFn (function): The test function to execute.
• expected (any): The expected result. Use { error: "Error message" } for error tests.

defineTestCases(name, testFn, cases)

Define multiple tests from a collection of cases.

• name (string): The base name for the tests.
• testFn (function): The test function to execute.
• cases (object): An object where keys are case names and values contain:
  • input (array): The input arguments for the test function.
  • expected (any): The expected result.

witestsRunner.run()

Runs all registered tests, grouping results by file.

Customization

Colors

You can customize the output colors by passing an options object when creating the runner:

const witestsRunner = new WitestsRunner({
  colors: {
    success: "\x1b[32m",
    failure: "\x1b[31m",
    title: "\x1b[35m",
    reset: "\x1b[0m",
  },
});

License

MIT License. See LICENSE for details.