scar

Test runner for Node.js and the browser, extensively tested with mocha and itself. Basic assertion functions are included, but it should work fine with any assertion lib that throws and rejects. Supports async tests through Promise. Lightweight object inspection, unique IDs and function spies included.

Examples

Works fine with Node.js, Webpack+Babel and Browserify+Babel.

const {test, assert} = require('scar');

test('passing', () =>; {
    assert.equal(1, 1);
});

test('failing', () =>; {
    assert.equal(1, 2);
});

test.cli();

Might need additional polyfills for Promise, Object.assign and Array.prototype.every to work in older browsers.

<script src="scar.js"></script>
<script>
    var test = window.scar.test;
    var assert = window.scar.assert;

    test('passing', function () {
        assert.equal(1, 1);
    });

    test('failing', function () {
        assert.equal(1, 2);
    });

    test.cli();
</script>

CLI

scar - a test runner for node and the browser

Usage:
  node your-script.js [opt...] [arg...]
  your-url.html?opt&...&arg&...

Options:
  -h: show this help message

Arguments:
  all arguments are used as test filters

API

scar

const obj = require('scar')  // nodejs
var obj = window.scar        // browser

then obj is

{
    scar,    // factory
    test,    // preconstructed scar()
    assert,  // lightweight assertions
    insp,    // lightweight value inspection
    uniq,    // unique IDs and objects
    spy      // lightweight function spies
}

test

test(desc, fn, {skip, sync})  // args optional and in any order
test.skip(desc, fn, {sync})   // like {skip: true}
test.sync(desc, fn, {skip})   // like {sync: true}
test.run()                    // run all tests => Promise()
test.cli()                    // run CLI => Promise()

assert

assert(expr, msg)                     // !!expr === true
assert.fail(msg)
assert.ok(act, msg)                   // !!act === true
assert.not_ok(act, msg)               // !act === true
assert.equal(act, exp, msg)           // act === exp
assert.not_equal(act, ref, msg)       // act !== ref
assert.deep_equal(act, exp, msg)      // act === exp for all but Array and plain Object
assert.not_deep_equal(act, ref, msg)  // !deep_equal()
assert.throws(fn, exp, msg)
assert.rejects(thenable, exp, msg)    // => Promise

insp

insp(x)  // => string repr of x

uniq

uniq.id()       // => 'UNIQ-0007-ID'
uniq.is_id(x)   // => x matches 'UNIQ-xxxx-ID'
uniq.obj()      // => {_uniq_id: 'UNIQ-0013-ID'}
uniq.path(ext)  // => '_uniq_path/UNIQ-0021-ID.ext'

spy

spy([fn])  // => spy function, with optional call handler 'fn(call, calls)'

Example usage:

const a_spy_fn = spy(() => 42);
a_spy_fn.calls        // => []
a_spy_fn(11, 22, 33)  // => 42
a_spy_fn.calls[0]     // => {idx: 0, ctx: undefined, args: [11, 22, 33], ret: 42, time: ..., done: ...}

License

The MIT License (MIT)

Copyright (c) 2024 Lars Jung (https://larsjung.de)

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.