node-assertthat

node-assertthat provides a fluent TDD style for Node.js: assert.that(actual, is.equalTo(expected));

node-assertthat

node-assertthat provides a fluent TDD style for Node.js: assert.that(actual, is.equalTo(expected));

$ npm install node-assertthat

Using node-assertthat is easy. All you need to do is to add a reference to it within your Node.js application:

var assert = require('node-assertthat');

Now you are able to use the various constraints:

var add = function(firstsecond) {
  return first + second;
};
 
var actual = add(23, 42),
    expected = 65;
 
assert.that(actual, is.equalTo(expected));

Please note that node-assertthat extends Node's assert module, i.e. all the code you have been used to will work with node-assertthat as well.

Please note that any constraint can be negated using the not keyword.

Asserts that actual is greater than or equal to expected.

assert.that(actual, is.atLeast(expected));
assert.that(actual, is.not.atLeast(expected));

Asserts that actual is less than or equal to expected.

assert.that(actual, is.atMost(expected));
assert.that(actual, is.not.atMost(expected));

Asserts that actual is between expectedLow and expectedHigh.

assert.that(actual, is.between(expectedLow, expectedHigh));
assert.that(actual, is.not.between(expectedLow, expectedHigh));

Asserts that actual is equal to expected.

assert.that(actual, is.equalTo(expected));
assert.that(actual, is.not.equalTo(expected));

Asserts that actual is false.

assert.that(actual, is.false());
assert.that(actual, is.not.false());

Asserts that actual is falsy.

assert.that(actual, is.falsy());
assert.that(actual, is.not.falsy());

Asserts that actual is greater than expected.

assert.that(actual, is.greaterThan(expected));
assert.that(actual, is.not.greaterThan(expected));

Asserts that actual is an instance of expected.

assert.that(actual, is.instanceOf(expected));
assert.that(actual, is.not.instanceOf(expected));

Asserts that actual is less than expected.

assert.that(actual, is.lessThan(expected));
assert.that(actual, is.not.lessThan(expected));

Asserts that actual is NaN.

assert.that(actual, is.NaN());
assert.that(actual, is.not.NaN());

Asserts that actual is null.

assert.that(actual, is.null());
assert.that(actual, is.not.null());

Asserts that actual is of type expected.

assert.that(actual, is.ofType(expected));
assert.that(actual, is.not.ofType(expected));

Asserts that actual is identical to expected.

assert.that(actual, is.sameAs(expected));
assert.that(actual, is.not.sameAs(expected));

Asserts that f throws an exception.

assert.that(f, is.throwing());
assert.that(f, is.not.throwing());

Alternatively, asserts that f throws an exception with the expected message.

assert.that(f, is.throwing(expected));
assert.that(f, is.not.throwing(expected));

Asserts that actual is true.

assert.that(actual, is.true());
assert.that(actual, is.not.true());

Asserts that actual is undefined.

assert.that(actual, is.());
assert.that(actual, is.not.());

This module can be built using Grunt. Besides running the tests, this also analyses the code. To run Grunt, go to the folder where you have installed node-assertthat and run grunt. You need to have grunt-cli installed.

$ grunt

The MIT License (MIT) Copyright (c) 2011-2014 the native web.

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.