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/*!
* chai
* Copyright(c) 2011-2014 Jake Luer <jake@alogicalparadox.com>
* MIT Licensed
*/
module.exports = function (chai, util) {
var Assertion = chai.Assertion;
function loadShould () {
// explicitly define this method as function as to have it's name to include as `ssfi`
function shouldGetter() {
if (this instanceof String
|| this instanceof Number
|| this instanceof Boolean
|| typeof Symbol === 'function' && this instanceof Symbol) {
return new Assertion(this.valueOf(), null, shouldGetter);
}
return new Assertion(this, null, shouldGetter);
}
function shouldSetter(value) {
// See https://github.com/chaijs/chai/issues/86: this makes
// `whatever.should = someValue` actually set `someValue`, which is
// especially useful for `global.should = require('chai').should()`.
//
// Note that we have to use [[DefineProperty]] instead of [[Put]]
// since otherwise we would trigger this very setter!
Object.defineProperty(this, 'should', {
value: value,
enumerable: true,
configurable: true,
writable: true
});
}
// modify Object.prototype to have `should`
Object.defineProperty(Object.prototype, 'should', {
set: shouldSetter
, get: shouldGetter
, configurable: true
});
var should = {};
/**
* ### .fail([message])
* ### .fail(actual, expected, [message], [operator])
*
* Throw a failure.
*
* should.fail();
* should.fail("custom error message");
* should.fail(1, 2);
* should.fail(1, 2, "custom error message");
* should.fail(1, 2, "custom error message", ">");
* should.fail(1, 2, undefined, ">");
*
*
* @name fail
* @param {Mixed} actual
* @param {Mixed} expected
* @param {String} message
* @param {String} operator
* @namespace BDD
* @api public
*/
should.fail = function (actual, expected, message, operator) {
if (arguments.length < 2) {
message = actual;
actual = undefined;
}
message = message || 'should.fail()';
throw new chai.AssertionError(message, {
actual: actual
, expected: expected
, operator: operator
}, should.fail);
};
/**
* ### .equal(actual, expected, [message])
*
* Asserts non-strict equality (`==`) of `actual` and `expected`.
*
* should.equal(3, '3', '== coerces values to strings');
*
* @name equal
* @param {Mixed} actual
* @param {Mixed} expected
* @param {String} message
* @namespace Should
* @api public
*/
should.equal = function (val1, val2, msg) {
new Assertion(val1, msg).to.equal(val2);
};
/**
* ### .throw(function, [constructor/string/regexp], [string/regexp], [message])
*
* Asserts that `function` will throw an error that is an instance of
* `constructor`, or alternately that it will throw an error with message
* matching `regexp`.
*
* should.throw(fn, 'function throws a reference error');
* should.throw(fn, /function throws a reference error/);
* should.throw(fn, ReferenceError);
* should.throw(fn, ReferenceError, 'function throws a reference error');
* should.throw(fn, ReferenceError, /function throws a reference error/);
*
* @name throw
* @alias Throw
* @param {Function} function
* @param {ErrorConstructor} constructor
* @param {RegExp} regexp
* @param {String} message
* @see https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Error#Error_types
* @namespace Should
* @api public
*/
should.Throw = function (fn, errt, errs, msg) {
new Assertion(fn, msg).to.Throw(errt, errs);
};
/**
* ### .exist
*
* Asserts that the target is neither `null` nor `undefined`.
*
* var foo = 'hi';
*
* should.exist(foo, 'foo exists');
*
* @name exist
* @namespace Should
* @api public
*/
should.exist = function (val, msg) {
new Assertion(val, msg).to.exist;
}
// negation
should.not = {}
/**
* ### .not.equal(actual, expected, [message])
*
* Asserts non-strict inequality (`!=`) of `actual` and `expected`.
*
* should.not.equal(3, 4, 'these numbers are not equal');
*
* @name not.equal
* @param {Mixed} actual
* @param {Mixed} expected
* @param {String} message
* @namespace Should
* @api public
*/
should.not.equal = function (val1, val2, msg) {
new Assertion(val1, msg).to.not.equal(val2);
};
/**
* ### .throw(function, [constructor/regexp], [message])
*
* Asserts that `function` will _not_ throw an error that is an instance of
* `constructor`, or alternately that it will not throw an error with message
* matching `regexp`.
*
* should.not.throw(fn, Error, 'function does not throw');
*
* @name not.throw
* @alias not.Throw
* @param {Function} function
* @param {ErrorConstructor} constructor
* @param {RegExp} regexp
* @param {String} message
* @see https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Error#Error_types
* @namespace Should
* @api public
*/
should.not.Throw = function (fn, errt, errs, msg) {
new Assertion(fn, msg).to.not.Throw(errt, errs);
};
/**
* ### .not.exist
*
* Asserts that the target is neither `null` nor `undefined`.
*
* var bar = null;
*
* should.not.exist(bar, 'bar does not exist');
*
* @name not.exist
* @namespace Should
* @api public
*/
should.not.exist = function (val, msg) {
new Assertion(val, msg).to.not.exist;
}
should['throw'] = should['Throw'];
should.not['throw'] = should.not['Throw'];
return should;
};
chai.should = loadShould;
chai.Should = loadShould;
};
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