/*!
* chai
* Copyright(c) 2011-2014 Jake Luer <jake@alogicalparadox.com>
* MIT Licensed
*/
module.exports = function (chai, util) {
/*!
* Chai dependencies.
*/
var Assertion = chai.Assertion
, flag = util.flag;
/*!
* Module export.
*/
/**
* ### assert(expression, message)
*
* Write your own test expressions.
*
* assert('foo' !== 'bar', 'foo is not bar');
* assert(Array.isArray([]), 'empty arrays are arrays');
*
* @param {Mixed} expression to test for truthiness
* @param {String} message to display on error
* @name assert
* @namespace Assert
* @api public
*/
var assert = chai.assert = function (express, errmsg) {
var test = new Assertion(null, null, chai.assert);
test.assert(
express
, errmsg
, '[ negation message unavailable ]'
);
};
/**
* ### .fail(actual, expected, [message], [operator])
*
* Throw a failure. Node.js `assert` module-compatible.
*
* @name fail
* @param {Mixed} actual
* @param {Mixed} expected
* @param {String} message
* @param {String} operator
* @namespace Assert
* @api public
*/
assert.fail = function (actual, expected, message, operator) {
message = message || 'assert.fail()';
throw new chai.AssertionError(message, {
actual: actual
, expected: expected
, operator: operator
}, assert.fail);
};
/**
* ### .isOk(object, [message])
*
* Asserts that `object` is truthy.
*
* assert.isOk('everything', 'everything is ok');
* assert.isOk(false, 'this will fail');
*
* @name isOk
* @alias ok
* @param {Mixed} object to test
* @param {String} message
* @namespace Assert
* @api public
*/
assert.isOk = function (val, msg) {
new Assertion(val, msg).is.ok;
};
/**
* ### .isNotOk(object, [message])
*
* Asserts that `object` is falsy.
*
* assert.isNotOk('everything', 'this will fail');
* assert.isNotOk(false, 'this will pass');
*
* @name isNotOk
* @alias notOk
* @param {Mixed} object to test
* @param {String} message
* @namespace Assert
* @api public
*/
assert.isNotOk = function (val, msg) {
new Assertion(val, msg).is.not.ok;
};
/**
* ### .equal(actual, expected, [message])
*
* Asserts non-strict equality (`==`) of `actual` and `expected`.
*
* assert.equal(3, '3', '== coerces values to strings');
*
* @name equal
* @param {Mixed} actual
* @param {Mixed} expected
* @param {String} message
* @namespace Assert
* @api public
*/
assert.equal = function (act, exp, msg) {
var test = new Assertion(act, msg, assert.equal);
test.assert(
exp == flag(test, 'object')
, 'expected #{this} to equal #{exp}'
, 'expected #{this} to not equal #{act}'
, exp
, act
);
};
/**
* ### .notEqual(actual, expected, [message])
*
* Asserts non-strict inequality (`!=`) of `actual` and `expected`.
*
* assert.notEqual(3, 4, 'these numbers are not equal');
*
* @name notEqual
* @param {Mixed} actual
* @param {Mixed} expected
* @param {String} message
* @namespace Assert
* @api public
*/
assert.notEqual = function (act, exp, msg) {
var test = new Assertion(act, msg, assert.notEqual);
test.assert(
exp != flag(test, 'object')
, 'expected #{this} to not equal #{exp}'
, 'expected #{this} to equal #{act}'
, exp
, act
);
};
/**
* ### .strictEqual(actual, expected, [message])
*
* Asserts strict equality (`===`) of `actual` and `expected`.
*
* assert.strictEqual(true, true, 'these booleans are strictly equal');
*
* @name strictEqual
* @param {Mixed} actual
* @param {Mixed} expected
* @param {String} message
* @namespace Assert
* @api public
*/
assert.strictEqual = function (act, exp, msg) {
new Assertion(act, msg).to.equal(exp);
};
/**
* ### .notStrictEqual(actual, expected, [message])
*
* Asserts strict inequality (`!==`) of `actual` and `expected`.
*
* assert.notStrictEqual(3, '3', 'no coercion for strict equality');
*
* @name notStrictEqual
* @param {Mixed} actual
* @param {Mixed} expected
* @param {String} message
* @namespace Assert
* @api public
*/
assert.notStrictEqual = function (act, exp, msg) {
new Assertion(act, msg).to.not.equal(exp);
};
/**
* ### .deepEqual(actual, expected, [message])
*
* Asserts that `actual` is deeply equal to `expected`.
*
* assert.deepEqual({ tea: 'green' }, { tea: 'green' });
*
* @name deepEqual
* @param {Mixed} actual
* @param {Mixed} expected
* @param {String} message
* @namespace Assert
* @api public
*/
assert.deepEqual = function (act, exp, msg) {
new Assertion(act, msg).to.eql(exp);
};
/**
* ### .notDeepEqual(actual, expected, [message])
*
* Assert that `actual` is not deeply equal to `expected`.
*
* assert.notDeepEqual({ tea: 'green' }, { tea: 'jasmine' });
*
* @name notDeepEqual
* @param {Mixed} actual
* @param {Mixed} expected
* @param {String} message
* @namespace Assert
* @api public
*/
assert.notDeepEqual = function (act, exp, msg) {
new Assertion(act, msg).to.not.eql(exp);
};
/**
* ### .isAbove(valueToCheck, valueToBeAbove, [message])
*
* Asserts `valueToCheck` is strictly greater than (>) `valueToBeAbove`
*
* assert.isAbove(5, 2, '5 is strictly greater than 2');
*
* @name isAbove
* @param {Mixed} valueToCheck
* @param {Mixed} valueToBeAbove
* @param {String} message
* @namespace Assert
* @api public
*/
assert.isAbove = function (val, abv, msg) {
new Assertion(val, msg).to.be.above(abv);
};
/**
* ### .isAtLeast(valueToCheck, valueToBeAtLeast, [message])
*
* Asserts `valueToCheck` is greater than or equal to (>=) `valueToBeAtLeast`
*
* assert.isAtLeast(5, 2, '5 is greater or equal to 2');
* assert.isAtLeast(3, 3, '3 is greater or equal to 3');
*
* @name isAtLeast
* @param {Mixed} valueToCheck
* @param {Mixed} valueToBeAtLeast
* @param {String} message
* @namespace Assert
* @api public
*/
assert.isAtLeast = function (val, atlst, msg) {
new Assertion(val, msg).to.be.least(atlst);
};
/**
* ### .isBelow(valueToCheck, valueToBeBelow, [message])
*
* Asserts `valueToCheck` is strictly less than (<) `valueToBeBelow`
*
* assert.isBelow(3, 6, '3 is strictly less than 6');
*
* @name isBelow
* @param {Mixed} valueToCheck
* @param {Mixed} valueToBeBelow
* @param {String} message
* @namespace Assert
* @api public
*/
assert.isBelow = function (val, blw, msg) {
new Assertion(val, msg).to.be.below(blw);
};
/**
* ### .isAtMost(valueToCheck, valueToBeAtMost, [message])
*
* Asserts `valueToCheck` is less than or equal to (<=) `valueToBeAtMost`
*
* assert.isAtMost(3, 6, '3 is less than or equal to 6');
* assert.isAtMost(4, 4, '4 is less than or equal to 4');
*
* @name isAtMost
* @param {Mixed} valueToCheck
* @param {Mixed} valueToBeAtMost
* @param {String} message
* @namespace Assert
* @api public
*/
assert.isAtMost = function (val, atmst, msg) {
new Assertion(val, msg).to.be.most(atmst);
};
/**
* ### .isTrue(value, [message])
*
* Asserts that `value` is true.
*
* var teaServed = true;
* assert.isTrue(teaServed, 'the tea has been served');
*
* @name isTrue
* @param {Mixed} value
* @param {String} message
* @namespace Assert
* @api public
*/
assert.isTrue = function (val, msg) {
new Assertion(val, msg).is['true'];
};
/**
* ### .isNotTrue(value, [message])
*
* Asserts that `value` is not true.
*
* var tea = 'tasty chai';
* assert.isNotTrue(tea, 'great, time for tea!');
*
* @name isNotTrue
* @param {Mixed} value
* @param {String} message
* @namespace Assert
* @api public
*/
assert.isNotTrue = function (val, msg) {
new Assertion(val, msg).to.not.equal(true);
};
/**
* ### .isFalse(value, [message])
*
* Asserts that `value` is false.
*
* var teaServed = false;
* assert.isFalse(teaServed, 'no tea yet? hmm...');
*
* @name isFalse
* @param {Mixed} value
* @param {String} message
* @namespace Assert
* @api public
*/
assert.isFalse = function (val, msg) {
new Assertion(val, msg).is['false'];
};
/**
* ### .isNotFalse(value, [message])
*
* Asserts that `value` is not false.
*
* var tea = 'tasty chai';
* assert.isNotFalse(tea, 'great, time for tea!');
*
* @name isNotFalse
* @param {Mixed} value
* @param {String} message
* @namespace Assert
* @api public
*/
assert.isNotFalse = function (val, msg) {
new Assertion(val, msg).to.not.equal(false);
};
/**
* ### .isNull(value, [message])
*
* Asserts that `value` is null.
*
* assert.isNull(err, 'there was no error');
*
* @name isNull
* @param {Mixed} value
* @param {String} message
* @namespace Assert
* @api public
*/
assert.isNull = function (val, msg) {
new Assertion(val, msg).to.equal(null);
};
/**
* ### .isNotNull(value, [message])
*
* Asserts that `value` is not null.
*
* var tea = 'tasty chai';
* assert.isNotNull(tea, 'great, time for tea!');
*
* @name isNotNull
* @param {Mixed} value
* @param {String} message
* @namespace Assert
* @api public
*/
assert.isNotNull = function (val, msg) {
new Assertion(val, msg).to.not.equal(null);
};
/**
* ### .isNaN
* Asserts that value is NaN
*
* assert.isNaN('foo', 'foo is NaN');
*
* @name isNaN
* @param {Mixed} value
* @param {String} message
* @namespace Assert
* @api public
*/
assert.isNaN = function (val, msg) {
new Assertion(val, msg).to.be.NaN;
};
/**
* ### .isNotNaN
* Asserts that value is not NaN
*
* assert.isNotNaN(4, '4 is not NaN');
*
* @name isNotNaN
* @param {Mixed} value
* @param {String} message
* @namespace Assert
* @api public
*/
assert.isNotNaN = function (val, msg) {
new Assertion(val, msg).not.to.be.NaN;
};
/**
* ### .isUndefined(value, [message])
*
* Asserts that `value` is `undefined`.
*
* var tea;
* assert.isUndefined(tea, 'no tea defined');
*
* @name isUndefined
* @param {Mixed} value
* @param {String} message
* @namespace Assert
* @api public
*/
assert.isUndefined = function (val, msg) {
new Assertion(val, msg).to.equal(undefined);
};
/**
* ### .isDefined(value, [message])
*
* Asserts that `value` is not `undefined`.
*
* var tea = 'cup of chai';
* assert.isDefined(tea, 'tea has been defined');
*
* @name isDefined
* @param {Mixed} value
* @param {String} message
* @namespace Assert
* @api public
*/
assert.isDefined = function (val, msg) {
new Assertion(val, msg).to.not.equal(undefined);
};
/**
* ### .isFunction(value, [message])
*
* Asserts that `value` is a function.
*
* function serveTea() { return 'cup of tea'; };
* assert.isFunction(serveTea, 'great, we can have tea now');
*
* @name isFunction
* @param {Mixed} value
* @param {String} message
* @namespace Assert
* @api public
*/
assert.isFunction = function (val, msg) {
new Assertion(val, msg).to.be.a('function');
};
/**
* ### .isNotFunction(value, [message])
*
* Asserts that `value` is _not_ a function.
*
* var serveTea = [ 'heat', 'pour', 'sip' ];
* assert.isNotFunction(serveTea, 'great, we have listed the steps');
*
* @name isNotFunction
* @param {Mixed} value
* @param {String} message
* @namespace Assert
* @api public
*/
assert.isNotFunction = function (val, msg) {
new Assertion(val, msg).to.not.be.a('function');
};
/**
* ### .isObject(value, [message])
*
* Asserts that `value` is an object of type 'Object' (as revealed by `Object.prototype.toString`).
* _The assertion does not match subclassed objects._
*
* var selection = { name: 'Chai', serve: 'with spices' };
* assert.isObject(selection, 'tea selection is an object');
*
* @name isObject
* @param {Mixed} value
* @param {String} message
* @namespace Assert
* @api public
*/
assert.isObject = function (val, msg) {
new Assertion(val, msg).to.be.a('object');
};
/**
* ### .isNotObject(value, [message])
*
* Asserts that `value` is _not_ an object of type 'Object' (as revealed by `Object.prototype.toString`).
*
* var selection = 'chai'
* assert.isNotObject(selection, 'tea selection is not an object');
* assert.isNotObject(null, 'null is not an object');
*
* @name isNotObject
* @param {Mixed} value
* @param {String} message
* @namespace Assert
* @api public
*/
assert.isNotObject = function (val, msg) {
new Assertion(val, msg).to.not.be.a('object');
};
/**
* ### .isArray(value, [message])
*
* Asserts that `value` is an array.
*
* var menu = [ 'green', 'chai', 'oolong' ];
* assert.isArray(menu, 'what kind of tea do we want?');
*
* @name isArray
* @param {Mixed} value
* @param {String} message
* @namespace Assert
* @api public
*/
assert.isArray = function (val, msg) {
new Assertion(val, msg).to.be.an('array');
};
/**
* ### .isNotArray(value, [message])
*
* Asserts that `value` is _not_ an array.
*
* var menu = 'green|chai|oolong';
* assert.isNotArray(menu, 'what kind of tea do we want?');
*
* @name isNotArray
* @param {Mixed} value
* @param {String} message
* @namespace Assert
* @api public
*/
assert.isNotArray = function (val, msg) {
new Assertion(val, msg).to.not.be.an('array');
};
/**
* ### .isString(value, [message])
*
* Asserts that `value` is a string.
*
* var teaOrder = 'chai';
* assert.isString(teaOrder, 'order placed');
*
* @name isString
* @param {Mixed} value
* @param {String} message
* @namespace Assert
* @api public
*/
assert.isString = function (val, msg) {
new Assertion(val, msg).to.be.a('string');
};
/**
* ### .isNotString(value, [message])
*
* Asserts that `value` is _not_ a string.
*
* var teaOrder = 4;
* assert.isNotString(teaOrder, 'order placed');
*
* @name isNotString
* @param {Mixed} value
* @param {String} message
* @namespace Assert
* @api public
*/
assert.isNotString = function (val, msg) {
new Assertion(val, msg).to.not.be.a('string');
};
/**
* ### .isNumber(value, [message])
*
* Asserts that `value` is a number.
*
* var cups = 2;
* assert.isNumber(cups, 'how many cups');
*
* @name isNumber
* @param {Number} value
* @param {String} message
* @namespace Assert
* @api public
*/
assert.isNumber = function (val, msg) {
new Assertion(val, msg).to.be.a('number');
};
/**
* ### .isNotNumber(value, [message])
*
* Asserts that `value` is _not_ a number.
*
* var cups = '2 cups please';
* assert.isNotNumber(cups, 'how many cups');
*
* @name isNotNumber
* @param {Mixed} value
* @param {String} message
* @namespace Assert
* @api public
*/
assert.isNotNumber = function (val, msg) {
new Assertion(val, msg).to.not.be.a('number');
};
/**
* ### .isBoolean(value, [message])
*
* Asserts that `value` is a boolean.
*
* var teaReady = true
* , teaServed = false;
*
* assert.isBoolean(teaReady, 'is the tea ready');
* assert.isBoolean(teaServed, 'has tea been served');
*
* @name isBoolean
* @param {Mixed} value
* @param {String} message
* @namespace Assert
* @api public
*/
assert.isBoolean = function (val, msg) {
new Assertion(val, msg).to.be.a('boolean');
};
/**
* ### .isNotBoolean(value, [message])
*
* Asserts that `value` is _not_ a boolean.
*
* var teaReady = 'yep'
* , teaServed = 'nope';
*
* assert.isNotBoolean(teaReady, 'is the tea ready');
* assert.isNotBoolean(teaServed, 'has tea been served');
*
* @name isNotBoolean
* @param {Mixed} value
* @param {String} message
* @namespace Assert
* @api public
*/
assert.isNotBoolean = function (val, msg) {
new Assertion(val, msg).to.not.be.a('boolean');
};
/**
* ### .typeOf(value, name, [message])
*
* Asserts that `value`'s type is `name`, as determined by
* `Object.prototype.toString`.
*
* assert.typeOf({ tea: 'chai' }, 'object', 'we have an object');
* assert.typeOf(['chai', 'jasmine'], 'array', 'we have an array');
* assert.typeOf('tea', 'string', 'we have a string');
* assert.typeOf(/tea/, 'regexp', 'we have a regular expression');
* assert.typeOf(null, 'null', 'we have a null');
* assert.typeOf(undefined, 'undefined', 'we have an undefined');
*
* @name typeOf
* @param {Mixed} value
* @param {String} name
* @param {String} message
* @namespace Assert
* @api public
*/
assert.typeOf = function (val, type, msg) {
new Assertion(val, msg).to.be.a(type);
};
/**
* ### .notTypeOf(value, name, [message])
*
* Asserts that `value`'s type is _not_ `name`, as determined by
* `Object.prototype.toString`.
*
* assert.notTypeOf('tea', 'number', 'strings are not numbers');
*
* @name notTypeOf
* @param {Mixed} value
* @param {String} typeof name
* @param {String} message
* @namespace Assert
* @api public
*/
assert.notTypeOf = function (val, type, msg) {
new Assertion(val, msg).to.not.be.a(type);
};
/**
* ### .instanceOf(object, constructor, [message])
*
* Asserts that `value` is an instance of `constructor`.
*
* var Tea = function (name) { this.name = name; }
* , chai = new Tea('chai');
*
* assert.instanceOf(chai, Tea, 'chai is an instance of tea');
*
* @name instanceOf
* @param {Object} object
* @param {Constructor} constructor
* @param {String} message
* @namespace Assert
* @api public
*/
assert.instanceOf = function (val, type, msg) {
new Assertion(val, msg).to.be.instanceOf(type);
};
/**
* ### .notInstanceOf(object, constructor, [message])
*
* Asserts `value` is not an instance of `constructor`.
*
* var Tea = function (name) { this.name = name; }
* , chai = new String('chai');
*
* assert.notInstanceOf(chai, Tea, 'chai is not an instance of tea');
*
* @name notInstanceOf
* @param {Object} object
* @param {Constructor} constructor
* @param {String} message
* @namespace Assert
* @api public
*/
assert.notInstanceOf = function (val, type, msg) {
new Assertion(val, msg).to.not.be.instanceOf(type);
};
/**
* ### .include(haystack, needle, [message])
*
* Asserts that `haystack` includes `needle`. Works
* for strings and arrays.
*
* assert.include('foobar', 'bar', 'foobar contains string "bar"');
* assert.include([ 1, 2, 3 ], 3, 'array contains value');
*
* @name include
* @param {Array|String} haystack
* @param {Mixed} needle
* @param {String} message
* @namespace Assert
* @api public
*/
assert.include = function (exp, inc, msg) {
new Assertion(exp, msg, assert.include).include(inc);
};
/**
* ### .notInclude(haystack, needle, [message])
*
* Asserts that `haystack` does not include `needle`. Works
* for strings and arrays.
*
* assert.notInclude('foobar', 'baz', 'string not include substring');
* assert.notInclude([ 1, 2, 3 ], 4, 'array not include contain value');
*
* @name notInclude
* @param {Array|String} haystack
* @param {Mixed} needle
* @param {String} message
* @namespace Assert
* @api public
*/
assert.notInclude = function (exp, inc, msg) {
new Assertion(exp, msg, assert.notInclude).not.include(inc);
};
/**
* ### .match(value, regexp, [message])
*
* Asserts that `value` matches the regular expression `regexp`.
*
* assert.match('foobar', /^foo/, 'regexp matches');
*
* @name match
* @param {Mixed} value
* @param {RegExp} regexp
* @param {String} message
* @namespace Assert
* @api public
*/
assert.match = function (exp, re, msg) {
new Assertion(exp, msg).to.match(re);
};
/**
* ### .notMatch(value, regexp, [message])
*
* Asserts that `value` does not match the regular expression `regexp`.
*
* assert.notMatch('foobar', /^foo/, 'regexp does not match');
*
* @name notMatch
* @param {Mixed} value
* @param {RegExp} regexp
* @param {String} message
* @namespace Assert
* @api public
*/
assert.notMatch = function (exp, re, msg) {
new Assertion(exp, msg).to.not.match(re);
};
/**
* ### .property(object, property, [message])
*
* Asserts that `object` has a property named by `property`.
*
* assert.property({ tea: { green: 'matcha' }}, 'tea');
*
* @name property
* @param {Object} object
* @param {String} property
* @param {String} message
* @namespace Assert
* @api public
*/
assert.property = function (obj, prop, msg) {
new Assertion(obj, msg).to.have.property(prop);
};
/**
* ### .notProperty(object, property, [message])
*
* Asserts that `object` does _not_ have a property named by `property`.
*
* assert.notProperty({ tea: { green: 'matcha' }}, 'coffee');
*
* @name notProperty
* @param {Object} object
* @param {String} property
* @param {String} message
* @namespace Assert
* @api public
*/
assert.notProperty = function (obj, prop, msg) {
new Assertion(obj, msg).to.not.have.property(prop);
};
/**
* ### .deepProperty(object, property, [message])
*
* Asserts that `object` has a property named by `property`, which can be a
* string using dot- and bracket-notation for deep reference.
*
* assert.deepProperty({ tea: { green: 'matcha' }}, 'tea.green');
*
* @name deepProperty
* @param {Object} object
* @param {String} property
* @param {String} message
* @namespace Assert
* @api public
*/
assert.deepProperty = function (obj, prop, msg) {
new Assertion(obj, msg).to.have.deep.property(prop);
};
/**
* ### .notDeepProperty(object, property, [message])
*
* Asserts that `object` does _not_ have a property named by `property`, which
* can be a string using dot- and bracket-notation for deep reference.
*
* assert.notDeepProperty({ tea: { green: 'matcha' }}, 'tea.oolong');
*
* @name notDeepProperty
* @param {Object} object
* @param {String} property
* @param {String} message
* @namespace Assert
* @api public
*/
assert.notDeepProperty = function (obj, prop, msg) {
new Assertion(obj, msg).to.not.have.deep.property(prop);
};
/**
* ### .propertyVal(object, property, value, [message])
*
* Asserts that `object` has a property named by `property` with value given
* by `value`.
*
* assert.propertyVal({ tea: 'is good' }, 'tea', 'is good');
*
* @name propertyVal
* @param {Object} object
* @param {String} property
* @param {Mixed} value
* @param {String} message
* @namespace Assert
* @api public
*/
assert.propertyVal = function (obj, prop, val, msg) {
new Assertion(obj, msg).to.have.property(prop, val);
};
/**
* ### .propertyNotVal(object, property, value, [message])
*
* Asserts that `object` has a property named by `property`, but with a value
* different from that given by `value`.
*
* assert.propertyNotVal({ tea: 'is good' }, 'tea', 'is bad');
*
* @name propertyNotVal
* @param {Object} object
* @param {String} property
* @param {Mixed} value
* @param {String} message
* @namespace Assert
* @api public
*/
assert.propertyNotVal = function (obj, prop, val, msg) {
new Assertion(obj, msg).to.not.have.property(prop, val);
};
/**
* ### .deepPropertyVal(object, property, value, [message])
*
* Asserts that `object` has a property named by `property` with value given
* by `value`. `property` can use dot- and bracket-notation for deep
* reference.
*
* assert.deepPropertyVal({ tea: { green: 'matcha' }}, 'tea.green', 'matcha');
*
* @name deepPropertyVal
* @param {Object} object
* @param {String} property
* @param {Mixed} value
* @param {String} message
* @namespace Assert
* @api public
*/
assert.deepPropertyVal = function (obj, prop, val, msg) {
new Assertion(obj, msg).to.have.deep.property(prop, val);
};
/**
* ### .deepPropertyNotVal(object, property, value, [message])
*
* Asserts that `object` has a property named by `property`, but with a value
* different from that given by `value`. `property` can use dot- and
* bracket-notation for deep reference.
*
* assert.deepPropertyNotVal({ tea: { green: 'matcha' }}, 'tea.green', 'konacha');
*
* @name deepPropertyNotVal
* @param {Object} object
* @param {String} property
* @param {Mixed} value
* @param {String} message
* @namespace Assert
* @api public
*/
assert.deepPropertyNotVal = function (obj, prop, val, msg) {
new Assertion(obj, msg).to.not.have.deep.property(prop, val);
};
/**
* ### .lengthOf(object, length, [message])
*
* Asserts that `object` has a `length` property with the expected value.
*
* assert.lengthOf([1,2,3], 3, 'array has length of 3');
* assert.lengthOf('foobar', 6, 'string has length of 6');
*
* @name lengthOf
* @param {Mixed} object
* @param {Number} length
* @param {String} message
* @namespace Assert
* @api public
*/
assert.lengthOf = function (exp, len, msg) {
new Assertion(exp, msg).to.have.length(len);
};
/**
* ### .throws(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`.
*
* assert.throws(fn, 'function throws a reference error');
* assert.throws(fn, /function throws a reference error/);
* assert.throws(fn, ReferenceError);
* assert.throws(fn, ReferenceError, 'function throws a reference error');
* assert.throws(fn, ReferenceError, /function throws a reference error/);
*
* @name throws
* @alias 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 Assert
* @api public
*/
assert.throws = function (fn, errt, errs, msg) {
if ('string' === typeof errt || errt instanceof RegExp) {
errs = errt;
errt = null;
}
var assertErr = new Assertion(fn, msg).to.throw(errt, errs);
return flag(assertErr, 'object');
};
/**
* ### .doesNotThrow(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`.
*
* assert.doesNotThrow(fn, Error, 'function does not throw');
*
* @name doesNotThrow
* @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 Assert
* @api public
*/
assert.doesNotThrow = function (fn, type, msg) {
if ('string' === typeof type) {
msg = type;
type = null;
}
new Assertion(fn, msg).to.not.Throw(type);
};
/**
* ### .operator(val1, operator, val2, [message])
*
* Compares two values using `operator`.
*
* assert.operator(1, '<', 2, 'everything is ok');
* assert.operator(1, '>', 2, 'this will fail');
*
* @name operator
* @param {Mixed} val1
* @param {String} operator
* @param {Mixed} val2
* @param {String} message
* @namespace Assert
* @api public
*/
assert.operator = function (val, operator, val2, msg) {
var ok;
switch(operator) {
case '==':
ok = val == val2;
break;
case '===':
ok = val === val2;
break;
case '>':
ok = val > val2;
break;
case '>=':
ok = val >= val2;
break;
case '<':
ok = val < val2;
break;
case '<=':
ok = val <= val2;
break;
case '!=':
ok = val != val2;
break;
case '!==':
ok = val !== val2;
break;
default:
throw new Error('Invalid operator "' + operator + '"');
}
var test = new Assertion(ok, msg);
test.assert(
true === flag(test, 'object')
, 'expected ' + util.inspect(val) + ' to be ' + operator + ' ' + util.inspect(val2)
, 'expected ' + util.inspect(val) + ' to not be ' + operator + ' ' + util.inspect(val2) );
};
/**
* ### .closeTo(actual, expected, delta, [message])
*
* Asserts that the target is equal `expected`, to within a +/- `delta` range.
*
* assert.closeTo(1.5, 1, 0.5, 'numbers are close');
*
* @name closeTo
* @param {Number} actual
* @param {Number} expected
* @param {Number} delta
* @param {String} message
* @namespace Assert
* @api public
*/
assert.closeTo = function (act, exp, delta, msg) {
new Assertion(act, msg).to.be.closeTo(exp, delta);
};
/**
* ### .approximately(actual, expected, delta, [message])
*
* Asserts that the target is equal `expected`, to within a +/- `delta` range.
*
* assert.approximately(1.5, 1, 0.5, 'numbers are close');
*
* @name approximately
* @param {Number} actual
* @param {Number} expected
* @param {Number} delta
* @param {String} message
* @namespace Assert
* @api public
*/
assert.approximately = function (act, exp, delta, msg) {
new Assertion(act, msg).to.be.approximately(exp, delta);
};
/**
* ### .sameMembers(set1, set2, [message])
*
* Asserts that `set1` and `set2` have the same members.
* Order is not taken into account.
*
* assert.sameMembers([ 1, 2, 3 ], [ 2, 1, 3 ], 'same members');
*
* @name sameMembers
* @param {Array} set1
* @param {Array} set2
* @param {String} message
* @namespace Assert
* @api public
*/
assert.sameMembers = function (set1, set2, msg) {
new Assertion(set1, msg).to.have.same.members(set2);
}
/**
* ### .sameDeepMembers(set1, set2, [message])
*
* Asserts that `set1` and `set2` have the same members - using a deep equality checking.
* Order is not taken into account.
*
* assert.sameDeepMembers([ {b: 3}, {a: 2}, {c: 5} ], [ {c: 5}, {b: 3}, {a: 2} ], 'same deep members');
*
* @name sameDeepMembers
* @param {Array} set1
* @param {Array} set2
* @param {String} message
* @namespace Assert
* @api public
*/
assert.sameDeepMembers = function (set1, set2, msg) {
new Assertion(set1, msg).to.have.same.deep.members(set2);
}
/**
* ### .includeMembers(superset, subset, [message])
*
* Asserts that `subset` is included in `superset`.
* Order is not taken into account.
*
* assert.includeMembers([ 1, 2, 3 ], [ 2, 1 ], 'include members');
*
* @name includeMembers
* @param {Array} superset
* @param {Array} subset
* @param {String} message
* @namespace Assert
* @api public
*/
assert.includeMembers = function (superset, subset, msg) {
new Assertion(superset, msg).to.include.members(subset);
}
/**
* ### .includeDeepMembers(superset, subset, [message])
*
* Asserts that `subset` is included in `superset` - using deep equality checking.
* Order is not taken into account.
* Duplicates are ignored.
*
* assert.includeDeepMembers([ {a: 1}, {b: 2}, {c: 3} ], [ {b: 2}, {a: 1}, {b: 2} ], 'include deep members');
*
* @name includeDeepMembers
* @param {Array} superset
* @param {Array} subset
* @param {String} message
* @namespace Assert
* @api public
*/
assert.includeDeepMembers = function (superset, subset, msg) {
new Assertion(superset, msg).to.include.deep.members(subset);
}
/**
* ### .oneOf(inList, list, [message])
*
* Asserts that non-object, non-array value `inList` appears in the flat array `list`.
*
* assert.oneOf(1, [ 2, 1 ], 'Not found in list');
*
* @name oneOf
* @param {*} inList
* @param {Array<*>} list
* @param {String} message
* @namespace Assert
* @api public
*/
assert.oneOf = function (inList, list, msg) {
new Assertion(inList, msg).to.be.oneOf(list);
}
/**
* ### .changes(function, object, property)
*
* Asserts that a function changes the value of a property
*
* var obj = { val: 10 };
* var fn = function() { obj.val = 22 };
* assert.changes(fn, obj, 'val');
*
* @name changes
* @param {Function} modifier function
* @param {Object} object
* @param {String} property name
* @param {String} message _optional_
* @namespace Assert
* @api public
*/
assert.changes = function (fn, obj, prop) {
new Assertion(fn).to.change(obj, prop);
}
/**
* ### .doesNotChange(function, object, property)
*
* Asserts that a function does not changes the value of a property
*
* var obj = { val: 10 };
* var fn = function() { console.log('foo'); };
* assert.doesNotChange(fn, obj, 'val');
*
* @name doesNotChange
* @param {Function} modifier function
* @param {Object} object
* @param {String} property name
* @param {String} message _optional_
* @namespace Assert
* @api public
*/
assert.doesNotChange = function (fn, obj, prop) {
new Assertion(fn).to.not.change(obj, prop);
}
/**
* ### .increases(function, object, property)
*
* Asserts that a function increases an object property
*
* var obj = { val: 10 };
* var fn = function() { obj.val = 13 };
* assert.increases(fn, obj, 'val');
*
* @name increases
* @param {Function} modifier function
* @param {Object} object
* @param {String} property name
* @param {String} message _optional_
* @namespace Assert
* @api public
*/
assert.increases = function (fn, obj, prop) {
new Assertion(fn).to.increase(obj, prop);
}
/**
* ### .doesNotIncrease(function, object, property)
*
* Asserts that a function does not increase object property
*
* var obj = { val: 10 };
* var fn = function() { obj.val = 8 };
* assert.doesNotIncrease(fn, obj, 'val');
*
* @name doesNotIncrease
* @param {Function} modifier function
* @param {Object} object
* @param {String} property name
* @param {String} message _optional_
* @namespace Assert
* @api public
*/
assert.doesNotIncrease = function (fn, obj, prop) {
new Assertion(fn).to.not.increase(obj, prop);
}
/**
* ### .decreases(function, object, property)
*
* Asserts that a function decreases an object property
*
* var obj = { val: 10 };
* var fn = function() { obj.val = 5 };
* assert.decreases(fn, obj, 'val');
*
* @name decreases
* @param {Function} modifier function
* @param {Object} object
* @param {String} property name
* @param {String} message _optional_
* @namespace Assert
* @api public
*/
assert.decreases = function (fn, obj, prop) {
new Assertion(fn).to.decrease(obj, prop);
}
/**
* ### .doesNotDecrease(function, object, property)
*
* Asserts that a function does not decreases an object property
*
* var obj = { val: 10 };
* var fn = function() { obj.val = 15 };
* assert.doesNotDecrease(fn, obj, 'val');
*
* @name doesNotDecrease
* @param {Function} modifier function
* @param {Object} object
* @param {String} property name
* @param {String} message _optional_
* @namespace Assert
* @api public
*/
assert.doesNotDecrease = function (fn, obj, prop) {
new Assertion(fn).to.not.decrease(obj, prop);
}
/*!
* ### .ifError(object)
*
* Asserts if value is not a false value, and throws if it is a true value.
* This is added to allow for chai to be a drop-in replacement for Node's
* assert class.
*
* var err = new Error('I am a custom error');
* assert.ifError(err); // Rethrows err!
*
* @name ifError
* @param {Object} object
* @namespace Assert
* @api public
*/
assert.ifError = function (val) {
if (val) {
throw(val);
}
};
/**
* ### .isExtensible(object)
*
* Asserts that `object` is extensible (can have new properties added to it).
*
* assert.isExtensible({});
*
* @name isExtensible
* @alias extensible
* @param {Object} object
* @param {String} message _optional_
* @namespace Assert
* @api public
*/
assert.isExtensible = function (obj, msg) {
new Assertion(obj, msg).to.be.extensible;
};
/**
* ### .isNotExtensible(object)
*
* Asserts that `object` is _not_ extensible.
*
* var nonExtensibleObject = Object.preventExtensions({});
* var sealedObject = Object.seal({});
* var frozenObject = Object.freese({});
*
* assert.isNotExtensible(nonExtensibleObject);
* assert.isNotExtensible(sealedObject);
* assert.isNotExtensible(frozenObject);
*
* @name isNotExtensible
* @alias notExtensible
* @param {Object} object
* @param {String} message _optional_
* @namespace Assert
* @api public
*/
assert.isNotExtensible = function (obj, msg) {
new Assertion(obj, msg).to.not.be.extensible;
};
/**
* ### .isSealed(object)
*
* Asserts that `object` is sealed (cannot have new properties added to it
* and its existing properties cannot be removed).
*
* var sealedObject = Object.seal({});
* var frozenObject = Object.seal({});
*
* assert.isSealed(sealedObject);
* assert.isSealed(frozenObject);
*
* @name isSealed
* @alias sealed
* @param {Object} object
* @param {String} message _optional_
* @namespace Assert
* @api public
*/
assert.isSealed = function (obj, msg) {
new Assertion(obj, msg).to.be.sealed;
};
/**
* ### .isNotSealed(object)
*
* Asserts that `object` is _not_ sealed.
*
* assert.isNotSealed({});
*
* @name isNotSealed
* @alias notSealed
* @param {Object} object
* @param {String} message _optional_
* @namespace Assert
* @api public
*/
assert.isNotSealed = function (obj, msg) {
new Assertion(obj, msg).to.not.be.sealed;
};
/**
* ### .isFrozen(object)
*
* Asserts that `object` is frozen (cannot have new properties added to it
* and its existing properties cannot be modified).
*
* var frozenObject = Object.freeze({});
* assert.frozen(frozenObject);
*
* @name isFrozen
* @alias frozen
* @param {Object} object
* @param {String} message _optional_
* @namespace Assert
* @api public
*/
assert.isFrozen = function (obj, msg) {
new Assertion(obj, msg).to.be.frozen;
};
/**
* ### .isNotFrozen(object)
*
* Asserts that `object` is _not_ frozen.
*
* assert.isNotFrozen({});
*
* @name isNotFrozen
* @alias notFrozen
* @param {Object} object
* @param {String} message _optional_
* @namespace Assert
* @api public
*/
assert.isNotFrozen = function (obj, msg) {
new Assertion(obj, msg).to.not.be.frozen;
};
/*!
* Aliases.
*/
(function alias(name, as){
assert[as] = assert[name];
return alias;
})
('isOk', 'ok')
('isNotOk', 'notOk')
('throws', 'throw')
('throws', 'Throw')
('isExtensible', 'extensible')
('isNotExtensible', 'notExtensible')
('isSealed', 'sealed')
('isNotSealed', 'notSealed')
('isFrozen', 'frozen')
('isNotFrozen', 'notFrozen');
};
