@moomfe/zenjs
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ZenJS 是一个高性能的 JavaScript 工具库。
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JavaScript
(function (f) {
if (typeof exports === "object" && typeof module !== "undefined") {
module.exports = f()
} else if (typeof define === "function" && define.amd) {
define([], f)
} else {
var g;
if (typeof window !== "undefined") {
g = window
} else if (typeof global !== "undefined") {
g = global
} else if (typeof self !== "undefined") {
g = self
} else {
g = this
}
g.chai = f()
}
})(function () {
var define, module, exports;
return (function () {
function r(e, n, t) {
function o(i, f) {
if (!n[i]) {
if (!e[i]) {
var c = "function" == typeof require && require;
if (!f && c) return c(i, !0);
if (u) return u(i, !0);
var a = new Error("Cannot find module '" + i + "'");
throw a.code = "MODULE_NOT_FOUND", a
}
var p = n[i] = {
exports: {}
};
e[i][0].call(p.exports, function (r) {
var n = e[i][1][r];
return o(n || r)
}, p, p.exports, r, e, n, t)
}
return n[i].exports
}
for (var u = "function" == typeof require && require, i = 0; i < t.length; i++) o(t[i]);
return o
}
return r
})()({
1: [function (require, module, exports) {
module.exports = require('./lib/chai');
}, {
"./lib/chai": 2
}],
2: [function (require, module, exports) {
/*!
* chai
* Copyright(c) 2011-2014 Jake Luer <jake@alogicalparadox.com>
* MIT Licensed
*/
var used = [];
/*!
* Chai version
*/
exports.version = '4.2.0';
/*!
* Assertion Error
*/
exports.AssertionError = require('assertion-error');
/*!
* Utils for plugins (not exported)
*/
var util = require('./chai/utils');
/**
* # .use(function)
*
* Provides a way to extend the internals of Chai.
*
* @param {Function}
* @returns {this} for chaining
* @api public
*/
exports.use = function (fn) {
if (!~used.indexOf(fn)) {
fn(exports, util);
used.push(fn);
}
return exports;
};
/*!
* Utility Functions
*/
exports.util = util;
/*!
* Configuration
*/
var config = require('./chai/config');
exports.config = config;
/*!
* Primary `Assertion` prototype
*/
var assertion = require('./chai/assertion');
exports.use(assertion);
/*!
* Core Assertions
*/
var core = require('./chai/core/assertions');
exports.use(core);
/*!
* Expect interface
*/
var expect = require('./chai/interface/expect');
exports.use(expect);
/*!
* Should interface
*/
var should = require('./chai/interface/should');
exports.use(should);
/*!
* Assert interface
*/
var assert = require('./chai/interface/assert');
exports.use(assert);
}, {
"./chai/assertion": 3,
"./chai/config": 4,
"./chai/core/assertions": 5,
"./chai/interface/assert": 6,
"./chai/interface/expect": 7,
"./chai/interface/should": 8,
"./chai/utils": 22,
"assertion-error": 33
}],
3: [function (require, module, exports) {
/*!
* chai
* http://chaijs.com
* Copyright(c) 2011-2014 Jake Luer <jake@alogicalparadox.com>
* MIT Licensed
*/
var config = require('./config');
module.exports = function (_chai, util) {
/*!
* Module dependencies.
*/
var AssertionError = _chai.AssertionError,
flag = util.flag;
/*!
* Module export.
*/
_chai.Assertion = Assertion;
/*!
* Assertion Constructor
*
* Creates object for chaining.
*
* `Assertion` objects contain metadata in the form of flags. Three flags can
* be assigned during instantiation by passing arguments to this constructor:
*
* - `object`: This flag contains the target of the assertion. For example, in
* the assertion `expect(numKittens).to.equal(7);`, the `object` flag will
* contain `numKittens` so that the `equal` assertion can reference it when
* needed.
*
* - `message`: This flag contains an optional custom error message to be
* prepended to the error message that's generated by the assertion when it
* fails.
*
* - `ssfi`: This flag stands for "start stack function indicator". It
* contains a function reference that serves as the starting point for
* removing frames from the stack trace of the error that's created by the
* assertion when it fails. The goal is to provide a cleaner stack trace to
* end users by removing Chai's internal functions. Note that it only works
* in environments that support `Error.captureStackTrace`, and only when
* `Chai.config.includeStack` hasn't been set to `false`.
*
* - `lockSsfi`: This flag controls whether or not the given `ssfi` flag
* should retain its current value, even as assertions are chained off of
* this object. This is usually set to `true` when creating a new assertion
* from within another assertion. It's also temporarily set to `true` before
* an overwritten assertion gets called by the overwriting assertion.
*
* @param {Mixed} obj target of the assertion
* @param {String} msg (optional) custom error message
* @param {Function} ssfi (optional) starting point for removing stack frames
* @param {Boolean} lockSsfi (optional) whether or not the ssfi flag is locked
* @api private
*/
function Assertion(obj, msg, ssfi, lockSsfi) {
flag(this, 'ssfi', ssfi || Assertion);
flag(this, 'lockSsfi', lockSsfi);
flag(this, 'object', obj);
flag(this, 'message', msg);
return util.proxify(this);
}
Object.defineProperty(Assertion, 'includeStack', {
get: function () {
console.warn('Assertion.includeStack is deprecated, use chai.config.includeStack instead.');
return config.includeStack;
},
set: function (value) {
console.warn('Assertion.includeStack is deprecated, use chai.config.includeStack instead.');
config.includeStack = value;
}
});
Object.defineProperty(Assertion, 'showDiff', {
get: function () {
console.warn('Assertion.showDiff is deprecated, use chai.config.showDiff instead.');
return config.showDiff;
},
set: function (value) {
console.warn('Assertion.showDiff is deprecated, use chai.config.showDiff instead.');
config.showDiff = value;
}
});
Assertion.addProperty = function (name, fn) {
util.addProperty(this.prototype, name, fn);
};
Assertion.addMethod = function (name, fn) {
util.addMethod(this.prototype, name, fn);
};
Assertion.addChainableMethod = function (name, fn, chainingBehavior) {
util.addChainableMethod(this.prototype, name, fn, chainingBehavior);
};
Assertion.overwriteProperty = function (name, fn) {
util.overwriteProperty(this.prototype, name, fn);
};
Assertion.overwriteMethod = function (name, fn) {
util.overwriteMethod(this.prototype, name, fn);
};
Assertion.overwriteChainableMethod = function (name, fn, chainingBehavior) {
util.overwriteChainableMethod(this.prototype, name, fn, chainingBehavior);
};
/**
* ### .assert(expression, message, negateMessage, expected, actual, showDiff)
*
* Executes an expression and check expectations. Throws AssertionError for reporting if test doesn't pass.
*
* @name assert
* @param {Philosophical} expression to be tested
* @param {String|Function} message or function that returns message to display if expression fails
* @param {String|Function} negatedMessage or function that returns negatedMessage to display if negated expression fails
* @param {Mixed} expected value (remember to check for negation)
* @param {Mixed} actual (optional) will default to `this.obj`
* @param {Boolean} showDiff (optional) when set to `true`, assert will display a diff in addition to the message if expression fails
* @api private
*/
Assertion.prototype.assert = function (expr, msg, negateMsg, expected, _actual, showDiff) {
var ok = util.test(this, arguments);
if (false !== showDiff) showDiff = true;
if (undefined === expected && undefined === _actual) showDiff = false;
if (true !== config.showDiff) showDiff = false;
if (!ok) {
msg = util.getMessage(this, arguments);
var actual = util.getActual(this, arguments);
throw new AssertionError(msg, {
actual: actual,
expected: expected,
showDiff: showDiff
}, (config.includeStack) ? this.assert : flag(this, 'ssfi'));
}
};
/*!
* ### ._obj
*
* Quick reference to stored `actual` value for plugin developers.
*
* @api private
*/
Object.defineProperty(Assertion.prototype, '_obj', {
get: function () {
return flag(this, 'object');
},
set: function (val) {
flag(this, 'object', val);
}
});
};
}, {
"./config": 4
}],
4: [function (require, module, exports) {
module.exports = {
/**
* ### config.includeStack
*
* User configurable property, influences whether stack trace
* is included in Assertion error message. Default of false
* suppresses stack trace in the error message.
*
* chai.config.includeStack = true; // enable stack on error
*
* @param {Boolean}
* @api public
*/
includeStack: false,
/**
* ### config.showDiff
*
* User configurable property, influences whether or not
* the `showDiff` flag should be included in the thrown
* AssertionErrors. `false` will always be `false`; `true`
* will be true when the assertion has requested a diff
* be shown.
*
* @param {Boolean}
* @api public
*/
showDiff: true,
/**
* ### config.truncateThreshold
*
* User configurable property, sets length threshold for actual and
* expected values in assertion errors. If this threshold is exceeded, for
* example for large data structures, the value is replaced with something
* like `[ Array(3) ]` or `{ Object (prop1, prop2) }`.
*
* Set it to zero if you want to disable truncating altogether.
*
* This is especially userful when doing assertions on arrays: having this
* set to a reasonable large value makes the failure messages readily
* inspectable.
*
* chai.config.truncateThreshold = 0; // disable truncating
*
* @param {Number}
* @api public
*/
truncateThreshold: 40,
/**
* ### config.useProxy
*
* User configurable property, defines if chai will use a Proxy to throw
* an error when a non-existent property is read, which protects users
* from typos when using property-based assertions.
*
* Set it to false if you want to disable this feature.
*
* chai.config.useProxy = false; // disable use of Proxy
*
* This feature is automatically disabled regardless of this config value
* in environments that don't support proxies.
*
* @param {Boolean}
* @api public
*/
useProxy: true,
/**
* ### config.proxyExcludedKeys
*
* User configurable property, defines which properties should be ignored
* instead of throwing an error if they do not exist on the assertion.
* This is only applied if the environment Chai is running in supports proxies and
* if the `useProxy` configuration setting is enabled.
* By default, `then` and `inspect` will not throw an error if they do not exist on the
* assertion object because the `.inspect` property is read by `util.inspect` (for example, when
* using `console.log` on the assertion object) and `.then` is necessary for promise type-checking.
*
* // By default these keys will not throw an error if they do not exist on the assertion object
* chai.config.proxyExcludedKeys = ['then', 'inspect'];
*
* @param {Array}
* @api public
*/
proxyExcludedKeys: ['then', 'catch', 'inspect', 'toJSON']
};
}, {}],
5: [function (require, module, exports) {
/*!
* chai
* http://chaijs.com
* Copyright(c) 2011-2014 Jake Luer <jake@alogicalparadox.com>
* MIT Licensed
*/
module.exports = function (chai, _) {
var Assertion = chai.Assertion,
AssertionError = chai.AssertionError,
flag = _.flag;
/**
* ### Language Chains
*
* The following are provided as chainable getters to improve the readability
* of your assertions.
*
* **Chains**
*
* - to
* - be
* - been
* - is
* - that
* - which
* - and
* - has
* - have
* - with
* - at
* - of
* - same
* - but
* - does
* - still
*
* @name language chains
* @namespace BDD
* @api public
*/
['to', 'be', 'been', 'is', 'and', 'has', 'have', 'with', 'that', 'which', 'at', 'of', 'same', 'but', 'does', 'still'].forEach(function (chain) {
Assertion.addProperty(chain);
});
/**
* ### .not
*
* Negates all assertions that follow in the chain.
*
* expect(function () {}).to.not.throw();
* expect({a: 1}).to.not.have.property('b');
* expect([1, 2]).to.be.an('array').that.does.not.include(3);
*
* Just because you can negate any assertion with `.not` doesn't mean you
* should. With great power comes great responsibility. It's often best to
* assert that the one expected output was produced, rather than asserting
* that one of countless unexpected outputs wasn't produced. See individual
* assertions for specific guidance.
*
* expect(2).to.equal(2); // Recommended
* expect(2).to.not.equal(1); // Not recommended
*
* @name not
* @namespace BDD
* @api public
*/
Assertion.addProperty('not', function () {
flag(this, 'negate', true);
});
/**
* ### .deep
*
* Causes all `.equal`, `.include`, `.members`, `.keys`, and `.property`
* assertions that follow in the chain to use deep equality instead of strict
* (`===`) equality. See the `deep-eql` project page for info on the deep
* equality algorithm: https://github.com/chaijs/deep-eql.
*
* // Target object deeply (but not strictly) equals `{a: 1}`
* expect({a: 1}).to.deep.equal({a: 1});
* expect({a: 1}).to.not.equal({a: 1});
*
* // Target array deeply (but not strictly) includes `{a: 1}`
* expect([{a: 1}]).to.deep.include({a: 1});
* expect([{a: 1}]).to.not.include({a: 1});
*
* // Target object deeply (but not strictly) includes `x: {a: 1}`
* expect({x: {a: 1}}).to.deep.include({x: {a: 1}});
* expect({x: {a: 1}}).to.not.include({x: {a: 1}});
*
* // Target array deeply (but not strictly) has member `{a: 1}`
* expect([{a: 1}]).to.have.deep.members([{a: 1}]);
* expect([{a: 1}]).to.not.have.members([{a: 1}]);
*
* // Target set deeply (but not strictly) has key `{a: 1}`
* expect(new Set([{a: 1}])).to.have.deep.keys([{a: 1}]);
* expect(new Set([{a: 1}])).to.not.have.keys([{a: 1}]);
*
* // Target object deeply (but not strictly) has property `x: {a: 1}`
* expect({x: {a: 1}}).to.have.deep.property('x', {a: 1});
* expect({x: {a: 1}}).to.not.have.property('x', {a: 1});
*
* @name deep
* @namespace BDD
* @api public
*/
Assertion.addProperty('deep', function () {
flag(this, 'deep', true);
});
/**
* ### .nested
*
* Enables dot- and bracket-notation in all `.property` and `.include`
* assertions that follow in the chain.
*
* expect({a: {b: ['x', 'y']}}).to.have.nested.property('a.b[1]');
* expect({a: {b: ['x', 'y']}}).to.nested.include({'a.b[1]': 'y'});
*
* If `.` or `[]` are part of an actual property name, they can be escaped by
* adding two backslashes before them.
*
* expect({'.a': {'[b]': 'x'}}).to.have.nested.property('\\.a.\\[b\\]');
* expect({'.a': {'[b]': 'x'}}).to.nested.include({'\\.a.\\[b\\]': 'x'});
*
* `.nested` cannot be combined with `.own`.
*
* @name nested
* @namespace BDD
* @api public
*/
Assertion.addProperty('nested', function () {
flag(this, 'nested', true);
});
/**
* ### .own
*
* Causes all `.property` and `.include` assertions that follow in the chain
* to ignore inherited properties.
*
* Object.prototype.b = 2;
*
* expect({a: 1}).to.have.own.property('a');
* expect({a: 1}).to.have.property('b');
* expect({a: 1}).to.not.have.own.property('b');
*
* expect({a: 1}).to.own.include({a: 1});
* expect({a: 1}).to.include({b: 2}).but.not.own.include({b: 2});
*
* `.own` cannot be combined with `.nested`.
*
* @name own
* @namespace BDD
* @api public
*/
Assertion.addProperty('own', function () {
flag(this, 'own', true);
});
/**
* ### .ordered
*
* Causes all `.members` assertions that follow in the chain to require that
* members be in the same order.
*
* expect([1, 2]).to.have.ordered.members([1, 2])
* .but.not.have.ordered.members([2, 1]);
*
* When `.include` and `.ordered` are combined, the ordering begins at the
* start of both arrays.
*
* expect([1, 2, 3]).to.include.ordered.members([1, 2])
* .but.not.include.ordered.members([2, 3]);
*
* @name ordered
* @namespace BDD
* @api public
*/
Assertion.addProperty('ordered', function () {
flag(this, 'ordered', true);
});
/**
* ### .any
*
* Causes all `.keys` assertions that follow in the chain to only require that
* the target have at least one of the given keys. This is the opposite of
* `.all`, which requires that the target have all of the given keys.
*
* expect({a: 1, b: 2}).to.not.have.any.keys('c', 'd');
*
* See the `.keys` doc for guidance on when to use `.any` or `.all`.
*
* @name any
* @namespace BDD
* @api public
*/
Assertion.addProperty('any', function () {
flag(this, 'any', true);
flag(this, 'all', false);
});
/**
* ### .all
*
* Causes all `.keys` assertions that follow in the chain to require that the
* target have all of the given keys. This is the opposite of `.any`, which
* only requires that the target have at least one of the given keys.
*
* expect({a: 1, b: 2}).to.have.all.keys('a', 'b');
*
* Note that `.all` is used by default when neither `.all` nor `.any` are
* added earlier in the chain. However, it's often best to add `.all` anyway
* because it improves readability.
*
* See the `.keys` doc for guidance on when to use `.any` or `.all`.
*
* @name all
* @namespace BDD
* @api public
*/
Assertion.addProperty('all', function () {
flag(this, 'all', true);
flag(this, 'any', false);
});
/**
* ### .a(type[, msg])
*
* Asserts that the target's type is equal to the given string `type`. Types
* are case insensitive. See the `type-detect` project page for info on the
* type detection algorithm: https://github.com/chaijs/type-detect.
*
* expect('foo').to.be.a('string');
* expect({a: 1}).to.be.an('object');
* expect(null).to.be.a('null');
* expect(undefined).to.be.an('undefined');
* expect(new Error).to.be.an('error');
* expect(Promise.resolve()).to.be.a('promise');
* expect(new Float32Array).to.be.a('float32array');
* expect(Symbol()).to.be.a('symbol');
*
* `.a` supports objects that have a custom type set via `Symbol.toStringTag`.
*
* var myObj = {
* [Symbol.toStringTag]: 'myCustomType'
* };
*
* expect(myObj).to.be.a('myCustomType').but.not.an('object');
*
* It's often best to use `.a` to check a target's type before making more
* assertions on the same target. That way, you avoid unexpected behavior from
* any assertion that does different things based on the target's type.
*
* expect([1, 2, 3]).to.be.an('array').that.includes(2);
* expect([]).to.be.an('array').that.is.empty;
*
* Add `.not` earlier in the chain to negate `.a`. However, it's often best to
* assert that the target is the expected type, rather than asserting that it
* isn't one of many unexpected types.
*
* expect('foo').to.be.a('string'); // Recommended
* expect('foo').to.not.be.an('array'); // Not recommended
*
* `.a` accepts an optional `msg` argument which is a custom error message to
* show when the assertion fails. The message can also be given as the second
* argument to `expect`.
*
* expect(1).to.be.a('string', 'nooo why fail??');
* expect(1, 'nooo why fail??').to.be.a('string');
*
* `.a` can also be used as a language chain to improve the readability of
* your assertions.
*
* expect({b: 2}).to.have.a.property('b');
*
* The alias `.an` can be used interchangeably with `.a`.
*
* @name a
* @alias an
* @param {String} type
* @param {String} msg _optional_
* @namespace BDD
* @api public
*/
function an(type, msg) {
if (msg) flag(this, 'message', msg);
type = type.toLowerCase();
var obj = flag(this, 'object'),
article = ~['a', 'e', 'i', 'o', 'u'].indexOf(type.charAt(0)) ? 'an ' : 'a ';
this.assert(
type === _.type(obj).toLowerCase(), 'expected #{this} to be ' + article + type, 'expected #{this} not to be ' + article + type
);
}
Assertion.addChainableMethod('an', an);
Assertion.addChainableMethod('a', an);
/**
* ### .include(val[, msg])
*
* When the target is a string, `.include` asserts that the given string `val`
* is a substring of the target.
*
* expect('foobar').to.include('foo');
*
* When the target is an array, `.include` asserts that the given `val` is a
* member of the target.
*
* expect([1, 2, 3]).to.include(2);
*
* When the target is an object, `.include` asserts that the given object
* `val`'s properties are a subset of the target's properties.
*
* expect({a: 1, b: 2, c: 3}).to.include({a: 1, b: 2});
*
* When the target is a Set or WeakSet, `.include` asserts that the given `val` is a
* member of the target. SameValueZero equality algorithm is used.
*
* expect(new Set([1, 2])).to.include(2);
*
* When the target is a Map, `.include` asserts that the given `val` is one of
* the values of the target. SameValueZero equality algorithm is used.
*
* expect(new Map([['a', 1], ['b', 2]])).to.include(2);
*
* Because `.include` does different things based on the target's type, it's
* important to check the target's type before using `.include`. See the `.a`
* doc for info on testing a target's type.
*
* expect([1, 2, 3]).to.be.an('array').that.includes(2);
*
* By default, strict (`===`) equality is used to compare array members and
* object properties. Add `.deep` earlier in the chain to use deep equality
* instead (WeakSet targets are not supported). See the `deep-eql` project
* page for info on the deep equality algorithm: https://github.com/chaijs/deep-eql.
*
* // Target array deeply (but not strictly) includes `{a: 1}`
* expect([{a: 1}]).to.deep.include({a: 1});
* expect([{a: 1}]).to.not.include({a: 1});
*
* // Target object deeply (but not strictly) includes `x: {a: 1}`
* expect({x: {a: 1}}).to.deep.include({x: {a: 1}});
* expect({x: {a: 1}}).to.not.include({x: {a: 1}});
*
* By default, all of the target's properties are searched when working with
* objects. This includes properties that are inherited and/or non-enumerable.
* Add `.own` earlier in the chain to exclude the target's inherited
* properties from the search.
*
* Object.prototype.b = 2;
*
* expect({a: 1}).to.own.include({a: 1});
* expect({a: 1}).to.include({b: 2}).but.not.own.include({b: 2});
*
* Note that a target object is always only searched for `val`'s own
* enumerable properties.
*
* `.deep` and `.own` can be combined.
*
* expect({a: {b: 2}}).to.deep.own.include({a: {b: 2}});
*
* Add `.nested` earlier in the chain to enable dot- and bracket-notation when
* referencing nested properties.
*
* expect({a: {b: ['x', 'y']}}).to.nested.include({'a.b[1]': 'y'});
*
* If `.` or `[]` are part of an actual property name, they can be escaped by
* adding two backslashes before them.
*
* expect({'.a': {'[b]': 2}}).to.nested.include({'\\.a.\\[b\\]': 2});
*
* `.deep` and `.nested` can be combined.
*
* expect({a: {b: [{c: 3}]}}).to.deep.nested.include({'a.b[0]': {c: 3}});
*
* `.own` and `.nested` cannot be combined.
*
* Add `.not` earlier in the chain to negate `.include`.
*
* expect('foobar').to.not.include('taco');
* expect([1, 2, 3]).to.not.include(4);
*
* However, it's dangerous to negate `.include` when the target is an object.
* The problem is that it creates uncertain expectations by asserting that the
* target object doesn't have all of `val`'s key/value pairs but may or may
* not have some of them. It's often best to identify the exact output that's
* expected, and then write an assertion that only accepts that exact output.
*
* When the target object isn't even expected to have `val`'s keys, it's
* often best to assert exactly that.
*
* expect({c: 3}).to.not.have.any.keys('a', 'b'); // Recommended
* expect({c: 3}).to.not.include({a: 1, b: 2}); // Not recommended
*
* When the target object is expected to have `val`'s keys, it's often best to
* assert that each of the properties has its expected value, rather than
* asserting that each property doesn't have one of many unexpected values.
*
* expect({a: 3, b: 4}).to.include({a: 3, b: 4}); // Recommended
* expect({a: 3, b: 4}).to.not.include({a: 1, b: 2}); // Not recommended
*
* `.include` accepts an optional `msg` argument which is a custom error
* message to show when the assertion fails. The message can also be given as
* the second argument to `expect`.
*
* expect([1, 2, 3]).to.include(4, 'nooo why fail??');
* expect([1, 2, 3], 'nooo why fail??').to.include(4);
*
* `.include` can also be used as a language chain, causing all `.members` and
* `.keys` assertions that follow in the chain to require the target to be a
* superset of the expected set, rather than an identical set. Note that
* `.members` ignores duplicates in the subset when `.include` is added.
*
* // Target object's keys are a superset of ['a', 'b'] but not identical
* expect({a: 1, b: 2, c: 3}).to.include.all.keys('a', 'b');
* expect({a: 1, b: 2, c: 3}).to.not.have.all.keys('a', 'b');
*
* // Target array is a superset of [1, 2] but not identical
* expect([1, 2, 3]).to.include.members([1, 2]);
* expect([1, 2, 3]).to.not.have.members([1, 2]);
*
* // Duplicates in the subset are ignored
* expect([1, 2, 3]).to.include.members([1, 2, 2, 2]);
*
* Note that adding `.any` earlier in the chain causes the `.keys` assertion
* to ignore `.include`.
*
* // Both assertions are identical
* expect({a: 1}).to.include.any.keys('a', 'b');
* expect({a: 1}).to.have.any.keys('a', 'b');
*
* The aliases `.includes`, `.contain`, and `.contains` can be used
* interchangeably with `.include`.
*
* @name include
* @alias contain
* @alias includes
* @alias contains
* @param {Mixed} val
* @param {String} msg _optional_
* @namespace BDD
* @api public
*/
function SameValueZero(a, b) {
return (_.isNaN(a) && _.isNaN(b)) || a === b;
}
function includeChainingBehavior() {
flag(this, 'contains', true);
}
function include(val, msg) {
if (msg) flag(this, 'message', msg);
var obj = flag(this, 'object'),
objType = _.type(obj).toLowerCase(),
flagMsg = flag(this, 'message'),
negate = flag(this, 'negate'),
ssfi = flag(this, 'ssfi'),
isDeep = flag(this, 'deep'),
descriptor = isDeep ? 'deep ' : '';
flagMsg = flagMsg ? flagMsg + ': ' : '';
var included = false;
switch (objType) {
case 'string':
included = obj.indexOf(val) !== -1;
break;
case 'weakset':
if (isDeep) {
throw new AssertionError(
flagMsg + 'unable to use .deep.include with WeakSet',
undefined,
ssfi
);
}
included = obj.has(val);
break;
case 'map':
var isEql = isDeep ? _.eql : SameValueZero;
obj.forEach(function (item) {
included = included || isEql(item, val);
});
break;
case 'set':
if (isDeep) {
obj.forEach(function (item) {
included = included || _.eql(item, val);
});
} else {
included = obj.has(val);
}
break;
case 'array':
if (isDeep) {
included = obj.some(function (item) {
return _.eql(item, val);
})
} else {
included = obj.indexOf(val) !== -1;
}
break;
default:
// This block is for asserting a subset of properties in an object.
// `_.expectTypes` isn't used here because `.include` should work with
// objects with a custom `@@toStringTag`.
if (val !== Object(val)) {
throw new AssertionError(
flagMsg + 'object tested must be an array, a map, an object,' +
' a set, a string, or a weakset, but ' + objType + ' given',
undefined,
ssfi
);
}
var props = Object.keys(val),
firstErr = null,
numErrs = 0;
props.forEach(function (prop) {
var propAssertion = new Assertion(obj);
_.transferFlags(this, propAssertion, true);
flag(propAssertion, 'lockSsfi', true);
if (!negate || props.length === 1) {
propAssertion.property(prop, val[prop]);
return;
}
try {
propAssertion.property(prop, val[prop]);
} catch (err) {
if (!_.checkError.compatibleConstructor(err, AssertionError)) {
throw err;
}
if (firstErr === null) firstErr = err;
numErrs++;
}
}, this);
// When validating .not.include with multiple properties, we only want
// to throw an assertion error if all of the properties are included,
// in which case we throw the first property assertion error that we
// encountered.
if (negate && props.length > 1 && numErrs === props.length) {
throw firstErr;
}
return;
}
// Assert inclusion in collection or substring in a string.
this.assert(
included, 'expected #{this} to ' + descriptor + 'include ' + _.inspect(val), 'expected #{this} to not ' + descriptor + 'include ' + _.inspect(val));
}
Assertion.addChainableMethod('include', include, includeChainingBehavior);
Assertion.addChainableMethod('contain', include, includeChainingBehavior);
Assertion.addChainableMethod('contains', include, includeChainingBehavior);
Assertion.addChainableMethod('includes', include, includeChainingBehavior);
/**
* ### .ok
*
* Asserts that the target is a truthy value (considered `true` in boolean context).
* However, it's often best to assert that the target is strictly (`===`) or
* deeply equal to its expected value.
*
* expect(1).to.equal(1); // Recommended
* expect(1).to.be.ok; // Not recommended
*
* expect(true).to.be.true; // Recommended
* expect(true).to.be.ok; // Not recommended
*
* Add `.not` earlier in the chain to negate `.ok`.
*
* expect(0).to.equal(0); // Recommended
* expect(0).to.not.be.ok; // Not recommended
*
* expect(false).to.be.false; // Recommended
* expect(false).to.not.be.ok; // Not recommended
*
* expect(null).to.be.null; // Recommended
* expect(null).to.not.be.ok; // Not recommended
*
* expect(undefined).to.be.undefined; // Recommended
* expect(undefined).to.not.be.ok; // Not recommended
*
* A custom error message can be given as the second argument to `expect`.
*
* expect(false, 'nooo why fail??').to.be.ok;
*
* @name ok
* @namespace BDD
* @api public
*/
Assertion.addProperty('ok', function () {
this.assert(
flag(this, 'object'), 'expected #{this} to be truthy', 'expected #{this} to be falsy');
});
/**
* ### .true
*
* Asserts that the target is strictly (`===`) equal to `true`.
*
* expect(true).to.be.true;
*
* Add `.not` earlier in the chain to negate `.true`. However, it's often best
* to assert that the target is equal to its expected value, rather than not
* equal to `true`.
*
* expect(false).to.be.false; // Recommended
* expect(false).to.not.be.true; // Not recommended
*
* expect(1).to.equal(1); // Recommended
* expect(1).to.not.be.true; // Not recommended
*
* A custom error message can be given as the second argument to `expect`.
*
* expect(false, 'nooo why fail??').to.be.true;
*
* @name true
* @namespace BDD
* @api public
*/
Assertion.addProperty('true', function () {
this.assert(
true === flag(this, 'object'), 'expected #{this} to be true', 'expected #{this} to be false', flag(this, 'negate') ? false : true
);
});
/**
* ### .false
*
* Asserts that the target is strictly (`===`) equal to `false`.
*
* expect(false).to.be.false;
*
* Add `.not` earlier in the chain to negate `.false`. However, it's often
* best to assert that the target is equal to its expected value, rather than
* not equal to `false`.
*
* expect(true).to.be.true; // Recommended
* expect(true).to.not.be.false; // Not recommended
*
* expect(1).to.equal(1); // Recommended
* expect(1).to.not.be.false; // Not recommended
*
* A custom error message can be given as the second argument to `expect`.
*
* expect(true, 'nooo why fail??').to.be.false;
*
* @name false
* @namespace BDD
* @api public
*/
Assertion.addProperty('false', function () {
this.assert(
false === flag(this, 'object'), 'expected #{this} to be false', 'expected #{this} to be true', flag(this, 'negate') ? true : false
);
});
/**
* ### .null
*
* Asserts that the target is strictly (`===`) equal to `null`.
*
* expect(null).to.be.null;
*
* Add `.not` earlier in the chain to negate `.null`. However, it's often best
* to assert that the target is equal to its expected value, rather than not
* equal to `null`.
*
* expect(1).to.equal(1); // Recommended
* expect(1).to.not.be.null; // Not recommended
*
* A custom error message can be given as the second argument to `expect`.
*
* expect(42, 'nooo why fail??').to.be.null;
*
* @name null
* @namespace BDD
* @api public
*/
Assertion.addProperty('null', function () {
this.assert(
null === flag(this, 'object'), 'expected #{this} to be null', 'expected #{this} not to be null'
);
});
/**
* ### .undefined
*
* Asserts that the target is strictly (`===`) equal to `undefined`.
*
* expect(undefined).to.be.undefined;
*
* Add `.not` earlier in the chain to negate `.undefined`. However, it's often
* best to assert that the target is equal to its expected value, rather than
* not equal to `undefined`.
*
* expect(1).to.equal(1); // Recommended
* expect(1).to.not.be.undefined; // Not recommended
*
* A custom error message can be given as the second argument to `expect`.
*
* expect(42, 'nooo why fail??').to.be.undefined;
*
* @name undefined
* @namespace BDD
* @api public
*/
Assertion.addProperty('undefined', function () {
this.assert(
undefined === flag(this, 'object'), 'expected #{this} to be undefined', 'expected #{this} not to be undefined'
);
});
/**
* ### .NaN
*
* Asserts that the target is exactly `NaN`.
*
* expect(NaN).to.be.NaN;
*
* Add `.not` earlier in the chain to negate `.NaN`. However, it's often best
* to assert that the target is equal to its expected value, rather than not
* equal to `NaN`.
*
* expect('foo').to.equal('foo'); // Recommended
* expect('foo').to.not.be.NaN; // Not recommended
*
* A custom error message can be given as the second argument to `expect`.
*
* expect(42, 'nooo why fail??').to.be.NaN;
*
* @name NaN
* @namespace BDD
* @api public
*/
Assertion.addProperty('NaN', function () {
this.assert(
_.isNaN(flag(this, 'object')), 'expected #{this} to be NaN', 'expected #{this} not to be NaN'
);
});
/**
* ### .exist
*
* Asserts that the target is not strictly (`===`) equal to either `null` or
* `undefined`. However, it's often best to assert that the target is equal to
* its expected value.
*
* expect(1).to.equal(1); // Recommended
* expect(1).to.exist; // Not recommended
*
* expect(0).to.equal(0); // Recommended
* expect(0).to.exist; // Not recommended
*
* Add `.not` earlier in the chain to negate `.exist`.
*
* expect(null).to.be.null; // Recommended
* expect(null).to.not.exist; // Not recommended
*
* expect(undefined).to.be.undefined; // Recommended
* expect(undefined).to.not.exist; // Not recommended
*
* A custom error message can be given as the second argument to `expect`.
*
* expect(null, 'nooo why fail??').to.exist;
*
* @name exist
* @namespace BDD
* @api public
*/
Assertion.addProperty('exist', function () {
var val = flag(this, 'object');
this.assert(
val !== null && val !== undefined, 'expected #{this} to exist', 'expected #{this} to not exist'
);
});
/**
* ### .empty
*
* When the target is a string or array, `.empty` asserts that the target's
* `length` property is strictly (`===`) equal to `0`.
*
* expect([]).to.be.empty;
* expect('').to.be.empty;
*
* When the target is a map or set, `.empty` asserts that the target's `size`
* property is strictly equal to `0`.
*
* expect(new Set()).to.be.empty;
* expect(new Map()).to.be.empty;
*
* When the target is a non-function object, `.empty` asserts that the target
* doesn't have any own enumerable properties. Properties with Symbol-based
* keys are excluded from the count.
*
* expect({}).to.be.empty;
*
* Because `.empty` does different things based on the target's type, it's
* important to check the target's type before using `.empty`. See the `.a`
* doc for info on testing a target's type.
*
* expect([]).to.be.an('array').that.is.empty;
*
* Add `.not` earlier in the chain to negate `.empty`. However, it's often
* best to assert that the target contains its expected number of values,
* rather than asserting that it's not empty.
*
* expect([1, 2, 3]).to.have.lengthOf(3); // Recommended
* expect([1, 2, 3]).to.not.be.empty; // Not recommended
*
* expect(new Set([1, 2, 3])).to.have.property('size', 3); // Recommended
* expect(new Set([1, 2, 3])).to.not.be.empty; // Not recommended
*
* expect(Object.keys({a: 1})).to.have.lengthOf(1); // Recommended
* expect({a: 1}).to.not.be.empty; // Not recommended
*
* A custom error message can be given as the second argument to `expect`.
*
* expect([1, 2, 3], 'nooo why fail??').to.be.empty;
*
* @name empty
* @namespace BDD
* @api public
*/
Assertion.addProperty('empty', function () {
var val = flag(this, 'object'),
ssfi = flag(this, 'ssfi'),
flagMsg = flag(this, 'message'),
itemsCount;
flagMsg = flagMsg ? flagMsg + ': ' : '';
switch (_.type(val).toLowerCase()) {
case 'array':
case 'string':
itemsCount = val.length;
break;
case 'map':
case 'set':
itemsCount = val.size;
break;
case 'weakmap':
case 'weakset':
throw new AssertionError(
flagMsg + '.empty was passed a weak collection',
undefined,
ssfi
);
case 'function':
var msg = flagMsg + '.empty was passed a function ' + _.getName(val);
throw new AssertionError(msg.trim(), undefined, ssfi);
default:
if (val !== Object(val)) {
throw new AssertionError(
flagMsg + '.empty was passed non-string primitive ' + _.inspect(val),
undefined,
ssfi
);
}
itemsCount = Object.keys(val).length;
}
this.assert(
0 === itemsCount, 'expected #{this} to be empty', 'expected #{this} not to be empty'
);
});
/**
* ### .arguments
*
* Asserts that the target is an `arguments` object.
*
* function test () {
* expect(arguments).to.be.arguments;
* }
*
* test();
*
* Add `.not` earlier in the chain to negate `.arguments`. However, it's often
* best to assert which type the target is expected to be, rather than
* asserting that its not an `arguments` object.
*
* expect('foo').to.be.a('string'); // Recommended
* expect('foo').to.not.be.arguments; // Not recommended
*
* A custom error message can be given as the second argument to `expect`.
*
* expect({}, 'nooo why fa