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assertions:
EXPECT / SHOULD
However, it’s dangerous to negate . property when providing val.The problem is that it creates uncertain expectations by asserting that the target either doesn’t have a property with the given key name, or that it does have a property with the given key name but its value isn’t equal to the given val.It’s often best to identify the exact output that’s expected, and then write anASSERT - CHAI
Assert. The assert style is very similar to node.js’ included assert module, with a bit of extra sugar. Of the three style options, assert is the only one that is not chainable. Check out the Style Guide for a comparison.. API ReferenceCHAI SPIES - CHAI
Chai Spies. This is an addon plugin for the chai assertion library. It provides the most basic function spy ability and tests. This library is primarily meant to serve as a starting point for anyone interested in developing chai plugins.CHAI-BIGNUMBER
Assertions. The following assertion methods are provided and will override the existing builtin assertions if the bignumber property is explicitly set as part of the assertion chain:. equal/equals/eq; above/gt/greaterThanCHAI MATCH - CHAI
Chai is a BDD / TDD assertion library for (http://nodejs.org) and the browser that can be delightfully paired with any javascripttesting framework.
CHAI-UUID - CHAI
chai-uuid. Chai plugin for performing assertions on UUIDs. npm install chai-uuid Example. Use the uuid or guid method to test whether the assertion is a valid UUID.CHAI-STRING
chai-string. Matchers for chai to help with common string comparison assertions. Usage Browser CHAICHAI ASSERTION LIBRARYAPIPLUGINSBDDCHAI HTTPINSTALLATION Chai has several interfaces that allow the developer to choose the most comfortable. The chain-capable BDD styles provide an expressive language & readable style, while the TDD assert style provides a CHAI HTTP - CHAIAPIINSTALLATIONPLUGIN UTILITIESASSERTION STYLESGUIDEONLINE TEST SUITE Integration Testing. Chai HTTP provides an interface for live integration testing via superagent.To do this, you must first construct a request to an application or url. SINON.JS ASSERTIONS FOR CHAI Sinon.JS Assertions for Chai. Sinon–Chai provides a set of custom assertions for using the Sinon.JS spy, stub, and mocking framework with the Chai assertion library. You get all the benefits of Chai with all the powerful tools of Sinon.JS. Instead of using Sinon.JS’sassertions:
EXPECT / SHOULD
However, it’s dangerous to negate . property when providing val.The problem is that it creates uncertain expectations by asserting that the target either doesn’t have a property with the given key name, or that it does have a property with the given key name but its value isn’t equal to the given val.It’s often best to identify the exact output that’s expected, and then write anASSERT - CHAI
Assert. The assert style is very similar to node.js’ included assert module, with a bit of extra sugar. Of the three style options, assert is the only one that is not chainable. Check out the Style Guide for a comparison.. API ReferenceCHAI SPIES - CHAI
Chai Spies. This is an addon plugin for the chai assertion library. It provides the most basic function spy ability and tests. This library is primarily meant to serve as a starting point for anyone interested in developing chai plugins.CHAI-BIGNUMBER
Assertions. The following assertion methods are provided and will override the existing builtin assertions if the bignumber property is explicitly set as part of the assertion chain:. equal/equals/eq; above/gt/greaterThanCHAI MATCH - CHAI
Chai is a BDD / TDD assertion library for (http://nodejs.org) and the browser that can be delightfully paired with any javascripttesting framework.
CHAI-UUID - CHAI
chai-uuid. Chai plugin for performing assertions on UUIDs. npm install chai-uuid Example. Use the uuid or guid method to test whether the assertion is a valid UUID.CHAI-STRING
chai-string. Matchers for chai to help with common string comparison assertions. Usage Browser GETTING STARTED GUIDE Welcome to Chai. We are glad that you have decided to give Chai.js a try! If this is your first visit, get acquainted with the basics, such as installation and our included assertion styles.CHAI
Compatibility. Chai as Promised is compatible with all promises following the Promises/A+ specification.. Notably, jQuery’s promises were not up to spec before jQueryCHAI-BN - CHAI
Some Chai properties (e.g. the that. is chain) have no effect other than increasing readability, and can be dropped if less verbosity is desired.. License. MITCHAI-FETCH - CHAI
Chai-fetch is a commonjs module, and should work out of the box in node, or with bundling tools like browserify & webpack. Chai-fetch is written in TypeScript, so will work completely fine with JS, but if you’re using TypeScript too you’ll also get working typings out ofthe box.
CHAI SMOOTHIE
Chai Smoothie - Protractor assertions for Chai. Chai Smoothie smooths out the sharp angles of your Protractor-powered automated web tests.. The library provides a set of custom Chai assertions to help your Protractor-based Serenity/JS tests express their intent better, give assertion errors more meaning, and reduce the amount of time your team spends troubleshooting the failures.CHAI-ARRAYS
chai-arrays . a simple chai plugin for better array assertions. Installation. npm install chai-arraysCHAI
Finally, we can add our assertion to the chain: Text. Test the text value of the dom against supplied string. Exact matches only.CHAI HTTP - CHAI
When passing an app to request; it will automatically open the server for incoming requests (by calling listen()) and, once a request has been made the server will automatically shut down (by calling .close()).If you want to keep the server open, perhaps if you’re making multiple requests, you must call .keepOpen() after .request(), and manually close the server down: DEEP-EQUAL-IN-ANY-ORDER deep-equal-in-any-order. Chai plugin to match objects and arrays deep equality with arrays (including nested ones) being in any order. It works in similar way as deep. equal but it doesn’t checks the arrays order (at any level of nested objects and arrays). The array elements can be any JS entity (boolean, null, number, string, object, array).CHAI-JSON-EQUAL
Chai is a BDD / TDD assertion library for (http://nodejs.org) and the browser that can be delightfully paired with any javascripttesting framework.
CHAICHAI ASSERTION LIBRARYAPIPLUGINSBDDCHAI HTTPINSTALLATION Chai has several interfaces that allow the developer to choose the most comfortable. The chain-capable BDD styles provide an expressive language & readable style, while the TDD assert style provides a GETTING STARTED GUIDE Chai is infinitely more powerful than what is included, limited only by what you want to achieve. The Plugin API is also intended as a way to simplify testing by providing users a way to encapsulate common assertions for repeat use. Core Plugin Concepts covers the basics of using the Chai Plugin API. Building a Helper is a walkthrough forINTRODUCTION
API Reference. The Chai API is broken down by style or task. Assertion Styles. The Expect / Should API covers the BDD assertion styles.; The Assert API covers the TDD assertion style.; Plugins. The Plugin API will be of use to anyone interested in building plugins as helpers to DRY up your tests, or for release to the community.; Tools. The Online Test Suite is a live run of Chai’s test suite.CHAI HTTP - CHAI
Integration Testing. Chai HTTP provides an interface for live integration testing via superagent.To do this, you must first construct a request to an application or url. SINON.JS ASSERTIONS FOR CHAI Sinon.JS Assertions for Chai. Sinon–Chai provides a set of custom assertions for using the Sinon.JS spy, stub, and mocking framework with the Chai assertion library. You get all the benefits of Chai with all the powerful tools of Sinon.JS. Instead of using Sinon.JS’sassertions:
CHAISEE MORE ON CHAIJS.COMEXPECT / SHOULD
However, it’s dangerous to negate . property when providing val.The problem is that it creates uncertain expectations by asserting that the target either doesn’t have a property with the given key name, or that it does have a property with the given key name but its value isn’t equal to the given val.It’s often best to identify the exact output that’s expected, and then write anCHAI SPIES - CHAI
Chai Spies. This is an addon plugin for the chai assertion library. It provides the most basic function spy ability and tests. This library is primarily meant to serve as a starting point for anyone interested in developing chai plugins.CHAI-STRING
All assertions are defined for both the BDD and TDD syntax but some aliases exist to make the assertions look good with both styles. var d1 = 'abcdef', d2 = 'abc'; d1.should.startWith.d2 expect(d1).to.startsWith(d2) assert.startsWith(d1, d2)CHAI-BIGNUMBER
The following assertion methods are provided and will override the existing builtin assertions if the bignumber property is explicitly set as part of the assertion chain: The above methods have the following signature: (value, dp, rm) . Where dp is an optional argument which specifies the number of decimal places to round eachside of the
CHAICHAI ASSERTION LIBRARYAPIPLUGINSBDDCHAI HTTPINSTALLATION Chai has several interfaces that allow the developer to choose the most comfortable. The chain-capable BDD styles provide an expressive language & readable style, while the TDD assert style provides a GETTING STARTED GUIDE Chai is infinitely more powerful than what is included, limited only by what you want to achieve. The Plugin API is also intended as a way to simplify testing by providing users a way to encapsulate common assertions for repeat use. Core Plugin Concepts covers the basics of using the Chai Plugin API. Building a Helper is a walkthrough forINTRODUCTION
API Reference. The Chai API is broken down by style or task. Assertion Styles. The Expect / Should API covers the BDD assertion styles.; The Assert API covers the TDD assertion style.; Plugins. The Plugin API will be of use to anyone interested in building plugins as helpers to DRY up your tests, or for release to the community.; Tools. The Online Test Suite is a live run of Chai’s test suite.CHAI HTTP - CHAI
Integration Testing. Chai HTTP provides an interface for live integration testing via superagent.To do this, you must first construct a request to an application or url. SINON.JS ASSERTIONS FOR CHAI Sinon.JS Assertions for Chai. Sinon–Chai provides a set of custom assertions for using the Sinon.JS spy, stub, and mocking framework with the Chai assertion library. You get all the benefits of Chai with all the powerful tools of Sinon.JS. Instead of using Sinon.JS’sassertions:
CHAISEE MORE ON CHAIJS.COMEXPECT / SHOULD
However, it’s dangerous to negate . property when providing val.The problem is that it creates uncertain expectations by asserting that the target either doesn’t have a property with the given key name, or that it does have a property with the given key name but its value isn’t equal to the given val.It’s often best to identify the exact output that’s expected, and then write anCHAI SPIES - CHAI
Chai Spies. This is an addon plugin for the chai assertion library. It provides the most basic function spy ability and tests. This library is primarily meant to serve as a starting point for anyone interested in developing chai plugins.CHAI-STRING
All assertions are defined for both the BDD and TDD syntax but some aliases exist to make the assertions look good with both styles. var d1 = 'abcdef', d2 = 'abc'; d1.should.startWith.d2 expect(d1).to.startsWith(d2) assert.startsWith(d1, d2)CHAI-BIGNUMBER
The following assertion methods are provided and will override the existing builtin assertions if the bignumber property is explicitly set as part of the assertion chain: The above methods have the following signature: (value, dp, rm) . Where dp is an optional argument which specifies the number of decimal places to round eachside of the
CHAI
chai-moment-string. Validates a string to have valid date time formatwith moment
INSTALLATION
Installation. Chai is available for both node.js and the browser using any test framework you like. There are also a number of other toolsthat include Chai.
CHAI-STRING
All assertions are defined for both the BDD and TDD syntax but some aliases exist to make the assertions look good with both styles. var d1 = 'abcdef', d2 = 'abc'; d1.should.startWith.d2 expect(d1).to.startsWith(d2) assert.startsWith(d1, d2)ASSERT - CHAI
Assert. The assert style is very similar to node.js’ included assert module, with a bit of extra sugar. Of the three style options, assert is the only one that is not chainable. Check out the Style Guide for a comparison.. API ReferenceCHAI SMOOTHIE
Chai Smoothie - Protractor assertions for Chai. Chai Smoothie smooths out the sharp angles of your Protractor-powered automated web tests.. The library provides a set of custom Chai assertions to help your Protractor-based Serenity/JS tests express their intent better, give assertion errors more meaning, and reduce the amount of time your team spends troubleshooting the failures.BUILDING A HELPER
Building a Helper. This tutorial assumes that you are familiar with the plugin core concepts.If you have not yet read that article, it is recommended that you do so before continuing.CHAI MATCH - CHAI
Chai is a BDD / TDD assertion library for (http://nodejs.org) and the browser that can be delightfully paired with any javascripttesting framework.
ASSERTION STYLES
This comes in handy when being used with non-descript topics such as booleans or numbers. Should. The should style allows for the same chainable assertions as the expect interface, however it extends each object with a should property to start your chain. This style has some issues when used with Internet Explorer, so be aware of browsercompatibility.
CHAI-DOM - CHAI
chai-dom. chai-dom is an extension to the chai assertion library that provides a set of assertions when working with the DOM (specifically HTMLElement and NodeList). Forked from chai-jquery to use for those of us freed of jQuery’s baggage.. Assertions attr (name ) attribute (name ). Assert that the HTMLElement has the given attribute, using getAttribute. DEEP-EQUAL-IN-ANY-ORDER deep-equal-in-any-order. Chai plugin to match objects and arrays deep equality with arrays (including nested ones) being in any order. It works in similar way as deep. equal but it doesn’t checks the arrays order (at any level of nested objects and arrays). The array elements can be any JS entity (boolean, null, number, string, object, array). CHAI ASSERTION LIBRARY* Guide
* API
* Plugins
Chai is a BDD / TDD assertion library for node and the browser that can be delightfully paired with any javascripttesting framework.
DOWNLOAD CHAI
FOR NODE ANOTHER PLATFORM? BROWSER RAILS The chai package is available on npm. $ npm install chai View Node Guide FOR BROWSER ANOTHER PLATFORM? NODE RAILS The chai.js script is available for download or a hotlink. Download chai.js View Browser Guide FOR RAILS ANOTHER PLATFORM? NODE BROWSER Chai is available through Konacha, a modern test harness that takes full advantage of Rails 3 features such as the asset pipeline and engines. Konacha GitHub Project Issues | Fork on GitHub| Releases |
Google Group | BuildStatus
Getting StartedLearn how to install and use Chai through a series of guided walkthroughs. API DocumentationExplore the BDD & TDD language specifications for all available assertions. Plugin DirectoryExtend Chai's with additional assertions and vendorintegration.
CHAI HAS SEVERAL INTERFACES THAT ALLOW THE DEVELOPER TO CHOOSE THE MOST COMFORTABLE. THE CHAIN-CAPABLE BDD STYLES PROVIDE AN EXPRESSIVE LANGUAGE & READABLE STYLE, WHILE THE TDD ASSERT STYLE PROVIDES A MORECLASSICAL FEEL.
SHOULD
chai.should();
foo.should.be.a('string'); foo.should.equal('bar'); foo.should.have.lengthOf(3); tea.should.have.property('flavors').with.lengthOf(3);
Visit Should Guide →EXPECT
var expect = chai.expect; expect(foo).to.be.a('string'); expect(foo).to.equal('bar'); expect(foo).to.have.lengthOf(3); expect(tea).to.have.property('flavors').with.lengthOf(3);
Visit Expect Guide →ASSERT
var assert = chai.assert; assert.typeOf(foo, 'string'); assert.equal(foo, 'bar'); assert.lengthOf(foo, 3) assert.property(tea, 'flavors'); assert.lengthOf(tea.flavors, 3); Visit Assert Guide → PLUGINS EXTEND CHAI'S ASSERTIONS TO NEW CONTEXTS SUCH AS VENDOR INTEGRATION & OBJECT CONSTRUCTION. DEVELOPERS CAN BUILD THEIR OWN PLUGINS TO SHARE WITH COMMUNITY OR USE THE PLUGIN PATTERN TO DRY UPEXISTING TESTS.
CHAI-WEBDRIVER
Learn More & Install →FEATURED PLUGIN
Create expressive integration tests with chai and selenium-webdriver.
chai.use(chaiWebdriver(driver)); driver.get('http://chaijs.com/'); expect('nav h1').dom.to.contain.text('Chai'); expect('#node .button').dom.to.have.style('float', 'left');CUSTOM PLUGINS
Browse our growing directory of custom plugins & vendor integrations to find the best tool for your needs.Browse Plugins→
DEVELOP PLUGINS
Chai has an extensive utility belt for plugin developers. Learn how to build your plugins & share.Plugin Guide→
POWERED BY OPEN SOURCE Chai is hosted on GitHub. Have a suggestion or found a bug? Fork this project to help make Chai even better. Even this documentation site is open source and available for contribution. Fork Chai on GitHub→JOIN OUR COMMUNITY
We have an active mailing list available at our Google Group , or drop by freenode IRC #chaijs channel to get help anytime. Visit Google Group→ CHAI ASSERTION LIBRARY* Installation
* Interface Styles
* Developing Plugins * Expect / Should API* Assert API
* Plugin Utility API* Getting Help
* Test Suite
* Releases
* Issues
* Google Group
* Build Status
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