As of 3.0.0, the ReleaseNotes.md file has been deprecated. Please refer to the release notes available on Github. Or the release notes on the chaijs.com website.
Added ownPropertyDescriptor
assertion:
expect('test').to.have.ownPropertyDescriptor('length');
expect('test').to.have.ownPropertyDescriptor('length', { enumerable: false, configurable: false, writable: false, value: 4 });
expect('test').not.to.have.ownPropertyDescriptor('length', { enumerable: false, configurable: false, writable: false, value: 3 });
expect('test').ownPropertyDescriptor('length').to.have.property('enumerable', false);
expect('test').ownPropertyDescriptor('length').to.have.keys('value');
ownPropertyDescriptor
assertion.
By @ljharbDeep property strings can now be escaped using \\
- for example:
var deepCss = { '.link': { '[target]': 42 }};
expect(deepCss).to.have.deep.property('\\.link.\\[target\\]', 42)
A minor bug fix. No new features.
Two minor bugfixes. No new features.
deep.property
would not work with single
key names. By @eldritch-fossickerSmall release; fixes an issue where the Chai lib was incorrectly reporting the version number.
Adds new should.fail()
and expect.fail()
methods, which are convinience
methods to throw Assertion Errors.
Unfortunately with 1.10.0 - compatibility broke with older versions because of
the addChainableNoop
. This change has been reverted.
Any plugins using addChainableNoop
should cease to do so.
Any developers wishing for this behaviour can use dirty-chai by @joshperry
.keys()
now accepts Objects, extracting keys from them. By @gregglind.keys()
no longer mutates passed arrays. By @gregglind.which
. By @toastynerd.change
, .increase
and .decrease
assertions. By @cmpolischai.util
is now exposed @DingoEatingFuzz.includes
and .contains
aliases (for .include
and .contain
). By @lo1tuma.any.keys()
and .all.keys()
qualifiers. By @cjqedassert.sameDeepMembers()
. By @cjqedassert.isAbove()
and assert.isBelow()
. By @cjqedproperty
and deep.property
now pass if a value is set to undefined
. By @prodatakeyThe following changes are required if you are upgrading from the previous version:
addChainableNoop
notes below.node_modules
folder for updated dependencies.The following assertions can now also be used in the function-call form:
The above list of assertions are property getters that assert immediately on access. Because of that, they were written to be used by terminating the assertion chain with a property access.
expect(true).to.be.true;
foo.should.be.ok;
This syntax is definitely aesthetically pleasing but, if you are linting your test code, your linter will complain with an error something like "Expected an assignment or function call and instead saw an expression." Since the linter doesn't know about the property getter it assumes this line has no side-effects, and throws a warning in case you made a mistake.
Squelching these errors is not a good solution as test code is getting to be just as important as, if not more than, production code. Catching syntactical errors in tests using static analysis is a great tool to help make sure that your tests are well-defined and free of typos.
A better option was to provide a function-call form for these assertions so that the code's intent is more clear and the linters stop complaining about something looking off. This form is added in addition to the existing property access form and does not impact existing test code.
expect(true).to.be.true();
foo.should.be.ok();
These forms can also be mixed in any way, these are all functionally identical:
expect(true).to.be.true.and.not.false();
expect(true).to.be.true().and.not.false;
expect(true).to.be.true.and.not.false;
If you would like to provide this function-call form for your terminating assertion
properties, there is a new function to register these types of asserts. Instead
of using addProperty
to register terminating assertions, simply use addChainableNoop
instead; the arguments to both are identical. The latter will make the assertion
available in both the attribute and function-call forms and should have no impact
on existing users of your plugin.
-0
. @dasilvacontinThank you to all who took time to contribute!
The following changes are required if you are upgrading from the previous version:
node_modules
folder for updated dependencies.Thank you to all who took time to contribute!
The following changes are required if you are upgrading from the previous version:
node_modules
folder for updated dependencies.There have been requests for changes and additions to the configuration mechanisms
and their impact in the Chai architecture. As such, we have decoupled the
configuration from the Assertion
constructor. This not only allows for centralized
configuration, but will allow us to shift the responsibility from the Assertion
constructor to the assert
interface in future releases.
These changes have been implemented in a non-breaking way, but a depretiation
warning will be presented to users until they migrate. The old config method will
be removed in either v1.11.0
or v2.0.0
, whichever comes first.
// change this:
chai.Assertion.includeStack = true;
chai.Assertion.showDiff = false;
// ... to this:
chai.config.includeStack = true;
chai.config.showDiff = false;
User configurable property, influences whether stack trace is included in
Assertion error message. Default of false
suppresses stack trace in the error
message.
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.
User configurable property, sets length threshold for actual and expected values in assertion errors. If this threshold is exceeded, the value is truncated.
Set it to zero if you want to disable truncating altogether.
chai.config.truncateThreshold = 0; // disable truncating
contain
/include
1.9.0 regression. @leiderssfi
for assert
interface. @refackThank you to all who took time to contribute!
undefined
for actual. (internal api)The following changes are required if you are upgrading from the previous version:
node_modules
folder for updated dependencies.--watch
. @demandshas
to language chains. @duncanbeevers{a:1,b:2}.should.include({a:1})
@jkrosoThank you to all who took time to contribute!
component(1)
.assert.throws()
returns thrown error for further assertions.The following changes are required if you are upgrading from the previous version:
node_modules
folder for updated dependencies.node_modules
folder for updated dependencies.This is a small patch that updates the dependency tree so browserify users can install chai. (Remove conditional requires)
The following changes are required if you are upgrading from the previous version:
deep.equal
notes.node_modules
folder for updated dependencies.This version of Chai focused on a overhaul to the deep equal utility. The code for this tool has been removed from the core lib and can now be found at: chai / deep-eql. As stated in previous releases, this is part of a larger initiative to provide transparency, independent testing, and coverage for some of the more complicated internal tools.
For the most part .deep.equal
will behave the same as it has. However, in order to provide a
consistent ruleset across all types being tested, the following changes have been made and might
require changes to your tests.
1. Strict equality for non-traversable nodes according to egal.
Previously: Non-traversable equal via ===
.
expect(NaN).to.deep.equal(NaN);
expect(-0).to.not.deep.equal(+0);
2. Arguments are not Arrays (and all types must be equal):
Previously: Some crazy nonsense that led to empty arrays deep equaling empty objects deep equaling dates.
expect(arguments).to.not.deep.equal([]);
expect(Array.prototype.slice.call(arguments)).to.deep.equal([]);
Chai now runs the browser CI suite using Karma directed at SauceLabs. This means we get to know where our browser support stands... and we get a cool badge:
Look for the list of browsers/versions to expand over the coming releases.
The following changes are required if you are upgrading from the previous version:
node_modules
folder for updated dependencies.Coverage reporting has always been available for core-developers but the data has never been published for our end users. In our ongoing effort to improve accountability this data will now be published via the coveralls.io service. A badge has been added to the README and the full report can be viewed online at the chai coveralls project. Furthermore, PRs will receive automated messages indicating how their PR impacts test coverage. This service is tied to TravisCI.
bower.json
. (Fix ignore all)The following changes are required if you are upgrading from the previous version:
node_modules
folder for updated dependencies.Support has been added for the Bower Package Manager ([bower.io])(http://bower.io/). Though
Chai could be installed via Bower in the past, this update adds official support via the bower.json
specification file.
bower.json
.The following changes are required if you are upgrading from the previous version:
node_modules
folder for updated dependencies.Chai now uses chaijs/assertion-error instead an internal constructor. This will allow for further iteration/experimentation of the AssertionError constructor independant of Chai. Future plans include stack parsing for callsite support.
This update constructor has a different constructor param signature that conforms more with the standard
Error
object. If your plugin throws and AssertionError
directly you will need to update your plugin
with the new signature.
var AssertionError = require('chai').AssertionError;
/**
* previous
*
* @param {Object} options
*/
throw new AssertionError({
message: 'An assertion error occurred'
, actual: actual
, expect: expect
, startStackFunction: arguments.callee
, showStack: true
});
/**
* new
*
* @param {String} message
* @param {Object} options
* @param {Function} start stack function
*/
throw new AssertionError('An assertion error occurred', {
actual: actual
, expect: expect
, showStack: true
}, arguments.callee);
// other signatures
throw new AssertionError('An assertion error occurred');
throw new AssertionError('An assertion error occurred', null, arguments.callee);
This is the first non-developement dependency for Chai. As Chai continues to evolve we will begin adding more; the next will likely be improved type detection and deep equality. With Chai's userbase continually growing there is an higher need for accountability and documentation. External dependencies will allow us to iterate and test on features independent from our interfaces.
Note: The browser packaged version chai.js
will ALWAYS contain all dependencies needed to run Chai.
assert.notOk()
. @Bartvdsinspect
utility. @domenicThank you to all who took the time to contribute!
The following changes are required if you are upgrading from the previous version:
node_modules
folder for updated developement dependencies.Regular Expressions are now tested as part of all deep equality assertions. In previous versions they silently passed for all scenarios. Thanks to @katsgeorgeek for the contribution.
Thank you to all who took the time to contribute!
1.8.x
to ensure mocha-phantomjs
compatibility.The following changes are required if you are upgrading from the previous version:
node_modules
folder for updated developement dependencies.Asserts that the target is a superset of set
, or that the target and set
have the same members.
Order is not taken into account. Thanks to @NickHeiner for the contribution.
// (expect/should) full set
expect([4, 2]).to.have.members([2, 4]);
expect([5, 2]).to.not.have.members([5, 2, 1]);
// (expect/should) inclusion
expect([1, 2, 3]).to.include.members([3, 2]);
expect([1, 2, 3]).to.not.include.members([3, 2, 8]);
// (assert) full set
assert.sameMembers([ 1, 2, 3 ], [ 2, 1, 3 ], 'same members');
// (assert) inclusion
assert.includeMembers([ 1, 2, 3 ], [ 2, 1 ], 'include members');
Most assert
functions have a negative version, like instanceOf()
has a corresponding notInstaceOf()
.
However include()
did not have a corresponding notInclude()
. This has been added.
assert.notInclude([ 1, 2, 3 ], 8);
assert.notInclude('foobar', 'baz');
call
/apply
methods for plugin interface. @RubenVerborghmembers
and include.members
assertions. #NickHeinerThank you to all who took time to contribute!
assert#include
will no longer silently pass on wrong-type haystack.assert#notInclude
has been added.v0.10.x
. Support for v0.6.x
has been removed. v0.8.x
is still tested as before.The following changes are required if you are upgrading from the previous version:
node_modules
folder for updated developement dependencies.eqls
alias for eql
. @RubenVerborgh.throw
support for primitives. @RubenVerborgh.throw
support for empty messages. @timnew.above()
and .below()
. @whatthejeffThank you to all who took time to contribute!
.a()
/.an()
to work in cross-browser scenarios..throw()
has cleaner display of errors when WebKit browsers..eql()
now works to compare dom nodes in browsers.1. Component Support: Chai now included the proper configuration to be installed as a component. Component users are encouraged to consult chaijs.com for the latest version number as using the master branch does not gaurantee stability.
// relevant component.json
devDependencies: {
"chaijs/chai": "1.5.0"
}
Alternatively, bleeding-edge is available:
$ component install chaijs/chai
2. Configurable showDiff: Some test runners (such as mocha) include support for showing the diff of strings and objects when an equality error occurs. Chai has already included support for this, however some users may not prefer this display behavior. To revert to no diff display, the following configuration is available:
chai.Assertion.showDiff = false; // diff output disabled
chai.Assertion.showDiff = true; // default, diff output enabled
1. New Utility - type: The new utility .type()
is available as a better implementation of typeof
that can be used cross-browser. It handles the inconsistencies of Array, null
, and undefined
detection.
chai.use(function (c, utils) {
// some examples
utils.type({}); // 'object'
utils.type(null); // `null'
utils.type(undefined); // `undefined`
utils.type([]); // `array`
});
1. Browser Testing: Browser testing of the ./chai.js
file is now available in the command line
via PhantomJS. make test
and Travis-CI will now also rebuild and test ./chai.js
. Consequently, all
pull requests will now be browser tested in this way.
Note: Contributors opening pull requests should still NOT include the browser build.
2. SauceLabs Testing: Early SauceLab support has been enabled with the file ./support/mocha-cloud.js
.
Those interested in trying it out should create a free Open Sauce account
and include their credentials in ./test/auth/sauce.json
.