Release History

v4.3.7

Version v4.3.7

What’s Changed

  • fix: deep-eql bump package to support symbols comparison by @snewcomer in https://github.com/chaijs/chai/pull/1483

Full Changelog: https://github.com/chaijs/chai/compare/v4.3.6…v4.3.7

Version v4.3.6

Update loupe to 2.3.1

Version v4.3.5

  • build chaijs fca5bb1
  • build(deps-dev): bump codecov from 3.1.0 to 3.7.1 (#1446) 747eb4e
  • fix package.json exports 022c2fa
  • fix: package.json - deprecation warning on exports field (#1400) 5276af6
  • feat: use chaijs/loupe for inspection (#1401) (#1407) c8a4e00

https://github.com/chaijs/chai/compare/v4.3.4…v4.3.5

Version v4.3.4

This fixes broken inspect behavior with bigints (#1321) (#1383) thanks @vapier

4.3.3 / 2021-03-03

Version 4.3.3

This reintroduces Assertion as an export in the mjs file. See https://github.com/chaijs/chai/pull/1378 & https://github.com/chaijs/chai/issues/1375

4.3.2 / 2021-03-03

Version 4.3.2

This fixes a regression in IE11. See https://github.com/chaijs/chai/pull/1380 & https://github.com/chaijs/chai/issues/1379

4.3.1 / 2021-03-02

Version 4.3.1

This releases fixed an engine incompatibility with 4.3.0

The 4.x.x series of releases will be compatible with Node 4.0. Please report any errors found in Node 4 as bugs, and they will be fixed.

The 5.x.x series, when released, will drop support for Node 4.0

This fix also ensures pathval is updated to 1.1.1 to fix CVE-2020-7751

4.3.0 / 2021-02-04

Version 4.3.0

This is a minor release.

Not many changes have got in since the last release but this one contains a very important change (#1257) which will allow jest users to get better diffs. From this release onwards, jest users will be able to see which operator was used in their diffs. The operator is a property of the AssertionError thrown when assertions fail. This flag indicates what kind of comparison was made.

This is also an important change for plugin maintainers. Plugin maintainers will now have access to the operator flag, which they can have access to through an util method called getOperator`.

Thanks to all the amazing people that contributed to this release.

New Features

  • Allow contain.oneOf to take an array of possible values (@voliva)
  • Adding operator attribute to assertion error (#1257) (@rpgeeganage)
  • The closeTo error message will now inform the user when a delta is required (@eouw0o83hf)

Docs

  • Add contains flag to oneOf documentation (@voliva)

Tests

  • Make sure that useProxy config is checked in overwriteProperty (@vieiralucas)
  • Add tests for contain.oneOf (@voliva )

Chores

  • Update mocha to version 6.1.4
  • Add node v10 and v12 to ci (@vieiralucas)
  • Drop support for node v4, v6 and v9 (@vieiralucas)
  • Fix sauce config for headless chrome (@meeber)
  • Update dev dependencies (@meeber)
  • Removed phantomjs dependency (#1204)

4.2.0 / 2018-09-25

Version 4.2.0

This is a minor release. Thank you to all of our contributors and users!

New Features

  • feat(assertions): add ‘still’ language chain (#1194; @ScottRudiger)
  • .lengthOf for Maps and Sets (#1110, #1131; @asbish)
  • feat: Add the assert.fail([message]) interface (#1116, #1117; @s-leroux)

Bug Fixes

  • fix: remove Chai frames from .deep.equal stack (#1124; @meeber)
  • add ‘catch’ keyword to proxyExcludedKeys (#1050, #1101; @generalandrew)
  • property assertion should only accept strings if nested (#1043, #1044; @solodynamo)
  • fix: Make tests pass with --use_strict (#1034, #1040; @shvaikalesh)

Performance

  • perf: Optimize proxify and stringDistance (#1098; @sophiebits)
  • fix: Avoid repeated String#slice calls in stringDistance (#1095; @bmeurer)

Style

  • Fix typos and remove trailing whitespaces (#1042; @simonewebdesign)
  • Remove unnecessary code (#1049; @abetomo)
  • Fix variable declaration (#1048; @abetomo)

Tests

  • test(assert): increase coverage (#1084, #1085; @brutalcrozt)
  • test: stop modifying globals in Proxy tests (#1144; @meeber)

Docs

  • Fix unbalanced quotes in assert.notInclude example (#1200; @haykam821)
  • docs: fix bad .string example (#1156, #1157; @meeber)
  • fixed package npm url (#1151; @wadie)
  • Spelling (#1145; @jsoref)
  • docs: corrected spelling (#1141; @Powell-v2)
  • docs: fix wrong .property chaining examples (https://github.com/chaijs/chai/issues/193#issuecomment-360334369, #1130; @meeber)
  • docs: improve throws examples (#1113; @ColinEberhardt)
  • Fix typos (#1107; @tbroadley)
  • docs: correct .ok description (#1047; @shvaikalesh)

Chores

  • chore: update package-lock.json (#1198; @meeber)
  • Update mocha to the latest version (#1127)
  • chore: update dependencies (#1157; @meeber)
  • Update browserify to the latest version (#1135)
  • chore: update Node versions in Travis config (#1126; @meeber)
  • chore: remove Opera from Sauce config (#1125; @meeber)
  • chore: update dependencies (#1118; @meeber)
  • chore: update dependencies (#1074; @meeber)
  • Chore: change coverage service (coverall to codecov) (#927, #1073; @brutalcrozt)
  • chore: add package-lock.json (#1013; @meeber)

4.1.2 / 2017-08-31

Version 4.1.2

This release fixes a bug when running in certain environments, and includes a few minor documentation fixes.

Bug Fixes

  • fix: update deep-eql to version 3.0.0 (#1020)
  • fix: replace code causing breakage under strict CSP (#1032; @Alhadis)

Docs

  • docs: add missing assert parameters (#1017, #1023; @Hpauric)
  • docs: update year in license file (#1025; @yanca018)

4.1.1 / 2017-08-05

Version 4.1.1

This release includes a few bug and documentation fixes.

Bug Fixes

  • fix: .instanceof to allow DOM interfaces in IE11 (#1000, #1008; @meeber)
  • fix: .include to work with all objects (#1009, #1012; @meeber)

Docs

  • fix: correct hasAnyKeys comment error (#1014; @zenHeart)
  • docs: re-indent hasAnyKeys code (#1016; @keithamus)

4.1.0 / 2017-07-11

Version 4.1.0

This release includes one new feature and a few bug fixes.

New Features

  • Add ES6 collection support to include() (#970, #994; @shvaikalesh)

Bug Fixes

  • Allow dates for isBelow and isAbove assertions (#980, #990; @v1adko)
  • fix: check target’s type in .property assertion (#992; @meeber)

Chores

  • Add a missing var keyword found by lgtm.com (#988; @samlanning)
  • refactor: expectTypes to access ssfi flag (#993; @meeber)
  • Create CODEOWNERS (#1004; @keithamus)

4.0.2 / 2017-06-05

Version 4.0.2

We have another bugfix release, addressing some issues for WebPack 1 users.

Bug Fixes

  • Revert getting version information from package.json, some bundler tools like Webpack do not come default with json loaders despite Node being able to handle this. This change moves back to hardcoding the version number in the codebase. (#985, #986)

4.0.1 / 2017-05-31

Version 4.0.1

4.0.1

Of course, any major release cannot go without a quick bugfix release shortly after - and here’s ours!

Bug Fixes

  • Remove package.json browser field which was mistakenly added, and caused bundler tools like Browserify or Webpack to fail as it attempted to rebundle an already bundled file. (#978, #982)

4.0.0 / 2017-05-26

Version 4.0.0

4.0.0

4.0 has been a huge undertaking by the chai community! A lot has changed to ensure Chai 4 is a stable, reliable, well documented codebase. Here are just some of the major improvements:

  • almost all documentation has been rewritten, with detailed instructions on how assertions work, which flags they can be combined with and the best practices for how to use them.

  • deep equality has been rewritten from the ground up to support ES6 types like Map and Set, and better support existing types. It is now also much, much faster than before and allows us to bring some great improvements in upcoming releases.

  • we have made sure the deep flag now only ever does deep equality. Beforehand, it would sometimes also be used to test nested properties (for example expect(foo).to.have.deep.property('bar.baz'). For nested assertions, please now use the .nested flag.

  • many assertions have become more strict, which means you get better error messages explaining where things have gone wrong. For the most part, this wont mean error messages where there weren’t error messages before, but it will mean better error messages to replace the, sometimes cryptic, default TypeError messages.

  • we’ve added detections and helpful error messages for common mistakes and typos. The error messages will, in some cases, point you to documentation or in other cases suggest alternatives. These messages will continue to be improved in future releases, so let us know if you have any suggestions!

Breaking Changes

  • We no longer support Node v0.10 and v0.12 (since their LTS has ended) (PRs: #816, #901)
  • Instead of allowing the user to write the path of a property, now the deep flag performs a deep equality comparison when used with the .property assertion. If you want the old behavior of using the dot or bracket notation to denote the property you want to assert against you can use the new .nested flag. (Related Issues: #745, #743, PRs: #758, #757)

    const obj = {a: 1};
    
    // The `.deep` flag now does deep equality comparisons
    expect({foo: obj}).to.have.deep.property('foo', {a: 1});
    
    // Use the `nested` flag if you want to assert against a nested property using the bracket or dot notation
    expect({foo: obj}).to.have.nested.property('foo.a', 1);
    
    // You can also use both flags combined
    const obj2 = {a: {b: 2}};
    expect({foo: obj2}).to.have.deep.nested.property('foo.a', {b: 2});
    

    Please notice that the old methods which used the old behavior of the deep flag on the assert interface have been renamed. They all have had the deep word changed by the nested word. If you want to know more about this please take a look at #757.

  • Previously, expect(obj).not.property(name, val) would throw an Error if obj didn’t have a property named name. This change causes the assertion to pass instead. The assert.propertyNotVal and assert.deepPropertyNotVal assertions were renamed to assert.notPropertyVal and assert.notDeepPropertyVal, respectively. (Related Issues: #16, #743, #758)

  • You can now use the deep flag for the .include assertion in order to perform a deep equality check to see if something is included on the target. Previously, .include was using strict equality (===) for non-negated property inclusion, but deep equality for negated property inclusion and array inclusion. This change causes the .include assertion to always use strict equality unless the deep flag is set. Please take a look at this comment if you want to know more about it. (Related Issues: #743, PRs: #760, #761)

    const obj = {a: 1};
    expect([obj]).to.deep.include({a:1});
    expect({foo: obj}).to.deep.include({foo: {a:1}});
    
  • Fix unstable behavior of the NaN assertion. Now we use the suggested ES6 implementation. The new implementation is now more correct, strict and simple. While the old one threw false positives, the new implementation only checks if something is NaN (or not if the .not flag is used) and nothing else. (Related Issues: #498, #682, #681, PRs: #508)

    // Only `NaN` will be considered to be `NaN` and nothing else
    expect(NaN).to.be.NaN;
    
    // Anything that is not `NaN` cannot be considered as `NaN`
    expect('randomString').not.to.be.NaN;
    expect(true).not.to.be.NaN;
    expect({}).not.to.be.NaN;
    expect(4).not.to.be.NaN;
    
  • The Typed Array types are now truncated if they’re too long (in this case, if they exceed the truncateThreshold value on the config). (Related Issues: #441, PRs: #576)

    var arr = [];
    for (var i = 1; i <= 1000; i++) {
      arr.push(i);
    }
    
    // The assertion below will truncate the diff shown and the enormous typed array will be shown as:
    // [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, ...  ] instead of printing the whole typed array
    chai.expect(new Float32Array(100)).to.equal(1);
    
  • The assertions: within, above, least, below, most, increase, decrease will throw an error if the assertion’s target or arguments are not numbers. (Related Issues: #691, PRs: #692, #796)

    // These will throw errors, for example:
    expect(null).to.be.within(0, 1);
    expect(null).to.be.above(10);
    expect(null).to.be.at.least(20);
    expect(null).to.be.below(20);
    expect(null).to.be.at.most(20);
    expect(null).to.increase.by(20);
    expect(null).to.decrease.by(20);
    
    // This will not:
    expect('string').to.have.a.lengthOf.at.least(3);
    
  • Previously, expect(obj).not.ownProperty(name, val) would throw an Error if obj didn’t have an own property (non-inherited) named name. This change causes the assertion to pass instead. (Related Issues: #795, #, PRs: #744, #810)*

    expect({ foo: 'baz' }).to.not.have.own.property('quux', 'baz');
    
  • The .empty assertion will now throw when it is passed non-string primitives and functions (PRs: #763, #812)

    // These will throw TypeErrors:
    expect(Symbol()).to.be.empty;
    expect(function() {}).to.be.empty;
    expect(true).to.be.empty;
    expect(1).to.be.empty
    
  • Assertion subject (obj) changes when using ownProperty or own.property and thus enables chaining. (Related Issues: #281, PRs: #641)

    expect({val: 20}).to.have.own.property('val').above(10);
    
  • The .change, .increase, and .decrease assertions changed from chainable method assertions to method assertions. They don’t have any chaining behavior, and there’s no generic semantic benefit to chaining them. (Related Issues: #917, PRs: #925)
// This will not work anymore because there is no benefit to chaining these assertions:
expect(function() {}).to.change.by(2)
expect(function() {}).to.increase.by(2)
expect(function() {}).to.decrease.by(2)
  • The utils (second argument passed to the chai.use callback function) no longer exports the getPathValue function. If you want to use that please use the pathval module, which is what chai uses internally now. (Related Issues: #457, #737, PRs: #830)

  • (For plugin authors) Throw when calling _superon overwriteMethodif the method being overwritten is undefined. Currently if the method you are trying to overwrite is not defined and your new method calls _super it will throw an Error.(Related Issues: #467, PRs: #528) Before this change, calling _super would simply return this.

    // Considering the method `imaginaryMethod` does not exist, this would throw an error for example:
    chai.use(function (chai, utilities) {
      chai.Assertion.overwriteMethod('imaginaryMethod', function (_super) {
        return function () {
          _super.apply(this, arguments);
        }
      });
    });
    
    // This will throw an error since you are calling `_super` which should be a method (in this case, the overwritten assertion) that does not exist
    expect('anything').to.imaginaryMethod(); 
    
  • (For plugin authors) Now showDiff is turned on by default whenever the showDiff flag is anything other than false. This issue will mostly affect plugin creators or anyone that made extensions to the core, since this affects the Assertion.assert method. (Related Issues: #574, PRs: #515)

    // Now whenever you call `Assertion.assert` with anything that is not false for the `showDiff` flag it will be true
    // The assertion error that was thrown will have the `showDiff` flag turned on since it was not passed to the `assert` method
    try {
      new chai.Assertion().assert(
          'one' === 'two'
        , 'expected #{this} to equal #{exp}'
        , 'expected #{this} to not equal #{act}'
        , 'one'
        , 'two'
      );
    } catch(e) {
      assert.isTrue(e.showDiff);
    }
    
    // The assertion error that was thrown will have the `showDiff` flag turned off since here we passed `false` explicitly
    try {
      new chai.Assertion().assert(
          'one' === 'two'
        , 'expected #{this} to equal #{exp}'
        , 'expected #{this} to not equal #{act}'
        , 'one'
        , 'two'
        , false
      );
    } catch(e) {
      assert.isFalse(e.showDiff);
    }
    

New Features

  • Throw when non-existent property is read. (Related Issues: #407, #766 PRs: #721, #770) This is a potentially breaking change. Your build will fail if you have typos in your property assertions Before 4.x.x when using property assertions they would not throw an error if you wrote it incorrectly. The example below, for example, would pass:

    expect(true).to.be.ture; // Oops, typo, now Chai will throw an Error
    

    Since this implementation depends on ES6 Proxies it will only work on platforms that support it.

    This property can be enabled (default) or disabled through the config.useProxy property, for example:

    chai.config.useProxy = false;  // disable use of Proxy
    
  • Add fix suggestions when accessing a nonexistent property in proxy mode. (Related Issues: #771, PRs: #782) When a nonexistent property is accessed in proxy mode, Chai will compute the levenshtein distance to all possible properties in order to suggest the best fix to the user.

    expect(false).to.be.fals; // Error: Invalid Chai property: fals. Did you mean "false"?
    expect('foo').to.be.undefind; // Error: Invalid Chai property: undefind. Did you mean "undefined"?
    
    // If the Levenshtein distance between the word and any Chai property is greater than 4, no fix will be suggested
    expect('foo').to.be.fdsakfdsafsagsadgagsdfasf // error thrown, no fix suggested
    
  • When non-chainable methods (including overwritten non-chainable methods) are used incorrectly an error will be thrown with a helpful error message. (PRs: #789)

    expect(true).to.equal.true;  // Invalid Chai property: equal.true. See docs for proper usage of "equal".
    
  • Add a new configuration setting that describes which keys will be ignored when checking for non-existing properties on an assertion before throwing an error. Since this implementation depends on ES6 Proxies it will only work on platforms that support it. Also, if you disable config.useProxy, this setting will have no effect. (Related Issues: #765, PRs: #774)

    chai.config.proxyExcludedKeys.push('nonExistingProp');
    
    expect('my string').to.nonExistingProp; // This won't throw an error now
    
  • Add script that registers should as a side-effect. (Related Issues: #594, #693 PRs: #604)

    // You can now write:
    import 'chai/should';
    
    // as opposed to:
    import {should} from 'chai';
    should();
    

    You can also register should via a mocha option: mocha --require chai/should.

  • The change assertion accepts a function as object. (Related Issues: #544, PRs: #607)

    // Now you can also check if the return value of a function changes, for example
    assert.increases(
      someOperation,
      () => getSomething().length
    )
    
  • You can also assert for a delta using the by assertion alongside the change, increase and decrease assertions. (Related Issues: #339, PRs: #621)

  // You can use `.by` to assert the amount you want something to change
  var obj = { val: 10 };
  var increaseByTwo = function() { obj.val += 2 };
  var decreaseByTwo = function() { obj.val -= 2 };
  var increaseByThree = function() { obj.val += 3 };

  expect(increaseByThree).to.change(obj, 'val').by(3);
  expect(increaseByTwo).to.increase(obj, 'val').by(2);
  expect(decreaseByTwo).to.decrease(obj, 'val').by(2);

  // Please notice that if you want to assert something did change but not by some amount you need to use `.not` **after** the `change` related assertion
  // Take a look at the examples below:
  expect(increaseByThree).to.change(obj, 'val').but.not.by(5)
  expect(increaseByTwo).to.increase(obj, 'val').but.not.by(1)
  expect(decreaseByTwo).to.decrease(obj, 'val').but.not.by(1)
  • The .keys assertion can now operate on maps and sets. (Related Issues: #632, PRs: #633, #668)
  // The `.keys` assertion now works on `map`s and `set`s natively, like the examples below:
  expect(new Map([[{objKey: 'value'}, 'value'], [1, 2]])).to.contain.key({objKey: 'value'});
  expect(new Map([[{objKey: 'value'}, 'value'], [1, 2]])).to.contain.any.keys([{objKey: 'value'}, {anotherKey: 'anotherValue'}]);
  expect(new Map([['firstKey', 'firstValue'], [1, 2]])).to.contain.all.keys('firstKey', 1);
  expect(new Set([['foo', 'bar'], ['example', 1]])).to.have.any.keys('foo');

  // You can also use `.deep` when asserting agains `Map`s and `Set`s
  expect(new Map([[{objKey: 'value'}, 'value'], [1, 2]])).to.contain.any.deep.keys([{objKey: 'value'}, {anotherKey: 'anotherValue'}]);
  expect(new Map([['firstKey', 'firstValue'], [1, 2]])).to.contain.all.deep.keys('firstKey', 1);
  expect(new Set([['foo', 'bar'], ['example', 1]])).to.have.any.deep.keys('foo');
  • Add compatibility with strict mode. (Related Issues: #578, PRs: #665)

    // This means you can now run your code with the `--use_strict` flag on Node
    // If want to understand more about this please read the issue related to this change
    
  • Add does and but as new no-op assertion. (Related Issues: #700, #339 PRs: #621, #701)

    // You can now write assertions forming phrases with these two new words:
    expect(increaseByThree).to.change(obj, 'val').but.not.by(5);
    expect(foobar).to.have.property("baz").which.does.not.have.property("thing");
    
  • Allow use to be imported using new ES6 module syntax. (Related Issues: #718, PRs: #724)

    // You can now import `use` using the ES6 module syntax, like the example below:
    import sinonChai from "sinon-chai";
    import {expect, use} from "chai";
    
    use(sinonChai);
    

    You can also use require alongside the new ES6 destructuring feature:

    const sinonChai = require('sinon-chai');
    const {expect, use} = require("chai");
    
    use(sinonChai);
    
  • Add ordered flag for members assertion. (Related Issues: #717, PRs: #728)

    // You can now use the `ordered` flag to assert the order of elements when using the `members` assertion:
    expect([1, 2, 3]).to.include.ordered.members([1, 2]); // This passes
    expect([1, 2, 3]).to.include.ordered.members([2, 3]); // This will fail! Read the docs to know more.
    
  • Add .own flag to .property assertion. It does the same thing as .ownProperty and cannot be used alongisde the new .nested flag. (Related Issues: #795, PRs: #810)

    expect({a: 1}).to.have.own.property('a');
    
    // The example below will thrown an Error
    expect({a: {b: 1}}).to.have.own.nested.property('a.b', 1);
    
  • Add .deep support to .property assertion. (Related Issues: #795, PRs: #810)

    expect({ foo: { bar: 'baz' } }).to.have.deep.own.property('foo', { bar: 'baz' });
    expect({ foo: { bar: { baz: 'quux' } } }).to.have.deep.nested.property('foo.bar', { baz: 'quux' });
    
  • The .empty assertion will now work with ES6 collections (PRs: #763, #812, #814) Please notice that this assertion will throw an error when it is passed a WeakMap or WeakSet.

    expect(new Set()).to.be.empty;
    expect(new Map()).to.be.empty;
    
    // The examples below will throw a TypeError:
    expect(new WeakSet()).to.be.empty;
    expect(new WeakMap()).to.be.empty;
    
  • Add script that registers should as a side-effect. This change allows you to register should via a mocha option by using: mocha spec.js -r chai/register-should and also allows you to register the testing style globally. (Issues: #693, PRs: #868)

    require('chai/register-should');  // Using Should style
    
  • Add script that registers assert as a side-effect. This change allows you to register assert via a mocha option by using: mocha spec.js -r chai/register-assert (Issues: #693, PRs: #868, #872)

 require('chai/register-assert');  // Using Assert style
  • Add script that registers expect as a side-effect. This change allows you to register expect via a mocha option by using: mocha spec.js -r chai/register-expect (Issues: #693, PRs: #868, #872)

    require('chai/register-expect');  // Using Expect style
    
  • When the length assertion is chained directly off of an uninvoked method, it references function’s built-in length property instead of Chai’s length assertion. This commit adds a guard to Chai methods to detect this problem and throw a helpful error message that advises the user on how to correct it. (Issues: #684, #841, PRs: #897)

  • Allows the lockSsfi flag to be set when creating new Assertion. 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. (Issues: #878, #904, PRs: #922)

    // This will lock the stack stack function from this line on
    // The SSFI is the reference to the starting point for removing irrelevant frames from the stack trace
    new Assertion(obj, msg, ssfi, true).to.have.property('length')
    
  • The nestedInclude, deepNestedInclude, ownInclude and deepOwnInclude assertions and there negated pairs were added to the assert interface. (Issues: #905, PRs: #964)

    // '[]' and '.' in property names can be escaped using double backslashes.
    
    assert.nestedInclude({'.a': {'b': 'x'}}, {'\\.a.[b]': 'x'});
    assert.notNestedInclude({'.a': {'b': 'x'}}, {'\\.a.b': 'y'});
    
    assert.deepNestedInclude({a: {b: [{x: 1}]}}, {'a.b[0]': {x: 1}});
    assert.notDeepNestedInclude({a: {b: [{x: 1}]}}, {'a.b[0]': {y: 1}});
    
    assert.ownInclude({ a: 1 }, { a: 1 });
    assert.notOwnInclude({ a: 1 }, { b: 2 });
    
    assert.deepOwnInclude({a: {b: 2}}, {a: {b: 2}});
    assert.notDeepOwnInclude({a: {b: 2}}, {a: {c: 3}});
    

Bug Fixes

  • Fix missing msg argument for change related assertions. (Related Issues: None, PRs: #606)
  • The addMethod function returns a new assertion with flags copied over instead of this. (Related Issues: #562, #684, #723, PRs: #642, #660)
  • Fix stacktraces for overwritten properties and methods. (Related Issues: #659, #661)
  • Fix bug when testing Symbol equality with should syntax. (Related Issues: #669, PRs: #672)
  • Fix bug when asserting some valid ES6 keys. (Related Issues: #674, PRs: #676)
  • Fix bug caused when custom inspect method is used and this method calls stylize. (PRs: #680)
  • Fix ownProperty on objects with no prototype. (Related Issues: #688, PRs: #689)
  • Fix swapped expected and actual results for the .members assertion. (Related Issues: #511, PRs: #702)
  • Fix same.members to properly handle duplicates by treating each one as a unique member. (Related Issues: #590, PRs: #739)
  • Fix deep.have.same.members() that was not printing a diff. (PRs: #509)
  • Diff will be shown for assert’s equal and notEqual methods. (Related Issues: #790, PRs: #794)
  • The overwriteMethod, overwriteProperty, addChainableMethod, overwriteChainableMethod functions will return new assertion with flags copied over instead of this. (Related Issues: #562, #642, #791, PRs: #799)
  • Proxy-related implementation frames were showing up in the stack traces for failed property assertions. Now we remove them by setting the proxy getter (instead of the property getter) as the starting point to remove all implementation frames. (PRs: #884)
  • Negated keys assertions will now consider size of sets. (Related Issues: #919, PRs: #924)
  • Whenever passed something that is not an instance of a function, the instanceof assertion will now throw an error informing the user that he should pass a constructor to this assertion, but instead he has passed . _(Related Issues: #893, PRs: #924)_
  • Fix all issues on expect/should interfaces that were causing implementation frames to leak through. Also improve the internal Chai error test helper to validate stack traces. (Issues: #878, #904, PRs: #922)
  • This fixes custom messages not always being respected. (Issues: #922, #947, #904, PRs: #916, #923)
  • Fix PhantomJS 1.x incompatibility (Issues: #966, PRs: #890)

4.0.0-canary.2 / 2017-04-17

Version 4.0.0-canary.2

4.0.0-canary.2 / 2017-04-17

The second release in the 4.0.0 canary release cycle. Around the end of April, barring any showstopper bugs, this will be released as 4.0.0

Breaking Changes

  • We’ve dropped support for Node 0.10 (See #816) and Node 0.12 (#901). The minimum supported version is now Node 4.0. If you wish to continue using older versions of Node with Chai, please continue to use the 3.5.0 release. Officially, version 4.0.0 of chai supports Nodes 4, 6, 7, as well as the moving LTS version (currently 6.10.2). We plan to support Node 4 until at-least April 2018 (inline with Node Foundation support).

  • .not.keys on its own is now the equivalent of .not.all.keys (#924). The docs mention this, and suggest to always pair .keys with something.

New Features

  • Added side-effectful “register” style scripts for each interface, (See #868). This allows one to require('chai/should') which will automatically call global.should = chai.should(). This is useful for users who wish to automatically get a global for their codebase. Read the docs for more info!

  • Added the browser field to the package json (#875). This will help with browser bundling tools.

  • Added .own.include and .nested.include (#926).

  • If you attempt to call .throws with something that isn’t a constructor (like TypeError) you will now get a more helpful error message about this. (before it would say Right-hand side of 'instanceof' is not an object, now it says The instanceof assertion needs a constructor but <type> was given). (#899).

Bug Fixes

  • Minor update deep-eql to 2.0.1 (#871) which fixes bugs around Memoization, and lets comparators override evaluation of primitives.

  • We’ve updated documentation and error handling around using .length (#897) - which can, in some cases, be problematic. Typically, you’ll want to use .lengthOf instead - but the documentation now makes this clear, and errors are more helpful when bad things happen.

  • We’ve improved stack traces to strip out chai’s internals, especially in newer environments which use Proxies (#884 and #922).

  • We’ve gone through and made sure every assertion honors the custom error message you pass it - some didn’t! (#947).

  • getFuncName has had an update since we pulled out the behaviour in 4.0.0-canary.1 (#915). Practically this doesn’t change anything in Chai.

Documentation

  • Added LICENSE file (#854)
  • Major documentation rewrite including the plugin docs (#911), .throw docs (#866), and, well, just about all other docs (#920). These docs are far more detailed now, explaining caveats, algorithms and best practices.

4.0.0-canary.1

Version 4.0.0-canary.1

4.0.0-canary.1

Breaking Changes

  • Instead of allowing the user to write the path of a property, now the deep flag performs a deep equality comparison when used with the .property assertion. If you want the old behavior of using the dot or bracket notation to denote the property you want to assert against you can use the new .nested flag. (Related Issues: #745, #743, PRs: #758, #757)

    const obj = {a: 1};
      
    // The `.deep` flag now does deep equality comparisons
    expect({foo: obj}).to.have.deep.property('foo', {a: 1});
      
    // Use the `nested` flag if you want to assert against a nested property using the bracket or dot notation
    expect({foo: obj}).to.have.nested.property('foo.a', 1);
      
    // You can also use both flags combined
    const obj2 = {a: {b: 2}};
    expect({foo: obj2}).to.have.deep.nested.property('foo.a', {b: 2});
    

    Please notice that the old methods which used the old behavior of the deep flag on the assert interface have been renamed. They all have had the deep word changed by the nested word. If you want to know more about this please take a look at #757.

  • Previously, expect(obj).not.property(name, val) would throw an Error if obj didn’t have a property named name. This change causes the assertion to pass instead. The assert.propertyNotVal and assert.deepPropertyNotVal assertions were renamed to assert.notPropertyVal and assert.notDeepPropertyVal, respectively. (Related Issues: #16, #743, #758)
  • You can now use the deep flag for the .include assertion in order to perform a deep equality check to see if something is included on the target. Previously, .include was using strict equality (===) for non-negated property inclusion, but deep equality for negated property inclusion and array inclusion. This change causes the .include assertion to always use strict equality unless the deep flag is set. Please take a look at this comment if you want to know more about it. (Related Issues: #743, PRs: #760, #761)

    const obj = {a: 1};
    expect([obj]).to.deep.include({a:1});
    expect({foo: obj}).to.deep.include({foo: {a:1}});
    
  • Fix unstable behavior of the NaN assertion. Now we use the suggested ES6 implementation. The new implementation is now more correct, strict and simple. While the old one threw false positives, the new implementation only checks if something is NaN (or not if the .not flag is used) and nothing else. (Related Issues: #498, #682, #681, PRs: #508)

    // Only `NaN` will be considered to be `NaN` and nothing else
    expect(NaN).to.be.NaN;
      
    // Anything that is not `NaN` cannot be considered as `NaN`
    expect('randomString').not.to.be.NaN;
    expect(true).not.to.be.NaN;
    expect({}).not.to.be.NaN;
    expect(4).not.to.be.NaN;
    
  • Throw when calling _superon overwriteMethodif the method being overwritten is undefined. Currently if the method you are trying to overwrite is not defined and your new method calls _super it will throw an Error.(Related Issues: #467, PRs: #528) Before this change, calling _super would simply return this.

    // Considering the method `imaginaryMethod` does not exist, this would throw an error for example:
    chai.use(function (chai, utilities) {
      chai.Assertion.overwriteMethod('imaginaryMethod', function (_super) {
        return function () {
          _super.apply(this, arguments);
        }
      });
    });
      
    // This will throw an error since you are calling `_super` which should be a method (in this case, the overwritten assertion) that does not exist
    expect('anything').to.imaginaryMethod(); 
    
  • Now showDiff is turned on by default whenever the showDiff flag is anything other than false. This issue will mostly affect plugin creators or anyone that made extensions to the core, since this affects the Assertion.assert method. (Related Issues: #574, PRs: #515)

    // Now whenever you call `Assertion.assert` with anything that is not false for the `showDiff` flag it will be true
    // The assertion error that was thrown will have the `showDiff` flag turned on since it was not passed to the `assert` method
    try {
      new chai.Assertion().assert(
          'one' === 'two'
        , 'expected #{this} to equal #{exp}'
        , 'expected #{this} to not equal #{act}'
        , 'one'
        , 'two'
      );
    } catch(e) {
      assert.isTrue(e.showDiff);
    }
      
    // The assertion error that was thrown will have the `showDiff` flag turned off since here we passed `false` explicitly
    try {
      new chai.Assertion().assert(
          'one' === 'two'
        , 'expected #{this} to equal #{exp}'
        , 'expected #{this} to not equal #{act}'
        , 'one'
        , 'two'
        , false
      );
    } catch(e) {
      assert.isFalse(e.showDiff);
    }
    
  • The Typed Array types are now truncated if they’re too long (in this case, if they exceed the truncateThreshold value on the config). (Related Issues: #441, PRs: #576)

    var arr = [];
    for (var i = 1; i <= 1000; i++) {
      arr.push(i);
    }
      
    // The assertion below will truncate the diff shown and the enourmous typed array will be shown as:
    // [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, ...  ] instead of printing the whole typed array
    chai.expect(new Float32Array(100)).to.equal(1);
    
  • The assertions: within, above, least, below, most, increase, decrease will throw an error if the assertion’s target or arguments are not numbers. (Related Issues: #691, PRs: #692, #796)

    // These will throw errors, for example:
    expect(null).to.be.within(0, 1);
    expect(null).to.be.above(10);
    expect(null).to.be.at.least(20);
    expect(null).to.be.below(20);
    expect(null).to.be.at.most(20);
    expect(null).to.increase.by(20);
    expect(null).to.decrease.by(20);
      
    // This will not:
    expect('string').to.have.a.length.of.at.least(3);
    
  • Previously, expect(obj).not.ownProperty(name, val) would throw an Error if obj didn’t have an own property (non-inherited) named name. This change causes the assertion to pass instead. (Related Issues: #795, #, PRs: #744, #810)*

    expect({ foo: 'baz' }).to.not.have.own.property('quux', 'baz');
    
  • The .empty assertion will now throw when it is passed non-string primitives and functions (PRs: #763, #812)

    // These will throw TypeErrors:
    expect(Symbol()).to.be.empty;
    expect(function() {}).to.be.empty;
    expect(true).to.be.empty;
    expect(1).to.be.empty
    
  • Assertion subject (obj) changes when using ownProperty or own.property and thus enables chaining. (Related Issues: #281, PRs: #641)

    expect({val: 20}).to.have.own.property('val').above(10);
    
  • The utils (second argument passed to the chai.use callback function) no longer exports the getPathValue function. If you want to use that please use the pathval module, which is what chai uses internally now. (Related Issues: #457, #737, PRs: #830)

New Features

  • Throw when non-existent property is read. (Related Issues: #407, #766 PRs: #721, #770) This is a potentially breaking change. Your build will fail if you have typos in your property assertions Before 4.x.x when using property assertions they would not throw an error if you wrote it incorrectly. The example below, for example, would pass:

    expect(true).to.be.ture; // Oops, typo, now Chai will throw an Error
    

    Since this implementation depends on ES6 Proxies it will only work on platforms that support it.

    This property can be enabled (default) or disabled through the config.useProxy property, for example:

    chai.config.useProxy = false;  // disable use of Proxy
    
  • Add fix suggestions when accessing a nonexistent property in proxy mode. (Related Issues: #771, PRs: #782) When a nonexistent property is accessed in proxy mode, Chai will compute the levenshtein distance to all possible properties in order to suggest the best fix to the user.

    expect(false).to.be.fals; // Error: Invalid Chai property: fals. Did you mean "false"?
    expect('foo').to.be.undefind; // Error: Invalid Chai property: undefind. Did you mean "undefined"?
      
    // If the Levenshtein distance between the word and any Chai property is greater than 4, no fix will be suggested
    expect('foo').to.be.fdsakfdsafsagsadgagsdfasf // error thrown, no fix suggested
    
  • When non-chainable methods (including overwritten non-chainable methods) are used incorrectly an error will be thrown with a helpful error message. (PRs: #789)

    expect(true).to.equal.true;  // Invalid Chai property: equal.true. See docs for proper usage of "equal".
    
  • Add a new configuration setting that describes which keys will be ignored when checking for non-existing properties on an assertion before throwing an error. Since this implementation depends on ES6 Proxies it will only work on platforms that support it. Also, if you disable config.useProxy, this setting will have no effect. *(Related Issues: #765, PRs: #774)

    chai.config.proxyExcludedKeys.push('nonExistingProp');
      
    expect('my string').to.nonExistingProp; // This won't throw an error now
    
  • Add script that registers should as a side-effect. (Related Issues: #594, #693 PRs: #604)

    // You can now write:
    import 'chai/should';
      
    // as opposed to:
    import {should} from 'chai';
    should();
    

    You can also register should via a mocha option: mocha --require chai/should.

  • The change assertion accepts a function as object. (Related Issues: #544, PRs: #607)

    // Now you can also check if the return value of a function changes, for example
    assert.increases(
      someOperation,
      () => getSomething().length
    )
    
  • You can also assert for a delta using the by assertion alongside the change, increase and decrease assertions. (Related Issues: #339, PRs: #621)

  // You can use `.by` to assert the amount you want something to change
  var obj = { val: 10 };
  var increaseByTwo = function() { obj.val += 2 };
  var decreaseByTwo = function() { obj.val -= 2 };
  var increaseByThree = function() { obj.val += 3 };
  
  expect(increaseByThree).to.change(obj, 'val').by(3);
  expect(increaseByTwo).to.increase(obj, 'val').by(2);
  expect(decreaseByTwo).to.decrease(obj, 'val').by(2);
  
  // Please notice that if you want to assert something did change but not by some amount you need to use `.not` **after** the `change` related assertion
  // Take a look at the examples below:
  expect(increaseByThree).to.change(obj, 'val').but.not.by(5)
  expect(increaseByTwo).to.increase(obj, 'val').but.not.by(1)
  expect(decreaseByTwo).to.decrease(obj, 'val').but.not.by(1)
  • The .keys assertion can now operate on maps and sets. (Related Issues: #632, PRs: #633, #668)
  // The `.keys` assertion now works on `map`s and `set`s natively, like the examples below:
  expect(new Map([[{objKey: 'value'}, 'value'], [1, 2]])).to.contain.key({objKey: 'value'});
  expect(new Map([[{objKey: 'value'}, 'value'], [1, 2]])).to.contain.any.keys([{objKey: 'value'}, {anotherKey: 'anotherValue'}]);
  expect(new Map([['firstKey', 'firstValue'], [1, 2]])).to.contain.all.keys('firstKey', 1);
  expect(new Set([['foo', 'bar'], ['example', 1]])).to.have.any.keys('foo');
  
  // You can also use `.deep` when asserting agains `Map`s and `Set`s
  expect(new Map([[{objKey: 'value'}, 'value'], [1, 2]])).to.contain.any.deep.keys([{objKey: 'value'}, {anotherKey: 'anotherValue'}]);
  expect(new Map([['firstKey', 'firstValue'], [1, 2]])).to.contain.all.deep.keys('firstKey', 1);
  expect(new Set([['foo', 'bar'], ['example', 1]])).to.have.any.deep.keys('foo');
  • Add compatibility with strict mode. (Related Issues: #578, PRs: #665)

    // This means you can now run your code with the `--use_strict` flag on Node
    // If want to understand more about this please read the issue related to this change
    
  • Add does and but as new no-op assertion. (Related Issues: #700, #339 PRs: #621, #701)

    // You can now write assertions forming phrases with these two new words:
    expect(increaseByThree).to.change(obj, 'val').but.not.by(5);
    expect(foobar).to.have.property("baz").which.does.not.have.property("thing");
    
  • Allow use to be imported using new ES6 module syntax. (Related Issues: #718, PRs: #724)

    // You can now import `use` using the ES6 module syntax, like the example below:
    import sinonChai from "sinon-chai";
    import {expect, use} from "chai";
      
    use(sinonChai);
    

    You can also use require alongside the new ES6 destructuring feature:

    const sinonChai = require('sinon-chai');
    const {expect, use} = require("chai");
      
    use(sinonChai);
    
  • Add ordered flag for members assertion. (Related Issues: #717, PRs: #728)

    // You can now use the `ordered` flag to assert the order of elements when using the `members` assertion:
    expect([1, 2, 3]).to.include.ordered.members([1, 2]); // This passes
    expect([1, 2, 3]).to.include.ordered.members([2, 3]); // This will fail! Read the docs to know more.
    
  • Add .own flag to .property assertion. It does the same thing as .ownProperty and cannot be used alongisde the new .nested flag. (Related Issues: #795, PRs: #810)

    expect({a: 1}).to.have.own.property('a');
      
    // The example below will thrown an Error
    expect({a: {b: 1}}).to.have.own.nested.property('a.b', 1);
    
  • Add .deep support to .property assertion. (Related Issues: #795, PRs: #810)

    expect({ foo: { bar: 'baz' } }).to.have.deep.own.property('foo', { bar: 'baz' });
    expect({ foo: { bar: { baz: 'quux' } } }).to.have.deep.nested.property('foo.bar', { baz: 'quux' });
    
  • The .empty assertion will now work with ES6 collections (PRs: #763, #812, #814) Please notice that this assertion will throw an error when it is passed a WeakMap or WeakSet.

    expect(new Set()).to.be.empty;
    expect(new Map()).to.be.empty;
      
    // The examples below will throw a TypeError:
    expect(new WeakSet()).to.be.empty;
    expect(new WeakMap()).to.be.empty;
    

Bug Fixes

  • Fix missing msg argument for change related assertions. (Related Issues: None, PRs: #606)
  • The addMethod function returns a new assertion with flags copied over instead of this. (Related Issues: #562, #684, #723, PRs: #642, #660)
  • Fix stacktraces for overwritten properties and methods. (Related Issues: #659, #661)
  • Fix bug when testing Symbol equality with should syntax. (Related Issues: #669, PRs: #672)
  • Fix bug when asserting some valid ES6 keys. (Related Issues: #674, PRs: #676)
  • Fix bug caused when custom inspect method is used and this method calls stylize. (PRs: #680)
  • Fix ownProperty on objects with no prototype. (Related Issues: #688, PRs: #689)
  • Fix swapped expected and actual results for the .members assertion. (Related Issues: #511, PRs: #702)
  • Fix same.members to properly handle duplicates by treating each one as a unique member. (Related Issues: #590, PRs: #739)
  • Fix deep.have.same.members() that was not printing a diff. (PRs: #509)
  • Diff will be shown for assert’s equal and notEqual methods. (Related Issues: #790, PRs: #794)
  • The overwriteMethod, overwriteProperty, addChainableMethod, overwriteChainableMethod functions will return new assertion with flags copied over instead of this. (Related Issues: #562, #642, #791, PRs: #799)

3.5.0 / 2016-01-28

Version 3.5.0

For assert fans: you now have assert.includeDeepMembers() which matches expect().to.include.deep.members() and .should.include.deep.members()!

This release also includes a variety of small bugfixes and documentation fixes. Most notably, we are now governed by a Code Of Conduct - which gives Chai contributors (including those who files issues, work on code, or documentation, or even just hang out on our Slack & Gitter channels) safety from harassment and discrimination.

Full changes below:

Community Contributions

Documentation fixes

3.4.2 / 2015-11-15

Version 3.4.2

This is a small documentation bug fix release - it adds extra metatags to each public method to allow us to generate the docs easier for the website.

Community Contributions

Documentation fixes

3.4.1 / 2015-11-07

Version 3.4.1

This is a small documentation bug fix release - it just fixes a couple of issues with the documentation.

Community Contributions

Documentation fixes

3.4.0 / 2015-10-21

Version 3.4.0

This release improves some confusing error messages, and adds some new assertions. Key points:

  • Feature: New assertion: expect(1).oneOf([1,2,3]) - for asserting that a given value is one of a set.
  • Feature: .include() (and variants) will now give better error messages for bad object types. Before expect(undefined).to.include(1) would say “expected undefined to include 1”, now says “object tested must be an array, an object, or a string but undefined given”
  • Feature: .throw() (and variants) can now better determine the Error types, for example expect(foo).to.throw(node_assert.AssertionError) now works.
  • Feature: .closeTo is now aliased as .approximately
  • BugFix: .empty changes from 3.3.0 have been reverted, as they caused breaking changes to arrays which manually set keys.

Community Contributions

Code Features & Fixes

  • #503 Checking that argument given to expect is of the right type when using with include. By @astorije
  • #446 Make chai able to cope with AssertionErrors raised from node’s assert. By @danielbprice
  • #527 Added approximately alias to close to. By @danielbprice
  • #534 expect(inList).to.be.oneOf assertion. By @Droogans
  • #538 Revert .empty assertion change from PR #499. By @tusbar

Documentation fixes

3.3.0 / 2015-09-08

Version 3.3.0

This release adds some new assertions and fixes some quite important, long standing bugs. Here are the cliff notes:

  • Bugfix: Property assertions that fail now show a stack trace!
  • Bugfix: If you’ve used the frozen, sealed or extensible assertions to test primitives (e.g. expect(1).to.be.frozen), you may have noticed that in older browsers (ES5) these fail, and in new ones (ES6) they pass. They have now been fixed to consistently pass
  • The assert interface has been given the following new methods, to align better with other interfaces:, assert.isAtMost, assert.isAtLeast, assert.isNotTrue, assert.isNotFalse.

Community Contributions

Code Features & Fixes

Documentation fixes

3.2.0 / 2015-07-19

Version 3.2.0

This release fixes a bug with the previous additions in 3.1.0. assert.frozen/expect().to.be.frozen/.should.be.frozen all accidentally called Object.isSealed() instead. Now they correctly call Object.isFrozen().

If you’re using these features, please upgrade immediately.

It also adds aliases for a lot of assert methods:

  • expect/should..respondTo: respondsTo
  • expect/should..satisfy: satisfies
  • assert.ok: assert.isOk
  • assert.notOk: assert.isNotOk
  • assert.extensible: assert.isExtensible
  • assert.notExtensible: assert.isNotExtensible
  • assert.sealed: assert.isSealed
  • assert.notSealed: assert.isNotSealed
  • assert.frozen: assert.isFrozen
  • assert.notFrozen: assert.isNotFrozen

Community Contributions

Code Features & Fixes

3.1.0 / 2015-07-16

Version 3.1.0

This release adds assertions for extensibility/freezing/sealing on objects:

assert.extensible({});
assert.notExtensible(Object.preventExtensions({}));
expect(Object.preventExtensions({})).to.not.be.extensible;
Object.preventExtensions({}).should.not.be.extensible;

assert.notSealed({});
assert.sealed(Object.seal({}));
expect(Object.seal({})).to.be.sealed;
Object.seal({}).should.be.sealed;

assert.notFrozen({});
assert.frozen(Object.freeze({}));
expect(Object.freeze({})).to.be.frozen;
Object.freeze({}).should.be.frozen;

It also adds assertions for checking if a number is NaN:

assert.isNaN(NaN);
assert.isNotNaN(5);
expect(NaN).to.be.NaN;
expect(5).to.not.be.NaN;
NaN.should.be.NaN;
5.should.not.be.NaN;

Community Contributions

Code Features & Fixes

3.0.0 / 2015-06-04

Version 3.0.0

This release contains some small breaking changes. Most people are unlikely to notice them - but here are the breaking changes:

  • Switched from “Component” builds to “Browserify” builds for Browsers. If you’re using RequireJS with Chai, you might notice a change (chai used to be a global, now it won’t be - instead you’ll have to require it).
  • .has.property('foo', undefined) will now specifically test to make sure that the value 'foo' is actually undefined - before it simply tested that the key existed (but could have a value).
  • .to.be.a('type') has changed to support more types, including ES6 types such as 'promise', 'symbol', 'float32array' etc, this also means using ES6’s Symbol.toStringTag affects the behaviour .to.be.a(). In addition to this, Errors have the type of 'error'.
  • assert.ifError() now follows Node’s assert.ifError() behaviour - in other words, if the first argument is truthy, it’ll throw it.
  • ReleaseNotes.md is no longer maintained, see the Github Releases Page instead.
  • History.md is no longer maintained, see the Github Commit Log instead.

Community Contributions

Code Features & Fixes

Documentation fixes

2.3.0 / 2015-04-26

Version 2.3.0

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');

Community Contributions

Code Features & Fixes

Documentation fixes

2.2.0 / 2015-03-26

Version 2.2.0

Deep property strings can now be escaped using \\ - for example:

var deepCss = { '.link': { '[target]': 42 }};
expect(deepCss).to.have.deep.property('\\.link.\\[target\\]', 42)

Community Contributions

Code Features & Fixes

Documentation fixes

  • #405 Tweak documentation around deep property escaping. By @keithamus

2.1.2 / 2015-03-15

Version 2.1.2

A minor bug fix. No new features.

Community Contributions

Code Features & Fixes

2.1.1 / 2015-03-04

Version 2.1.1

Two minor bugfixes. No new features.

Community Contributions

Code Features & Fixes

  • #385 Fix a bug (also described in #387) where deep.property would not work with single key names. By @eldritch-fossicker
  • #379 Fix bug where tools which overwrite primitive prototypes, such as Babel or core-js would fail. By @dcneiner

Documentation fixes

2.1.0 / 2015-02-23

Version 2.1.0

Small release; fixes an issue where the Chai lib was incorrectly reporting the version number.

Adds new should.fail() and expect.fail() methods, which are convenience methods to throw Assertion Errors.

Community Contributions

Code Features & Fixes