Chai assert

The assert style chai assert very similar to node. Of the three style options, assert is the only one that is not chainable.

Cypress bundles the popular Chai assertion library, as well as helpful extensions for Sinon and jQuery , bringing you dozens of powerful assertions for free. If you're looking to understand how to use these assertions please read about assertions in our Introduction to Cypress guide. Aliases listed can be used interchangeably with their original chainer. You can see the entire list of available BDD Chai assertions here. These getters are also available for BDD assertions. They don't actually do anything, but they enable you to write clear, english sentences.

Chai assert

For more information or to download plugins, view the documentation. Chai is an assertion library , similar to Node's built-in assert. It makes testing much easier by giving you lots of assertions you can run against your code. To install it, type:. You can also use it within the browser; install via npm and use the chai. For example:. Import the library in your code, and then pick one of the styles you'd like to use - either assert , expect or should :. Read more about these styles in our docs. Chai offers a robust Plugin architecture for extending Chai's assertions and interfaces. Please make sure you follow our Code Of Conduct and we also strongly recommend reading our Contributing Guide.

Asserts that value is not a boolean. Can be used to assert the inclusion of a value in an array, a substring in a string, chai assert, or a subset of properties in an object.

The assert style is very similar to node. Of the three style options, assert is the only one that is not chainable. Check out the Style Guide for a comparison. Throw a failure. Asserts non-strict inequality!

The assert style is very similar to node. Of the three style options, assert is the only one that is not chainable. Check out the Style Guide for a comparison. Throw a failure. Asserts that object is truthy. Asserts that object is falsy. Asserts non-strict inequality! Asserts strict inequality!

Chai assert

This is an addon plugin for the Chai Assertion Library. Install via npm. Chai HTTP provides an interface for live integration testing via superagent.

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Asserts that subset is included in superset - using deep equality checking. Sponsor this project opencollective. Asserts that object is frozen cannot have new properties added to it and its existing properties cannot be modified. Asserts that value is null. Asserts that value is not a function. Asserts that the target is neither null nor undefined. Asserts that object has a length or size with the expected value. Asserts that value is not false. Asserts that object is not frozen. Asserts that object has a direct or inherited property named by property , which can be a string using dot- and bracket-notation for nested reference. Can be used to assert the absence of a subset of properties in an object while ignoring inherited properties. When asserting a subset of properties in an object, the object is searched to confirm that at least one of the given property keys is either not present or not strictly equal to the given property value. Dismiss alert. Feel free to reach out to any of the core contributors with your questions or concerns. Because we are using chai , that means you can extend it however you'd like.

This section of the guide introduces you to the three different assertion styles that you may use in your testing environment.

Asserts that object has a property named by property with value given by value. Asserts that object has a length property with the expected value. Asserts that object is sealed cannot have new properties added to it and its existing properties cannot be removed. You signed in with another tab or window. Cypress GitHub repository Cypress Discord. What is Chai? Notice how we use these assertions listed above with. For non-function objects, it gets the count of own enumerable string keys. Import the library in your code, and then pick one of the styles you'd like to use - either assert , expect or should :. Asserts that value is not a boolean. Asserts that haystack includes needle. Asserts that object is not extensible.