Writing Tests for Custom Matchers in Jest

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  • yeoman

    Yeoman - a set of tools for automating development workflow

    This happened recently when writing a Yeoman generator to quickly scaffold new projects. I wanted to write something like expect(result).toHaveDevDependency("typescript") to assert that the package.json file generated with the project includes a specified package in its devDependencies.

  • jest

    Delightful JavaScript Testing.

    If you're familiar with Jest, you're likely also familiar with custom matchers.

  • Appwrite

    Appwrite - The Open Source Firebase alternative introduces iOS support . Appwrite is an open source backend server that helps you build native iOS applications much faster with realtime APIs for authentication, databases, files storage, cloud functions and much more!

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