Kyle Truong
Components can be tested with snapshot testing. Tools like Jest (often combined with Enzyme) that offer this functionality take a ‘snapshot’ of what your component renders--everything from divs, attributes, classNames, props, and state--and saves it to a file, kind of like this:
In Creating Forms with Redux Part I, we hooked up our forms to Redux, learned about the reduxForm HOC and Field component, styled our forms, and made a custom input component. In this section, we continue creating reusable components for the most common form widgets, learn how to do field-level validation, and dive a bit deeper into the built-in action creators and selectors to help us create a more dynamic form.
There are few things less appealing than forms but they’re still one of the most direct ways for a user to dump a hunk of data into your server. To make the process of filling a form as painless as possible, one needs a good form system that handles common concerns such as: