I would also like to point out that the code we’ve written can be improved in many ways. We’ll also use the classnames package to highlight form fields with validation errors. In this step, we’ll create some static data to test with. Once everything is valid, you can press Save again. test/.

The example used to introduce Feathers in the Getting Started tutorial. Feathers makes testing your application a lot easier because the services we create can be tested directly instead of having to fake HTTP requests and responses. Since everything on top of our own hooks and services is already provided (and tested) by Feathers, we can require the application object and use the service methods directly. Fortunately, this project has been kept up to date as well. To-Dos. Now, open backend/src/mongoose.js and change this line: This will squash an annoying deprecation warning. If you check your console output, you should get a JSON object similar to this structure: Let’s now define the necessary actions to save a new contact to the database. Make sure Raw input enabled is set to on, then press the green Send button to create a new contact. Using Istanbul we can add it easily: Now we have to update the scripts section of our package.json to: For TypeScript we also have to install the TypeScript reporter: And then update the package.json like this: On Windows, the coverage command looks like this: This will print out some additional coverage information. The first test below verifies that users can be created, the profile image gets set and the password gets encrypted. In that case, it’s recommended to move such code into a shareable action file. The ContactList component will be a functional component (a plain JavaScript function which returns a React element): For the top-level containers, I’m using pages.

For more in-depth JavaScript knowledge, read our book, JavaScript: Novice to Ninja, 2nd Edition. Then open src/App.js and rewrite the code like this: Run yarn start from the react-contact-manager directory to start the project. That’s it - our chat guide is completed!

For now, we’ll use this placeholder code: Populate the ContactFormPage component with this code: Now let’s create the navigation menu and define the routes for our App. ', # Install Fomantic UI CSS and Semantic UI React, // { type: 'success|fail', title:'Info|Error' content:'lorem ipsum'}, 'Phone number must be in International format', /^\w+([.-]?\w+)*@\w+([.-]?\w+)*(\.\w{2,3})+$/, // eslint-disable-next-line no-unused-vars, replace hard-coded URLs with environment variables, refactor code in certain places to make it cleaner, implement the reducer code in a separate file, improve error handling by implementing user friendly messages, write unit and end-to-end tests using modern testing frameworks.
The second verifies that the password does not get sent to external requests: Replace test/services/users.test.js with the following: Replace test/services/users.test.ts with the following: We take a similar approach for the messages service test. Your browser should automatically open http://localhost:3000 and you should see the heading “Contact Manager”. @daffl Thanks for the examples.

like this in test/services/users.test.js: E.g. But there is a much faster, easier and complete approach. The reason behind this move is to promote code re-usability. Next, let’s look at how to add new contacts, and to do that we need forms.

I love learning new technologies that bring efficiencies and increased productivity to my workflow. By now, your application should allow users to add new contacts and update existing ones. As a challenge, try to modify the delete button’s onClick handler so that it asks the user to confirm or cancel the delete action. Details. In the end, I started server in mocha before hook and created the user in beforeEach hook, and then test each service against supertest. Let’s assume you forgot to start the back-end server and the Mongo database service. These two fields will be populated automatically whenever we create or update a record. Next, update src/contact-list-page.js to perform the data fetch request and use that result to update the global state. Get help App.js is often referred to as the “layout template” for a single-page application: Finally, update the src/index.js file with this code, where we import Formantic-UI for styling and BrowserRouter for using the HTML5 history API, which will keep our app in sync with the URL: Make sure that the create-react-app server is still running (if not, start it using yarn start), then visit http://localhost:3000. Let’s replace the existing code in the src/pages/contact-form-page.js file with the following: When the page loads, it checks if an _id exists in the URL. By default, the generator creates a service test file that only tests that the service exists. This should trigger the following validation error messages: You can now start filling in the form. You can’t join records with REST API unless you write a custom route that executes a JOIN SQL/non-SQL query. The delete button should work as expected, with a confirmation message displayed at the top.

First, ensure both the Mongo database and the back-end server and are running in separate terminals.

The Principles of Beautiful Web Design, 4th Edition. We’ll also use Semantic UI React to quickly build our user interface without having to define lots of class names.
The best way to test an application is by writing tests that make sure it behaves to clients as we would expect.

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