Guilherme-07062002/inversify-sample

This is a sample project to demonstrate how Inversify can be used with Express and TypeScript.

Inversify Sample

This is a sample project to demonstrate how Inversify can be used with Express and TypeScript.

How to run

Clone the repository

git clone https://github.com/Guilherme-07062002/inversify-sample.git

Install the dependencies

npm install

Run the server

npm run dev

After that, the server will be running on http://localhost:3000

How to use

To test the server, you can use the create user endpoint: (POST) /users

Example:

{
  "name": "user",
  "email": "email@email.com",
  "password": "1234"
}

When you explore the code, you will see that the CreateUserController is using a implementation of UserRepository to create the user. All of these classes are being injected using Inversify.

Advantages

Using Inversify, you can easily change the implementation of a class without changing the code that uses it. This is very useful when you are writing tests, for example.

By the way, only binding the interfaces to the implementations, you can easily mock the classes and test the code.

Example:

container.bind<UserRepository>(REPOSITORY_TYPES.UserRepository).to(FakeUserRepository);

With this line, you are binding the UserRepository interface to the FakeUserRepository implementation. Now, every time that the UserRepository is injected, the FakeUserRepository will be used, discarting the need of create a 'factory' or something like that.