Polls app

This is an application that lets users vote through the public Polls API.

The project uses:

• React Native for iOS & Android app development
• TypeScript for type-safety
• Redux for state management
• Sagas for managing side effects
• React Native Testing Library for testing the components

The aim of this project is to be used as a reference on how to:

• test and structure a React Native + Redux project
• use TypeScript and Redux-Saga in a React Native + Redux project

Supported features

Pagination	Voting	Creating questions

Structure of the project

The folder structure of the project looks as follows:

src
└── assets
└── components
└── navigation
└── screens
└── services
├── store
│ └── sagas
│ ├── selectors
│ └── slices
└── styles
└── test
└── types
└── App.tsx

assets

Contains images used in the project. Other shared assets should be stored here (e.g. fonts, videos, etc.).

components

Contains reusable UI components.

navigation

Contains navigation related files (Navigators, NavBar, etc.).

screens

Contains screens of the app. Each screen has dedicated folders for components and hooks.

services

Contains APIClient and APIHelpers. Other services should be stored here (e.g. localization, error tracking, etc.).

store

• sagas: Sagas used for side effects of Redux actions
• selectors: Selectors to retrieve and compute derived data from the Redux state
• slices: Slices of the Redux state which contain actions and reducers

styles

Contains colors and other style values (icon sizes, spacings, etc.) used throughout the app.

test

Contains test related files (jest setup, mocks, etc.).

types

Contains the types used throughout the project.

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NOTE

For bigger projects I'd recommend creating separate folders for each feature. That way it's easier to navigate the project. Also, several developers can work on different features without having to worry too much about merge conflicts.

Example:

src
└── assets
└── components
└── navigation
└── services
├── features
│ └── login
│ | └── components
│ | ├── screens
│ | └── store
│ └── questions
│ | └── components
│ | ├── screens
│ | └── store
└── styles
└── test
└── types
└── App.tsx

Please, keep in mind that there are many other ways in which you can structure a React Native project. This is the approach that has worked for me. Feel free to adopt it either partially or fully and see if it fits your needs.

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Running

Install dependencies:

yarn

cd ios && pod install

Start packager:

yarn start

iOS:

Run the app:

yarn ios

If you prefer Xcode rather than command line:

• open ./ios/PollsApp.xcworkspace in Xcode
• select a simulator or a device
• hit the Run button

Android:

Have an Android emulator running (quickest way to get started), or a device connected

Run the app:

yarn android