Testing Ethereum and Bitcoin Wallet Functionality

Lesson 6

Objective: In this lesson, we'll focus on testing the functionality of our app's Ethereum and Bitcoin wallets. We'll write comprehensive tests to ensure the reliability and security of wallet features, proper functionality for each route, and error handling. We'll also test the database to ensure we get and set the correct data.

High-Level Steps

1. Set up the testing environment:

   • Configure Jest to test Ethereum and Bitcoin wallet functionality.

   • Install and set up supertest to test API endpoints.

   • Configure mongoldb to mock the database during tests.

   • Optionally, integrate wallaby.js for real-time test feedback.

2. Write tests for Ethereum wallet functionality

   • Test retrieving Ethereum wallet balances.

   • Test sending transactions to Ethereum addresses.

   • Test interacting with Ethereum smart contracts.

3. Write tests for Bitcoin wallet functionality:

   • Test retrieving Bitcoin wallet balances.

   • Test sending transactions to Bitcoin addresses.

   • Test performing operations on Bitcoin wallets.

4. Run tests and analyze code coverage:

   • Execute the test suite using Jest.

   • Generate code coverage reports using Istanbul.

   • Identify areas of the codebase that require additional testing.

Tools and Libraries

• Jest: A popular testing framework for JavaScript projects.

• supertest: A library for testing HTTP servers in Node.js.

• mongodb-memory-server: An in-memory MongoDB instance for testing database interactions.

• istanbul: A code coverage tool that integrates with Jest.

• wallaby.js (optional): A productivity tool for real-time test feedback and code coverage.

1. Configure Jest:

   • Install Jest and related dependencies.

   • Create a Jest configuration file (jest.config.js) to specify the test environment, test file patterns, and coverage settings.

   • Update package.json scripts to run tests and generate coverage reports.

2. Set up Supertest:

   • Install Supertest and configure it to work with our application's API endpoints.

   • Write tests for API routes related to Ethereum and Bitcoin wallet functionality.

3. Configure Mongodb-memory-server:

   • Install Mongodb-memory-server and configure it to spin up an in-memory MongoDB instance during tests.

   • Ensure that tests use the in-memory database instead of the production database.

4. Write tests for Ethereum wallet functionality:

   • Create test files for Ethereum wallet controllers and services.

   • Write unit tests for functions that retrieve Ethereum wallet balances, send transactions, and interact with smart contracts.

   • Mock dependencies (e.g., Web3.js) using Jest's mocking capabilities.

5. Write tests for Bitcoin wallet functionality:

   • Create test files for Bitcoin wallet controllers and services.

   • Write unit tests for functions that retrieve Bitcoin wallet balances, send transactions, and perform wallet operations.

   • Mock dependencies (e.g., Bitcoin libraries) using Jest's mocking capabilities.

6. Run tests and analyze code coverage:

   • Run the test suite using the configured Jest command.

   • Generate code coverage reports using Istanbul.

   • Review the coverage reports to identify codebase areas lacking sufficient test coverage.

   • Add additional tests to improve overall code coverage.

By following these steps and utilizing the tools and libraries mentioned, we can ensure that our Ethereum and Bitcoin wallet functionality is thoroughly tested and reliable.

Let's dive into the hands-on practice and write tests for our Crypto Portfolio Tracker app!