Testing Rust Applications: From Unit Tests to Integration Coverage

The book "Testing Rust Applications" is a practical guide that will help you master all aspects of testing code in the Rust language. From simple unit tests to complex integration testing scenarios, you will learn how to make your code as reliable and error-resistant as possible.

What is this book about?

Rust is renowned for its safety and performance, but even the strictest compiler does not guarantee the absence of logical errors. This book fills that gap. You will learn how to:

• Write unit tests — isolated testing of functions, structs, and methods.
• Create integration tests — verifying the interaction of modules, external libraries, and APIs.
• Use mock objects and stubs — for testing code that depends on external services (databases, HTTP requests, file system).
• Apply property-based testing — generating random input data to find edge cases.
• Set up CI/CD — automatic test execution with every code change.
• Measure code coverage — using tools like tarpaulin and grcov.
• Test asynchronous code — working with tokio and async/await.

Who is this book for?

The book will be useful for:

• Beginner Rust developers — who want to immediately develop the habit of writing tests.
• Experienced engineers — looking to deepen their knowledge in testing and learn advanced techniques.
• Team leads and architects — who are responsible for code quality in Rust projects.

What will you learn?

After reading this book, you will be able to:

• Organize a test infrastructure in any Rust project.
• Write readable and maintainable tests.
• Avoid common testing mistakes (e.g., test dependencies on each other).
• Integrate testing into the development process (TDD, BDD).
• Ensure high code quality without sacrificing development speed.

The book contains many code examples ready for use. You will be able to immediately apply the knowledge gained in practice. Whether you are writing a library, a web service, or a system application, this book will be your reliable companion.

Make your Rust code not only fast but also impeccably reliable!