Learn Rust in a Month of Lunches

14 Testing and building your code from tests

This chapter covers

• Using crates and modules to structure your code and limit how others can use it
• Using testing to prove that your code runs as it should
• Using test-driven development by writing the tests first and then the code

As your code grows, you’re going to want to think about its structure. The more you write, the more you’ll find that some code belongs in its own space, separate from other bits of code. You’ll also want to start testing your code as it grows because even Rust’s strict compiler can’t protect you from logic errors. Tests also help to remind you when you change your code if something has gone wrong. Writing tests can be a bit boring at times, but, in general, the more tests ...