Writing the Code
Write your code in
src/lib.rs. Some exercises come with a stub file in
src/lib.rs that will show you the signatures of the code you'll need to write. If the exercise does not come with a
src/lib.rs file, create one.
The directory must be named
src and the file must be named
lib.rs otherwise your code will not compile. For more details, check out the rustlang book chapter on modules
To run the tests, all you need to do is run the following command:
$ cargo test
Only the first test is enabled by default. After you are ready to pass the next test, remove the ignore flag from the next test (
#[ignore]). You can also remove the flag from all the tests at once if you prefer.
You should try to write as little code possible to get the tests to pass. Let the test failures guide you to what should be written next.
Because Rust checks all code at compile time you may find that your tests won't compile until you write the required code. Even
ignored tests are checked at compile time. You can comment out tests that won't compile by starting each line with a
//. Then, when you're ready to work on that test, you can un-comment it.