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44 lines
1.5 KiB
Markdown
44 lines
1.5 KiB
Markdown
# rustlings
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A cool thing that is currently in development.
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## How it's structured
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Ideally, like RubyKoans, all exercises can be run by executing one command, in this case
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`cargo run` (most likely). This runs `src/main.rs`, which in turn runs all of the exercises.
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Each exercise is contained in a Rust file called `about_<exercise topic>.rs`. A minimal exercise looks
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somewhat like this:
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```rust
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fn exercise_function() {
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"hello"
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}
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mod tests {
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use super::*;
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pub fn test() {
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verify!("REPLACE ME", exercise_function(), "Function description");
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}
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}
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pub fn exec() {
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tests::test();
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}
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```
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Each exercise file is supposed to have one `exec` function which gets called by the `main.rs` file.
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This function, in turn, calls all individual test functions.
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The tests themselves can generally be structured in whatever way is desired, there doesn't have to be a "tests" module, for example. Two macros are provided
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for convenience. The `verify` helper function is essentially a specialized `assert_eq!`, but it doesn't panic
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if the values mismatch, instead it prints out a helpful error message and keeps going. The
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`verify_easy` function is designed as a drop-in replacement for the `verify` function for if the learner needs help solving the exercise. It prints the expected value, too.
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This is roughly what the console output for a simple exercise looks right now:
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Keep in mind that this is a very early draft of how things work. Anything here might be changed
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at any time, and this documentation should be updated accordingly.
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