Auto merge of #144 - yvan-sraka:patch-0, r=komaeda

Add errors to exercises that compile without user changes

Hi !

I played a bit with rustlings, and I felt that some exercises were incorrect because they passed the tests without me needing to edit the files!

This gave me the feeling that the exercise was skiped! Especially when I use `rustlings watch`, it is easy to miss an exercise because the compilation error that is displayed is the one of the next exercise ...

It is easy to identify "broken" exercises with:

```bash
% find exercises -name "*.rs" | xargs -n 1 rustlings run
...
 Successfully ran exercises/move_semantics/move_semantics4.rs
 Successfully tested exercises/test2.rs
```

My suggestion is to make sure that these files trigger a compilation error by adding a simple syntax error (e.g. with `???` in the code that must change) so that our Rustacean can then play with it!
This commit is contained in:
bors 2019-04-22 01:50:48 +00:00
commit e336d04c79
2 changed files with 8 additions and 2 deletions

View file

@ -16,7 +16,8 @@ fn main() {
}
fn fill_vec(vec: Vec<i32>) -> Vec<i32> {
// `fill_vec()` no longer take `vec: Vec<i32>` as argument
fn fill_vec() -> Vec<i32> {
let mut vec = vec;
vec.push(22);

View file

@ -17,6 +17,11 @@ mod tests {
#[test]
fn returns_twice_of_positive_numbers() {
assert_eq!(4, 4);
assert_eq!(times_two(4), ???);
}
#[test]
fn returns_twice_of_negative_numbers() {
// TODO write an assert for `times_two(-4)`
}
}