Using quickcheck and tests directory

help
1

Hi,
I have a small problem with importing a macro.

When I have a file like src/x.rs then I can use the #quickcheck macro when I have this in the src/lib.rs:

#[cfg(test)]
extern crate quickcheck;
#[cfg(test)]
#[macro_use(quickcheck)]
extern crate quickcheck_macros;

I have moved all my tests to the tests directory. This way it works:

#[cfg(test)]
#[macro_use(quickcheck)]
extern crate quickcheck_macros;

#[cfg(test)]
extern crate quickcheck;


#[cfg(test)]
mod tests {

    #[quickcheck]
    fn test(value: u8) -> bool {
        assert_eq!(value, value);
        true
    }
}

When I added the module to the tests/mod.rs:

mod t;

then I get this error:

error[E0468]: an `extern crate` loading macros must be at the crate root
 --> tests/t.rs:3:1
  |
3 | extern crate quickcheck_macros;
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

It looks fine, just like in the src directory, so've moved this to the tests/mod.rs

#[cfg(test)]
#[macro_use(quickcheck)]
extern crate quickcheck_macros;

#[cfg(test)]
extern crate quickcheck;

and now I get this:

error: cannot find attribute `quickcheck` in this scope
 --> tests/t.rs:6:7
  |
6 |     #[quickcheck]
  |       ^^^^^^^^^^

And now I'm not sure how to fix it. Any ideas?

thanks,
Szymon

2

The extern crate statement should no longer be necessary. Try leaving it out and importing the macro with a use statement instead.

3

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