Using quickcheck and tests directory

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

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