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//! Shared fixtures for xtask's unit tests.
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use std::sync::{Mutex, MutexGuard, PoisonError};

            

        

            

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static PROCESSES: Mutex<()> = Mutex::new(());

            

        

            

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/// Held by every test that starts a process. A test that writes a script and

            

        

            

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/// then runs it fails with ETXTBSY when another test forks while the script is

            

        

            

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/// still open for writing, because the forked child keeps that descriptor

            

        

            

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/// until its own exec. Serialising process-starting tests closes that window.

            

        

            

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pub fn processes() -> MutexGuard<'static, ()> {

            

        

            

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    PROCESSES.lock().unwrap_or_else(PoisonError::into_inner)

            

        

            

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}