use rayon_core::ThreadPoolBuilder; | |
use std::error::Error; | |
#[test] | |
fn double_init_fail() { | |
let result1 = ThreadPoolBuilder::new().build_global(); | |
assert!(result1.is_ok()); | |
let err = ThreadPoolBuilder::new().build_global().unwrap_err(); | |
assert!(err.source().is_none()); | |
assert_eq!( | |
err.to_string(), | |
"The global thread pool has already been initialized.", | |
); | |
} |