rustc-ap-rustc_span 727.0.0

Automatically published version of the package `rustc_span` in the rust-lang/rust repository from commit 9a27044f42ace9eb652781b53f598e25d4e7e918 The publishing script for this crate lives at: https://github.com/alexcrichton/rustc-auto-publish 
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use super::*;

use crate::{edition, SessionGlobals};

#[test]
fn interner_tests() {
    let mut i: Interner = Interner::default();
    // first one is zero:
    assert_eq!(i.intern("dog"), Symbol::new(0));
    // re-use gets the same entry:
    assert_eq!(i.intern("dog"), Symbol::new(0));
    // different string gets a different #:
    assert_eq!(i.intern("cat"), Symbol::new(1));
    assert_eq!(i.intern("cat"), Symbol::new(1));
    // dog is still at zero
    assert_eq!(i.intern("dog"), Symbol::new(0));
}

#[test]
fn without_first_quote_test() {
    SESSION_GLOBALS.set(&SessionGlobals::new(edition::DEFAULT_EDITION), || {
        let i = Ident::from_str("'break");
        assert_eq!(i.without_first_quote().name, kw::Break);
    });
}