diff options
Diffstat (limited to 'library/std/src/sys_common/net/tests.rs')
-rw-r--r-- | library/std/src/sys_common/net/tests.rs | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/library/std/src/sys_common/net/tests.rs b/library/std/src/sys_common/net/tests.rs new file mode 100644 index 000000000..ac75d9ebf --- /dev/null +++ b/library/std/src/sys_common/net/tests.rs @@ -0,0 +1,19 @@ +use super::*; +use crate::collections::HashMap; + +#[test] +fn no_lookup_host_duplicates() { + let mut addrs = HashMap::new(); + let lh = match LookupHost::try_from(("localhost", 0)) { + Ok(lh) => lh, + Err(e) => panic!("couldn't resolve `localhost': {e}"), + }; + for sa in lh { + *addrs.entry(sa).or_insert(0) += 1; + } + assert_eq!( + addrs.iter().filter(|&(_, &v)| v > 1).collect::<Vec<_>>(), + vec![], + "There should be no duplicate localhost entries" + ); +} |