Tests should not depend on getifaddrs succeeding.

Author: mwanner

src/ifaddrs.rs

@@ -129,9 +129,9 @@ pub fn getifaddrs() -> Result<InterfaceAddressIterator> {
 mod tests {
     use super::*;
 
+    // Only checks if getifaddrs can be invoked without panicking.
     #[test]
     fn test_getifaddrs() {
-        let addrs = getifaddrs();
-        assert!(addrs.is_ok());
+        let _ = getifaddrs();
     }
 }