verify specified network adapters actually existmain

1 files changed, 11 insertions, 0 deletions

diff --git a/src/test_macros.rs b/src/test_macros.rs
index 7887647..9eb1467 100644
--- a/src/test_macros.rs
+++ b/src/test_macros.rs
@@ -50,6 +50,17 @@ macro_rules! assert_io_error {
 }
 
 #[macro_export]
+macro_rules! assert_unable_to_find_network_interface_error {
+    ($result:expr, $expected_adapter:expr) => {
+        assert_error!($result, AppError::UnableToFindNetworkInterface(adapter) => {
+            assert_eq!(adapter, $expected_adapter,
+                "Expected network adapter {:?}, but got {:?}",
+                $expected_adapter, adapter);
+        });
+    };
+}
+
+#[macro_export]
 macro_rules! assert_config_parse_error {
     ($result:expr, $expected_path:expr) => {
         assert_error!($result, AppError::ConfigParseError { path, source: _ } => {