Add new test for invalid TLS configuration

src/base/err_utils.rs

@@ -1,7 +1,12 @@
-use std::error::Error;
+use std::fmt::Display;
 use std::io::ErrorKind;
 
 /// Encapsulate errors in [`std::io::Error`] with a message
-pub fn encpasulate_error<E: Error>(e: E, msg: &str) -> std::io::Error {
+pub fn encpasulate_error<E: Display>(e: E, msg: &str) -> std::io::Error {
     std::io::Error::new(ErrorKind::Other, format!("{}: {}", msg, e))
 }
+
+/// Create a new [`std::io::Error`]
+pub fn new_err(msg: &str) -> std::io::Error {
+    std::io::Error::new(ErrorKind::Other, msg.to_string())
+}