issue 150: some issues with configuration (#151)

* issue 150: some issues with configuration

src/system/config_client.rs

@@ -645,7 +645,7 @@ mod tests {
     }
 
     #[test]
-    fn test_system_config_remote_ssh_config() {
+    fn should_get_and_set_ssh_config_dir() {
         let tmp_dir: TempDir = TempDir::new().ok().unwrap();
         let (cfg_path, key_path): (PathBuf, PathBuf) = get_paths(tmp_dir.path());
         let mut client: ConfigClient = ConfigClient::new(cfg_path.as_path(), key_path.as_path())
@@ -655,7 +655,14 @@ mod tests {
         let home_dir = dirs::home_dir().unwrap_or_else(|| PathBuf::from("/root"));
         let mut ssh_config_path = "~/.ssh/config".to_string();
         ssh_config_path = ssh_config_path.replacen('~', &home_dir.to_string_lossy(), 1);
-        assert_eq!(client.get_ssh_config(), Some(ssh_config_path.as_str())); // Null ?
+
+        let ssh_config_path = if PathBuf::from(&ssh_config_path).exists() {
+            Some(ssh_config_path)
+        } else {
+            None
+        };
+
+        assert_eq!(client.get_ssh_config(), ssh_config_path.as_deref()); // Null ?
         client.set_ssh_config(Some(String::from("/tmp/ssh_config")));
         assert_eq!(client.get_ssh_config(), Some("/tmp/ssh_config"));
         client.set_ssh_config(None);