Remove unwrap_str_err method from UnwrapError test trait

With upcoming changes we intend to move towards a model where we do not
distinguish the individual error variants the program deals with in a
global enum.
In preparation of such a change, this patch marks a first step in
removing the UnwrapError test trait, which relies on the existence of
exactly such typed errors. In particular, we remove the unwrap_str_err
method from it, basically falling back to just working with strings.

1 files changed, 6 insertions, 3 deletions

diff --git a/src/tests/encrypted.rs b/src/tests/encrypted.rs
index aed2662..a47c3c9 100644
--- a/src/tests/encrypted.rs
+++ b/src/tests/encrypted.rs
@@ -1,7 +1,7 @@
 // encrypted.rs
 
 // *************************************************************************
-// * Copyright (C) 2019 Daniel Mueller (deso@posteo.net)                   *
+// * Copyright (C) 2019-2020 Daniel Mueller (deso@posteo.net)              *
 // *                                                                       *
 // * This program is free software: you can redistribute it and/or modify  *
 // * it under the terms of the GNU General Public License as published by  *
@@ -61,9 +61,12 @@ $"#,
 
 #[test_device(pro)]
 fn encrypted_open_on_pro(model: nitrokey::Model) {
-  let res = Nitrocli::with_model(model).handle(&["encrypted", "open"]);
+  let err = Nitrocli::with_model(model)
+    .handle(&["encrypted", "open"])
+    .unwrap_err()
+    .to_string();
   assert_eq!(
-    res.unwrap_str_err(),
+    err,
     "This command is only available on the Nitrokey Storage",
   );
 }