Fix tests

tests/file.rs

@@ -78,7 +78,7 @@ fn no_file() {
 
 #[test]
 fn may_not_read_file() {
-  let symbol = get_symbol(&Path::new("/etc/shadow"));
+  let symbol = FileSymbol::new(Path::new("/etc/shadow"), "");
 
   assert_eq!(symbol.target_reached().is_err(), true);
 }

tests/setup.rs

@@ -60,7 +60,7 @@ fn can_create_an_acme_cert() {
       .unwrap(),
     "/etc/ssl/local_certs/somehost.crt",
   );
-  assert_eq!(*count.borrow(), 15);
+  assert_eq!(*count.borrow(), 19);
 }
 
 #[test]

tests/storage.rs

@@ -104,12 +104,12 @@ fn empty_storage() {
   assert!(storage.read_filename().is_err());
   assert_eq!(
     storage.read_filename().unwrap_err().to_string(),
-    "entity not found"
+    "No such file or directory (os error 2)"
   );
   assert!(storage.recent_date().is_err());
   assert_eq!(
     storage.recent_date().unwrap_err().to_string(),
-    "entity not found"
+    "No such file or directory (os error 2)"
   );
 }