Implement Eq and PartialEq for Error.

Author: qwandor

src/errors.rs

@@ -11,7 +11,7 @@ pub(crate) fn new_error(kind: ErrorKind) -> Error {
 pub type Result<T> = result::Result<T, Error>;
 
 /// An error that can occur when encoding/decoding JWTs
-#[derive(Debug)]
+#[derive(Debug, Eq, PartialEq)]
 pub struct Error(Box<ErrorKind>);
 
 impl Error {
@@ -133,6 +133,9 @@ impl PartialEq for ErrorKind {
     }
 }
 
+// Equality of ErrorKind is an equivalence relation: it is reflexive, symmetric and transitive.
+impl Eq for ErrorKind {}
+
 impl From<base64::DecodeError> for Error {
     fn from(err: base64::DecodeError) -> Error {
         new_error(ErrorKind::Base64(err))