From b414834c623db057c15d16a6b0180d16115e1523 Mon Sep 17 00:00:00 2001
From: Scott Sadler <scott@scottsadler.de>
Date: Thu, 2 Apr 2020 13:59:15 -0300
Subject: [PATCH 1/2] test for encoding of unknown with one child

---
 src/lib.rs | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/lib.rs b/src/lib.rs
index ca5fb9c..c52d5c1 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1642,4 +1642,21 @@ mod tests {
             assert_eq!(raw_oid, &expected[6..(expected.len() - 4)]);
         }
     }
+
+    #[test]
+    fn encode_unknowns() {
+        fn encode_structure(bufs: &[Vec<u8>]) -> Vec<u8> {
+            let mut body = Vec::new();
+            for (i, buf) in bufs.iter().enumerate() {
+                let mut der = to_der(&ASN1Block::Unknown(ASN1Class::ContextSpecific, false, 0, BigUint::from_usize(i).unwrap(), buf.to_vec())).unwrap();
+                body.append(&mut der);
+            }
+            let block = ASN1Block::Unknown(ASN1Class::ContextSpecific, true, 0, BigUint::from_u8(0).unwrap(), body);
+            to_der(&block).unwrap()
+        }
+
+        let decoded = from_der(&encode_structure(&vec![vec![0]])).unwrap();
+        let expected = [ASN1Block::Unknown(ASN1Class::ContextSpecific, true, 0, BigUint::from_u8(0).unwrap(), vec![128, 1, 0])];
+        assert_eq!(decoded, expected);
+    }
 }

From 924f79f6a3c61d83f9caf56759b62ccec2b920a5 Mon Sep 17 00:00:00 2001
From: Scott Sadler <scott@scottsadler.de>
Date: Thu, 2 Apr 2020 13:59:38 -0300
Subject: [PATCH 2/2] fix warning

---
 src/lib.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lib.rs b/src/lib.rs
index c52d5c1..04ed16a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -401,7 +401,7 @@ pub enum ASN1EncodeErr {
 
 impl fmt::Display for ASN1EncodeErr {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.write_str(self.description())
+        f.write_str(&self.to_string())
     }
 }