UnverifiedBiscuit: add consistency tests with Biscuit

biscuit-auth/src/token/unverified.rs

@@ -374,3 +374,44 @@ impl UnverifiedBiscuit {
         self.append_third_party(&decoded)
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use crate::{BiscuitBuilder, BlockBuilder, KeyPair};
+
+    use super::UnverifiedBiscuit;
+
+    #[test]
+    fn consistent_with_biscuit() {
+        let root_key = KeyPair::new();
+        let external_key = KeyPair::new();
+        let biscuit = BiscuitBuilder::new()
+            .fact("test(true)")
+            .unwrap()
+            .build(&root_key)
+            .unwrap()
+            .append(BlockBuilder::new().fact("test(false)").unwrap())
+            .unwrap();
+        let req = biscuit.third_party_request().unwrap();
+        let res = req
+            .create_block(
+                &external_key.private(),
+                BlockBuilder::new().fact("third_party(true)").unwrap(),
+            )
+            .unwrap();
+        let biscuit = biscuit
+            .append_third_party(external_key.public(), res)
+            .unwrap();
+
+        let unverified = UnverifiedBiscuit::from_base64(biscuit.to_base64().unwrap()).unwrap();
+
+        unverified.clone().verify(root_key.public()).unwrap();
+
+        assert_eq!(unverified.blocks, biscuit.blocks);
+
+        assert_eq!(
+            unverified.external_public_keys(),
+            biscuit.external_public_keys()
+        );
+    }
+}