From 25d4579b291dec69d8f1e9432fe223d04211cd92 Mon Sep 17 00:00:00 2001
From: Steve Moyer <smoyer1@selesy.com>
Date: Thu, 10 Jul 2025 06:11:07 -0400
Subject: [PATCH] test(ucan): add test for updated UCAN example varsig

---
 eddsa_test.go | 42 ++++++++++++++++++++++++++++++++++++++++++
 rsa_test.go   |  2 +-
 2 files changed, 43 insertions(+), 1 deletion(-)

diff --git a/eddsa_test.go b/eddsa_test.go
index 342f8d1..875cff2 100644
--- a/eddsa_test.go
+++ b/eddsa_test.go
@@ -1,6 +1,7 @@
 package varsig_test
 
 import (
+	"encoding/base64"
 	"encoding/hex"
 	"testing"
 
@@ -56,3 +57,44 @@ func TestDecodeEd25519(t *testing.T) {
 		})
 	})
 }
+
+func TestUCANExampleV1(t *testing.T) {
+	t.Parallel()
+
+	// This test is the value shown in the UCAN v1.0.0 example, which is
+	// an EdDSA varsig = v1 with the Ed25519 curve, SHA2_256 hashing and
+	// DAG-CBOR content encoding.
+	example, err := base64.RawStdEncoding.DecodeString("NAHtAe0BE3E")
+	require.NoError(t, err)
+
+	t.Run("Decode", func(t *testing.T) {
+		t.Parallel()
+
+		v, err := varsig.Decode(example)
+		require.NoError(t, err)
+
+		rsaV, ok := v.(varsig.EdDSAVarsig)
+		require.True(t, ok)
+
+		assert.Equal(t, varsig.Version1, rsaV.Version())
+		assert.Equal(t, varsig.DiscriminatorEdDSA, rsaV.Discriminator())
+		assert.Equal(t, varsig.CurveEd25519, rsaV.Curve())
+		assert.Equal(t, varsig.HashAlgorithmSHA512, rsaV.HashAlgorithm())
+		assert.Equal(t, varsig.PayloadEncodingDAGCBOR, rsaV.PayloadEncoding())
+		assert.Len(t, rsaV.Signature(), 0)
+	})
+
+	t.Run("Encode", func(t *testing.T) {
+		t.Parallel()
+
+		edDSAVarsig, err := varsig.NewEdDSAVarsig(
+			varsig.CurveEd25519,
+			varsig.HashAlgorithmSHA512,
+			varsig.PayloadEncodingDAGCBOR,
+		)
+		require.NoError(t, err)
+
+		assert.Equal(t, example, edDSAVarsig.Encode())
+		t.Log(base64.RawStdEncoding.EncodeToString(edDSAVarsig.Encode()))
+	})
+}
diff --git a/rsa_test.go b/rsa_test.go
index 6f64184..7f22236 100644
--- a/rsa_test.go
+++ b/rsa_test.go
@@ -52,7 +52,7 @@ func TestRSAVarsig(t *testing.T) {
 	})
 }
 
-func TestUCANExample(t *testing.T) {
+func TestUCANExampleV0(t *testing.T) {
 	t.Parallel()
 
 	const keyLen = 0x100