Add still failing test

I2PSecretKeys_test.go

@@ -0,0 +1,56 @@
+package i2pkeys
+
+import (
+	"crypto"
+	"crypto/ed25519"
+	"crypto/rand"
+	"testing"
+)
+
+func TestSecretKeyOperations(t *testing.T) {
+    // Generate test keys
+    pub, priv, err := ed25519.GenerateKey(rand.Reader)
+    if err != nil {
+        t.Fatalf("Failed to generate test keys: %v", err)
+    }
+    
+    keys := I2PKeys{
+        Address: I2PAddr(pub),
+        Both:    string(priv),
+    }
+    
+    t.Run("SecretKey", func(t *testing.T) {
+        sk, err := keys.SecretKey()
+        if err != nil {
+            t.Fatalf("SecretKey() error = %v", err)
+        }
+        
+        if sk.Type() != KeyTypeEd25519 {
+            t.Errorf("Wrong key type, got %v, want %v", sk.Type(), KeyTypeEd25519)
+        }
+    })
+    
+    t.Run("Sign", func(t *testing.T) {
+        message := []byte("test message")
+        sig, err := keys.Sign(rand.Reader, message, crypto.Hash(0))
+        if err != nil {
+            t.Fatalf("Sign() error = %v", err)
+        }
+        
+        if !ed25519.Verify(pub, message, sig) {
+            t.Error("Signature verification failed")
+        }
+    })
+    
+    t.Run("HostnameEntry", func(t *testing.T) {
+        hostname := "test.i2p"
+        entry, err := keys.HostnameEntry(hostname, crypto.Hash(0))
+        if err != nil {
+            t.Fatalf("HostnameEntry() error = %v", err)
+        }
+        
+        if entry == "" {
+            t.Error("Empty hostname entry")
+        }
+    })
+}