use key type class

Signed-off-by: Patrick <[email protected]>

aries_cloudagent/did/tests/test_did_key_operations.py

@@ -3,6 +3,7 @@
 from ...core.in_memory import InMemoryProfile
 from ...core.in_memory import InMemoryProfile
 from ...wallet.did_method import DIDMethods
+from ...wallet.key_type import ED25519
 
 
 class TestDIDKeyOperations(IsolatedAsyncioTestCase):
@@ -15,15 +16,15 @@ class TestDIDKeyOperations(IsolatedAsyncioTestCase):
 
     async def test_create_ed25519_did_key(self):
         results = await DIDKey().create(
-            key_type="ed25519", profile=self.profile, seed=self.test_seed
+            key_type=ED25519, profile=self.profile, seed=self.test_seed
         )
         assert results["did"] == self.did
         assert results["kid"] == self.kid
         assert results["multikey"] == self.multikey
 
     async def test_bind_did_key(self):
         results = await DIDKey().create(
-            key_type="ed25519", profile=self.profile, seed=self.test_seed
+            key_type=ED25519, profile=self.profile, seed=self.test_seed
         )
         results = await DIDKey().bind(did=results["did"], kid=self.new_kid)
         assert results["did"] == self.did