Revised test cases.

tests/hlapi/asyncio/manager/cmdgen/test_usm_none_none_wrong_user.py

@@ -17,4 +17,5 @@ async def test_usm_no_auth_no_priv_wrong_user():
     )
 
     assert isinstance(errorIndication, UnknownUserName)
-    # assert str(errorIndication) == 'Unknown USM user'
+    assert str(errorIndication) == 'Unknown USM user'
+    snmpEngine.transportDispatcher.closeDispatcher()

tests/hlapi/asyncio/manager/cmdgen/test_usm_sha_aes128.py

@@ -1,7 +1,6 @@
 import pytest
 from pysnmp.hlapi.asyncio import *
 
-
 @pytest.mark.asyncio
 async def test_usm_sha_aes128():
     snmpEngine = SnmpEngine()
@@ -15,7 +14,7 @@ async def test_usm_sha_aes128():
     errorIndication, errorStatus, errorIndex, varBinds = await getCmd(
         snmpEngine,
         authData,
-        UdpTransportTarget(("demo.pysnmp.com", 161)),
+        UdpTransportTarget(("demo.pysnmp.com", 161), retries=0),
         ContextData(),
         ObjectType(ObjectIdentity("SNMPv2-MIB", "sysDescr", 0)),
     )

tests/hlapi/asyncio/manager/cmdgen/test_usm_sha_aes128_wrong_user.py

@@ -0,0 +1,26 @@
+import pytest
+from pysnmp.hlapi.asyncio import *
+from pysnmp.proto.errind import UnknownUserName
+
+@pytest.mark.asyncio
+async def test_usm_sha_aes128_wrong_user():
+    snmpEngine = SnmpEngine()
+    authData = UsmUserData(
+        "usr-sha-aes-not-exist",
+        "authkey1",
+        "privkey1",
+        authProtocol=usmHMACSHAAuthProtocol,
+        privProtocol=usmAesCfb128Protocol,
+    )
+    errorIndication, errorStatus, errorIndex, varBinds = await getCmd(
+        snmpEngine,
+        authData,
+        UdpTransportTarget(("demo.pysnmp.com", 161), retries=0),
+        ContextData(),
+        ObjectType(ObjectIdentity("SNMPv2-MIB", "sysDescr", 0)),
+    )
+
+    assert isinstance(errorIndication, UnknownUserName)
+    assert str(errorIndication) == 'Unknown USM user'
+
+    snmpEngine.transportDispatcher.closeDispatcher()