Added tests

tests/test_commands.py

@@ -95,7 +95,7 @@ def teardown():
 
         assert r.auth(username=username, password="strong_password") is True
 
-        with pytest.raises(exceptions.ResponseError):
+        with pytest.raises(exceptions.AuthenticationError):
             r.auth(username=username, password="wrong_password")
 
     def test_command_on_invalid_key_type(self, r):

tests/test_connection_pool.py

@@ -545,22 +545,38 @@ def test_connect_from_url_unix(self):
         )
 
     @skip_if_redis_enterprise()
-    def test_connect_no_auth_supplied_when_required(self, r):
+    def test_connect_no_auth_configured(self, r):
         """
-        AuthenticationError should be raised when the server requires a
-        password but one isn't supplied.
+        AuthenticationError should be raised when the server is not configured with auth
+        but credentials are supplied by the user.
         """
+        # Redis < 6
         with pytest.raises(redis.AuthenticationError):
             r.execute_command(
                 "DEBUG", "ERROR", "ERR Client sent AUTH, but no password is set"
             )
 
+        # Redis >= 6
+        with pytest.raises(redis.AuthenticationError):
+            r.execute_command(
+                "DEBUG", "ERROR", "ERR AUTH <password> called without any password "
+                "configured for the default user. Are you sure "
+                "your configuration is correct?"
+            )
+
     @skip_if_redis_enterprise()
-    def test_connect_invalid_password_supplied(self, r):
-        "AuthenticationError should be raised when sending the wrong password"
+    def test_connect_invalid_auth_credentials_supplied(self, r):
+        """
+        AuthenticationError should be raised when sending invalid username/password
+        """
+        # Redis < 6
         with pytest.raises(redis.AuthenticationError):
             r.execute_command("DEBUG", "ERROR", "ERR invalid password")
 
+        # Redis >= 6
+        with pytest.raises(redis.AuthenticationError):
+            r.execute_command("DEBUG", "ERROR", "WRONGPASS")
+
 
 @pytest.mark.onlynoncluster
 class TestMultiConnectionClient: