Update tests to not use Namespace

tests/test_main.py

@@ -27,11 +27,12 @@ def test_parse_args_backtesting(mocker) -> None:
         main(['backtesting'])
     assert backtesting_mock.call_count == 1
     call_args = backtesting_mock.call_args[0][0]
-    assert call_args.config == ['config.json']
-    assert call_args.verbosity == 0
-    assert call_args.subparser == 'backtesting'
-    assert call_args.func is not None
-    assert call_args.ticker_interval is None
+    assert call_args["config"] == ['config.json']
+    assert call_args["verbosity"] == 0
+    assert call_args["subparser"] == 'backtesting'
+    assert call_args["func"] is not None
+    assert callable(call_args["func"])
+    assert call_args["ticker_interval"] is None
 
 
 def test_main_start_hyperopt(mocker) -> None:
@@ -42,10 +43,11 @@ def test_main_start_hyperopt(mocker) -> None:
         main(['hyperopt'])
     assert hyperopt_mock.call_count == 1
     call_args = hyperopt_mock.call_args[0][0]
-    assert call_args.config == ['config.json']
-    assert call_args.verbosity == 0
-    assert call_args.subparser == 'hyperopt'
-    assert call_args.func is not None
+    assert call_args["config"] == ['config.json']
+    assert call_args["verbosity"] == 0
+    assert call_args["subparser"] == 'hyperopt'
+    assert call_args["func"] is not None
+    assert callable(call_args["func"])
 
 
 def test_main_fatal_exception(mocker, default_conf, caplog) -> None: