test(cz/customize): add test case initialize_cz_customize_failed

Author: Lee-W

tests/test_cz_customize.py

@@ -1,7 +1,8 @@
 import pytest
 
-from commitizen.config import TomlConfig
+from commitizen.config import BaseConfig, TomlConfig
 from commitizen.cz.customize import CustomizeCommitsCz
+from commitizen.error_codes import MISSING_CONFIG
 
 
 @pytest.fixture(scope="module")
@@ -37,6 +38,14 @@ def config():
     return TomlConfig(data=toml_str, path="not_exist.toml")
 
 
+def test_initialize_cz_customize_failed():
+    with pytest.raises(SystemExit) as excinfo:
+        config = BaseConfig()
+        _ = CustomizeCommitsCz(config)
+
+    assert excinfo.value.code == MISSING_CONFIG
+
+
 def test_bump_pattern(config):
     cz = CustomizeCommitsCz(config)
     assert cz.bump_pattern == "^(break|new|fix|hotfix)"