Add raise in terms of wrong datatype

github_query.py

@@ -39,7 +39,7 @@ def pr_labels(latest_release_date, query_tags, repo_name):
 def version_increment(latest_release_date, query_tags, repo_name):
     """Output a calculated version increment suggestion.
 
-    latest_release_date (str): datatime string\n
+    latest_release_date (str): datetime string\n
     query_tags (str): csv string\n
     repo_name (str): repo name as <owner><repo>\n
     """

src/conversion_logic.py

@@ -122,6 +122,10 @@ def get_version_increment(pr_label_list: list, patch_bump_list: list=[], minor_b
         logger.warning("PR label list was empty")
         return ""
 
+    for name, param in locals().items():
+        if not isinstance(param, list):
+            raise ValueError(f"{name} must be a list.")
+
     if any(label in pr_label_list for label in major_bump_list):
         return "major"
 

tests/test_github_query.py

@@ -56,6 +56,10 @@ def pr_api_output_missing_label():
 def major_bump():
     return ["epic"]
 
+@pytest.fixture
+def major_bump_no_list():
+    return "epic"
+
 @pytest.fixture
 def minor_bump():
     return ["feature", "enhancement"]
@@ -206,3 +210,12 @@ def test_get_version_increment_empty_list(minor_bump, patch_bump, pr_labels_empt
         )
 
     assert increment == ""
+
+def test_get_version_increment_no_list(minor_bump, patch_bump, major_bump_no_list, pr_labels_epic):
+     with pytest.raises(ValueError, match="must be a list"):
+        conversion_logic.get_version_increment(
+            pr_label_list=pr_labels_epic,
+            patch_bump_list=patch_bump,
+            minor_bump_list=minor_bump,
+            major_bump_list=major_bump_no_list,
+            )