add test case for empty_dataframe_with_required_column

Author: danlu1

tests/test_process_functions.py

@@ -772,13 +772,20 @@ def test_check_values_in_column_no_column(input_df, col, values):
             ["cfDNA", "Tumor", "test_value"],
             True,
         ),
+        (
+            pd.DataFrame({"SAMPLE_ID": [], "SAMPLE_CLASS": []}),
+            "SAMPLE_CLASS",
+            ["cfDNA", "Tumor", "test_value"],
+            False,
+        ),
     ],
     ids=[
         "no_expected_single_value",
         "no_expected_value_list",
         "have_expected_single_value",
         "have_expected_value_list",
         "have_partial_expected_value_list",
+        "empty_dataframe_with_required_column",
     ],
 )
 def test_check_values_in_column_has_column(input_df, col, values, expected_results):