From 56f728169dfd55c16ee35293fa42e2093cf9a787 Mon Sep 17 00:00:00 2001
From: R-Palazzo <romainpalazzo@gmail.com>
Date: Fri, 27 Oct 2023 07:37:05 -0600
Subject: [PATCH] tests

---
 tests/integration/test_hyper_transformer.py | 42 ++++++++++++++++++++-
 1 file changed, 40 insertions(+), 2 deletions(-)

diff --git a/tests/integration/test_hyper_transformer.py b/tests/integration/test_hyper_transformer.py
index ed820a001..fdd85a236 100644
--- a/tests/integration/test_hyper_transformer.py
+++ b/tests/integration/test_hyper_transformer.py
@@ -1481,6 +1481,44 @@ def test_hypertransformer_with_mutli_column_transformer_end_to_end(self):
         pd.testing.assert_frame_equal(transformed_data, expected_transformed_data)
         pd.testing.assert_frame_equal(reverse_transformed_data, data_test)
 
+    def test_hypertransformer_with_mutli_column_transformer_and_single_column(self):
+        """Test a mutli column transformer used with for a single column."""
+        # Setup
+        data_test = pd.DataFrame({
+            'A': ['1.0', '2.0', '3.0'],
+            'B2': ['4.0', '5.0', '6.0'],
+            'C': [True, False, True]
+        })
+        dict_config = {
+            'sdtypes': {
+                'A': 'categorical',
+                'B2': 'categorical',
+                'C': 'boolean'
+            },
+            'transformers': {
+                'A': DummyMultiColumnTransformerNumerical(),
+                ('B2'): DummyMultiColumnTransformerNumerical(),
+                'C': UniformEncoder()
+            }
+        }
+        config = Config(dict_config)
+        ht = HyperTransformer()
+        ht.set_config(config)
+
+        # Run
+        transformed_data = ht.fit_transform(data_test)
+        reverse_transformed_data = ht.reverse_transform(transformed_data)
+
+        # Assert
+        expected_transformed_data = pd.DataFrame({
+            'A': [1.0, 2.0, 3.0],
+            'B2': [4.0, 5.0, 6.0],
+            'C': [0.04206197607326308, 0.8000968077312287, 0.06325519846695522]
+        })
+
+        pd.testing.assert_frame_equal(transformed_data, expected_transformed_data)
+        pd.testing.assert_frame_equal(reverse_transformed_data, data_test)
+
     def test_update_transformers_single_to_multi_column(self):
         """Test ``update_transformers`` to go from single to mutli column transformer."""
         # Setup
@@ -1515,13 +1553,13 @@ def test_update_transformers_single_to_multi_column(self):
             },
             'transformers': {
                 'C': UniformEncoder(),
-                "('A', 'B')": DummyMultiColumnTransformerNumerical()
+                ('A', 'B'): DummyMultiColumnTransformerNumerical(),
             }
         })
 
         expected_multi_columns = {
             'A': ('A', 'B'),
-            'B': ('A', 'B')
+            'B': ('A', 'B'),
         }
 
         assert repr(new_config) == repr(expected_config)