refactor: postprocessing move to unit test (#18779)

tests/unit_tests/pandas_postprocessing/test_select.py

@@ -0,0 +1,55 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+import pytest
+
+from superset.exceptions import QueryObjectValidationError
+from superset.utils.pandas_postprocessing.select import select
+from tests.unit_tests.fixtures.dataframes import timeseries_df
+
+
+def test_select():
+    # reorder columns
+    post_df = select(df=timeseries_df, columns=["y", "label"])
+    assert post_df.columns.tolist() == ["y", "label"]
+
+    # one column
+    post_df = select(df=timeseries_df, columns=["label"])
+    assert post_df.columns.tolist() == ["label"]
+
+    # rename and select one column
+    post_df = select(df=timeseries_df, columns=["y"], rename={"y": "y1"})
+    assert post_df.columns.tolist() == ["y1"]
+
+    # rename one and leave one unchanged
+    post_df = select(df=timeseries_df, rename={"y": "y1"})
+    assert post_df.columns.tolist() == ["label", "y1"]
+
+    # drop one column
+    post_df = select(df=timeseries_df, exclude=["label"])
+    assert post_df.columns.tolist() == ["y"]
+
+    # rename and drop one column
+    post_df = select(df=timeseries_df, rename={"y": "y1"}, exclude=["label"])
+    assert post_df.columns.tolist() == ["y1"]
+
+    # invalid columns
+    with pytest.raises(QueryObjectValidationError):
+        select(df=timeseries_df, columns=["abc"], rename={"abc": "qwerty"})
+
+    # select renamed column by new name
+    with pytest.raises(QueryObjectValidationError):
+        select(df=timeseries_df, columns=["label_new"], rename={"label": "label_new"})