Github user BryanCutler commented on a diff in the pull request:
https://github.com/apache/spark/pull/12790#discussion_r75229691
--- Diff: python/pyspark/ml/tests.py ---
@@ -230,6 +230,15 @@ def test_pipeline(self):
self.assertEqual(5, transformer3.dataset_index)
self.assertEqual(6, dataset.index)
+ def test_identity_pipeline(self):
+ dataset = MockDataset()
+
+ def doTransform(pipeline):
+ pipeline_model = pipeline.fit(dataset)
+ return pipeline_model.transform(dataset)
+ self.assertEqual(dataset.index, doTransform(Pipeline()).index)
+ self.assertEqual(dataset.index,
doTransform(Pipeline(stages=[])).index)
--- End diff --
Maybe, but these are no different than any other param and we usually don't
test that we can get/set each one. I think it's safe to assume that
`setParams` will set the given value and `getStages` will return the value set
or default.
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