2ea17afb63
## What changes were proposed in this pull request?
ML regression package testsuite add StructuredStreaming test
In order to make testsuite easier to modify, new helper function added in `MLTest`:
```
def testTransformerByGlobalCheckFunc[A : Encoder](
dataframe: DataFrame,
transformer: Transformer,
firstResultCol: String,
otherResultCols: String*)
(globalCheckFunction: Seq[Row] => Unit): Unit
```
## How was this patch tested?
N/A
Author: WeichenXu <weichen.xu@databricks.com>
Author: Bago Amirbekian <bago@databricks.com>
Closes #19979 from WeichenXu123/ml_stream_test.
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