ml/tests/test_stat.py

0001 #
0002 # Licensed to the Apache Software Foundation (ASF) under one or more
0003 # contributor license agreements.  See the NOTICE file distributed with
0004 # this work for additional information regarding copyright ownership.
0005 # The ASF licenses this file to You under the Apache License, Version 2.0
0006 # (the "License"); you may not use this file except in compliance with
0007 # the License.  You may obtain a copy of the License at
0008 #
0009 #    http://www.apache.org/licenses/LICENSE-2.0
0010 #
0011 # Unless required by applicable law or agreed to in writing, software
0012 # distributed under the License is distributed on an "AS IS" BASIS,
0013 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
0014 # See the License for the specific language governing permissions and
0015 # limitations under the License.
0016 #
0017
0018 import unittest
0019
0020 from pyspark.ml.linalg import Vectors
0021 from pyspark.ml.stat import ChiSquareTest
0022 from pyspark.sql import DataFrame
0023 from pyspark.testing.mlutils import SparkSessionTestCase
0024
0025
0026 class ChiSquareTestTests(SparkSessionTestCase):
0027
0028     def test_chisquaretest(self):
0029         data = [[0, Vectors.dense([0, 1, 2])],
0030                 [1, Vectors.dense([1, 1, 1])],
0031                 [2, Vectors.dense([2, 1, 0])]]
0032         df = self.spark.createDataFrame(data, ['label', 'feat'])
0033         res = ChiSquareTest.test(df, 'feat', 'label')
0034         # This line is hitting the collect bug described in #17218, commented for now.
0035         # pValues = res.select("degreesOfFreedom").collect())
0036         self.assertIsInstance(res, DataFrame)
0037         fieldNames = set(field.name for field in res.schema.fields)
0038         expectedFields = ["pValues", "degreesOfFreedom", "statistics"]
0039         self.assertTrue(all(field in fieldNames for field in expectedFields))
0040
0041
0042 if __name__ == "__main__":
0043     from pyspark.ml.tests.test_stat import *
0044
0045     try:
0046         import xmlrunner
0047         testRunner = xmlrunner.XMLTestRunner(output='target/test-reports', verbosity=2)
0048     except ImportError:
0049         testRunner = None
0050     unittest.main(testRunner=testRunner, verbosity=2)