code: def test_transform(self):
      self.tsne.fit(self.x)
      retval = self.tsne.transform(self.x_test)
      self.assertIs(type(retval), np.ndarray)
  
file_path: openTSNE/tests/test_sklearn_wrapper.py
imports: import unittest
  import numpy
  from openTSNE.sklearn import TSNE
label_desc: Use image node_id 4 for calling the TestTSNECorrectness obj's underlying member method code with example usage: obj.test_transform() without return types