new_contents: import unittest
  
  import numpy as np
  
  class TestSklearnex(unittest.TestCase):
      def test_dbscan(self):
          from sklearnex.cluster import DBSCAN
          X = np.array([[1., 2.], [2., 2.], [2., 3.],
              [8., 7.], [8., 8.], [25., 80.]], dtype=np.float32)
  
          clustering = DBSCAN(eps=3, min_samples=2).fit(X)
          np.testing.assert_array_equal(np.array([0, 0, 0, 1, 1, -1]), clustering.labels_)
subject: Add smoke test for sklearnex (#1143)