code: def test_given_dependent_nonlinear_data_when_perform_generalised_cov_based_independence_test_then_returns_expected_result():
      z = np.random.randn(1000, 1)
      w = np.random.randn(1000, 1)
      x = np.exp(z + np.random.rand(1000, 1))
      y = np.exp(z + np.random.rand(1000, 1))
  
      assert 0.05 > generalised_cov_based(x, y, w)
  
file_path: dowhy/tests/gcm/independence_test/test_generalised_cov_measure.py
imports: import random
  import numpy
  import pytest
  from flaky import flaky
  from dowhy.gcm import generalised_cov_based
  from tests.gcm.independence_test.test_kernel import _generate_categorical_data
label_desc: Use image node_id 3 for calling a global function with example usage: test_given_dependent_nonlinear_data_when_perform_generalised_cov_based_independence_test_then_returns_expected_result() without return types