code: def test_relu_to_trigger_leaky(self):
      x = np.array([-10, -5, 0.0, 5, 10])
      result_leaky = activations.relu(x, negative_slope=0.5)
      expected_leaky = np.array([-5.0, -2.5, 0.0, 5.0, 10.0])
      self.assertAllClose(result_leaky, expected_leaky, rtol=1e-05)
  
imports: import numpy
  from keras import activations
  from keras import backend
  from keras import testing
label_desc: Use image node_id 28 for calling the ActivationsTest obj's underlying member method code with example usage: obj.test_relu_to_trigger_leaky() without return types