code: def test_evolutionary(self):
      self.start_tests(name="evolutionary")
  
      self.unittest(
          optimizer=dict(type="evolutionary", learning_rate=1e-3)
      )
  
      self.unittest(
          optimizer=dict(
              type="evolutionary", learning_rate=1e-3, num_samples=5
          )
      )
  
file_path: tensorforce/test/test_optimizers.py
imports: import unittest
  from test.unittest_base import UnittestBase
label_desc: Use image node_id 1 for calling the TestOptimizers obj's underlying member method code with example usage: obj.test_evolutionary() without return types