code: def test_tracker_host_port_from_cli__hostname_port():
      input_str = "1.2.3.4:9090"
      expected_host = "1.2.3.4"
      expected_port = 9090
  
      actual_host, actual_port = tracker_host_port_from_cli(input_str)
  
      assert expected_host == actual_host
      assert expected_port == actual_port
  
imports: from tvm.driver.tvmc.tracker import tracker_host_port_from_cli
label_desc: Use image node_id 1 for calling a global function with example usage: test_tracker_host_port_from_cli__hostname_port() without return types